<SUBMISSION>
<ACCESSION-NUMBER>0001036050-00-001062
<TYPE>SC TO-T/A
<PUBLIC-DOCUMENT-COUNT>2
<FILING-DATE>20000531
<SUBJECT-COMPANY>
<COMPANY-DATA>
<CONFORMED-NAME>BRUNSWICK TECHNOLOGIES INC
<CIK>0000826075
<ASSIGNED-SIC>2221
<IRS-NUMBER>010402052
<STATE-OF-INCORPORATION>ME
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>SC TO-T/A
<ACT>34
<FILE-NUMBER>005-50449
<FILM-NUMBER>646755
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>43 BIBBER PKWY
<CITY>BRUNSWICK
<STATE>ME
<ZIP>04011
<PHONE>2077297792
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>43 BIBBER PARKWAY
<CITY>BRUNSWICK
<STATE>ME
<ZIP>04011
</MAIL-ADDRESS>
</SUBJECT-COMPANY>
<FILED-BY>
<COMPANY-DATA>
<CONFORMED-NAME>COMPAGNIE DE SAINT GOBAIN
<CIK>0001012037
<ASSIGNED-SIC>
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>SC TO-T/A
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>LES MIROIRS
<STREET2>18 AVE D'ALSACE COURBEVOIE
<CITY>COURBEVOIE
<STATE>I0
<ZIP>00000
<PHONE>6103417000
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>LES MIROIRS
<CITY>PARIS LA DEFENSE CED
</MAIL-ADDRESS>
</FILED-BY>
<DOCUMENT>
<TYPE>SC TO-T/A
<SEQUENCE>1
<FILENAME>0001.txt
<DESCRIPTION>AMENDMENT NO. 16 TO SC TO-T/A
<TEXT>

<PAGE>

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549

                           ------------------------

                                  SCHEDULE TO
                     TENDER OFFER STATEMENT UNDER SECTION
          14(d)(1) OR 13(e)(1)OF THE SECURITIES EXCHANGE ACT OF 1934

                               (Amendment No. 16)
                             ---------------------

                         BRUNSWICK TECHNOLOGIES, INC.

                           (Name of Subject Company)
                           ------------------------

                          VA ACQUISITION CORPORATION

                            CERTAINTEED CORPORATION

                     Indirect wholly owned subsidiaries of

                           COMPAGNIE DE SAINT-GOBAIN

                       (Name of Filing Person--Offeror)

                           ------------------------

                   COMMON STOCK, PAR VALUE $0.0001 PER SHARE
                        (Title of Class of Securities)

                                 117394  10  6
                     (CUSIP Number of Class of Securities)
                           ------------------------

                                JOHN R. MESHER
                        VICE PRESIDENT, GENERAL COUNSEL
                                 AND SECRETARY
                            CERTAINTEED CORPORATION
                            750 E. SWEDESFORD ROAD
                       VALLEY FORGE, PENNSYLVANIA  19482
                           TELEPHONE: (610) 341-7108
           (Name, Address and Telephone Number of Person Authorized
      to Receive Notices and Communications on Behalf of Filing Persons)
                           ------------------------

                                   COPY TO:
                             PETER O. CLAUSS, ESQ.
                              PEPPER HAMILTON LLP
                             3000 TWO LOGAN SQUARE
                          EIGHTEENTH AND ARCH STREETS
                    PHILADELPHIA, PENNSYLVANIA  19103-2799
                           TELEPHONE: (215)981-4541
                           ------------------------
<PAGE>


                           CALCULATION OF FILING FEE


________________________________________________________________________________
     TRANSACTION VALUATION*              AMOUNT OF FILING FEE
________________________________________________________________________________
________________________________________________________________________________

     $40,735,280                                 $8,147
________________________________________________________________________________

*    Based on the offer to purchase, all of the outstanding shares of common
stock of Brunswick Technologies, Inc. at a purchase price of $8.00 cash per
share, 5,230,830 shares issued and outstanding as of March 15, 2000, less
713,746 shares owned by an affiliate of Offeror, and outstanding options with
respect to 574,826 shares as of December 31, 1999 with an exercise price of
$10.00 or less per share, in each case as reported in Brunswick Technologies,
Inc.'s Annual Report on Form 10-K for the calendar year ended December 31, 1999.

[x] Check box if any part of the fee is offset as provided by Rule 0-11(a)(2)
and identify the filing with which the offsetting fee was previously paid.
Identify the previous filing by registration statement number, or the Form or
Schedule and the date of its filing.

Amount Previously Paid:  $8,147
Form or Registration No.: Schedule TO
Filing Party:  VA Acquisition Corporation, CertainTeed Corporation
Date Filed:  April 20, 2000

[ ] Check the box if the filing relates solely to preliminary communications
made before the commencement of a tender offer.

Check the appropriate boxes below to designate any transactions to which the
statement relates:

[x] third party tender offer subject to Rule 14d-1.
[ ] issuer tender offer subject to Rule 13e-4.
[ ] going-private transaction subject to Rule 13e-3.

[x] amendment to Schedule 13D under Rule 13d-2.

Check the following box if the filing is a final amendment reporting the results
of the tender offer: [ ]

                                       2
<PAGE>

This Amendment No. 16 (this "Amendment") amends and supplements the Tender Offer
Statement on Schedule TO filed with the Securities and Exchange Commission on
April 20, 2000, as amended by Amendment No. 1, by Amendment No. 2, by Amendment
No. 3, by Amendment No. 4, by Amendment No. 5, by Amendment No. 6, by Amendment
No. 7, by Amendment No. 8, by Amendment No. 9, by Amendment No. 10, by Amendment
No. 11, by Amendment No. 12, by Amendment No. 13, by Amendment No. 14 and by
Amendment No. 15 thereto filed with the Commission on April 24, 2000, April 26,
2000, April 28, 2000, May 2, 2000, May 2, 2000, May 3, 2000, May 4, 2000, May 5,
2000, May 8, 2000, May 11, 2000, May 15, 2000, May 16, 2000, May 17, 2000, May
25, 2000 and May 30, 2000, respectively (collectively, the "Schedule TO") by
CertainTeed Corporation, a Delaware corporation ("CertainTeed" or the "Parent"),
and VA Acquisition Corporation, a Maine corporation and an indirect wholly owned
subsidiary of CertainTeed (the "Purchaser"), both of which are indirect wholly
owned subsidiaries of Compagnie de Saint-Gobain. The Schedule TO relates to the
offer by the Purchaser to purchase all outstanding shares of common stock, par
value $0.0001 per share, including the associated rights to purchase preferred
stock (the "Shares"), of Brunswick Technologies, Inc., a Maine corporation
("BTI" or the "Company"), at $8.00 per Share, net to the seller in cash, upon
the terms and subject to the conditions set forth in the Offer to Purchase,
dated April 20, 2000 (the "Offer to Purchase"), and in the related Letter of
Transmittal, copies of which are attached as Exhibits (a)(1) and (a)(2),
respectively, to the Schedule TO. Capitalized terms used and not defined herein
shall have the meanings ascribed to such terms in the Offer to Purchase and in
the Schedule TO.

This Amendment No. 16 to Schedule TO also constitutes Amendment No. 16 to the
statement on Schedule 13D of Parent, Saint-Gobain and Vetrotex, filed on
February 18, 1997.

ITEM 12. MATERIALS TO BE FILED AS EXHIBITS.

     Item 12 of the Schedule TO is hereby amended and supplemented to include
the following information:

     (a)(22) Copy of Vetrotex letter of May 31, 2000 to shareholders of BTI.


                                       3

<PAGE>

                                   SIGNATURE

     After due inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

    Dated: May 31, 2000


                                    VA Acquisition Corporation



                                    By: /s/ John R. Mesher
                                        ------------------
                                         John R. Mesher
                                         Vice President and Secretary

                                    CertainTeed Corporation



                                    By: /s/ John R. Mesher
                                        ------------------
                                         John R. Mesher
                                         Vice President, General Counsel
                                         and Secretary

                                       4
<PAGE>

                                 EXHIBIT INDEX



(a)(1)  Offer to Purchase, dated April 20, 2000.*

(a)(2)  Form of Letter of Transmittal.*

(a)(3)  Form of Notice of Guaranteed Delivery.*

(a)(4)  Form of Letter to Brokers, Dealers, Commercial Banks, Trust Companies
        and Other Nominees.*

(a)(5)  Form of Letter to Clients for use by Brokers, Dealers, Commercial
        Banks, Trust Companies and Other Nominees.*

(a)(6)  Guidelines for Certification of Taxpayer Identification Number on
        Substitute Form W-9.*

(a)(7)  Form of summary advertisement, dated April 20, 2000.*

(a)(8)  Text of press release issued by CertainTeed, dated April 20, 2000.*

(a)(9)  Text of press release issued by CertainTeed, dated April 24, 2000.*

(a)(10) Text of press release issued by CertainTeed, dated April 26, 2000.*

(a)(11) Text of letter to shareholders of Brunswick Technologies, Inc. dated May
        2, 2000.*

(a)(12) Text of press release issued by CertainTeed, dated May 2, 2000.*

(a)(13) Text of press release issued by CertainTeed, dated May 3, 2000.*

(a)(14) Text of newspaper advertisement issued by CertainTeed and published on
        May 4, 2000 in the Portland Press Herald and Brunswick Times Record.*

(a)(15) Text of press release and open letter to the directors of Brunswick
        Technologies, Inc. issued by CertainTeed, dated May 8, 2000.*

(a)(16) Text of press release issued by CertainTeed, dated May 11, 2000.*


(a)(17) Text of definitive additional proxy materials dated May 12, 2000 and
        sent by Vetrotex CertainTeed Corporation, a shareholder of Brunswick
        Technologies, Inc. and an affiliate of CertainTeed.*

(a)(18) Text of press release issued by CertainTeed, dated May 16, 2000.*

(a)(19) Copy of Vetrotex Answer and Counterclaims filed on May 26, 2000, in
        response to the BTI Complaint filed on May 23, 2000.*

(a)(20) Copy of Vetrotex Motion for Declaratory Judgment and Preliminary
        Injunction filed on May 26, 2000.*

(a)(21) Copy of Vetrotex letter of May 26, 2000 to directors of BTI.*

(a)(22) Copy of Vetrotex letter of May 31, 2000 to shareholders of BTI.

(d)     None.

(g)     None.

(h)     Not applicable.
___________________________

*  Previously filed as exhibits to Schedule TO.


                                       5
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.A.(22)
<SEQUENCE>2
<FILENAME>0002.txt
<DESCRIPTION>COPY OF VETROTEX LETTER TO BTI SHAREHOLDERS DATED 5/31/2000
<TEXT>

<PAGE>

                       Vetrotex CertainTeed Corporation

                            750 E. Swedesford Road
                            Valley Forge, PA 19482

                                                                   May 31, 2000

Dear Fellow Shareholder:

  As you know, CertainTeed is offering to purchase the shares of Brunswick
Technologies for $8 in cash per share. This price represents a premium of 46%
over the closing price of $5.50 on April 14, the last trading day before the
announcement of CertainTeed's offer.

  BTI's Board summarily rejected CertainTeed's premium offer. Yet, as of
today, a full month and a half after the offer was made, they have failed to
present BTI shareholders with a single credible alternative. Instead, BTI has
depleted its own resources, by waging unsuccessful battles in court and the
Maine legislature seeking to deny BTI shareholders the right to vote or tender
their shares. At the same time they have granted more than two million
dollars' worth of "golden parachute" benefits to six senior executives and
adopted a "poison pill" rights plan without your approval. These costs come
out of your pocket as a BTI shareholder and make BTI less valuable to you and
to any potential acquiror.

  Ask yourself: Do you really trust this Board to protect your interests as a
shareholder?

                     VOTE TODAY TO PROTECT YOUR INTERESTS!

  We believe BTI's Board and management have focused on preserving their own
interests to the detriment of BTI shareholders. Unless directors are elected
who are not wedded to the status quo, there remains a substantial risk that
the impediments the current Board has erected will make it impossible for
CertainTeed to purchase tendered shares. If the BTI Board continues to block
CertainTeed's offer, there is no guarantee that your shares will continue to
trade at their current level. Remember, at the time of CertainTeed's $8 offer
BTI stock traded at $5.50 and, in the 30 days before that, had traded as low
as $3.38.

  Now is the time for you to act to protect the value of your investment. You
can best protect your interests by signing, dating and returning the enclosed
GREEN proxy card today.
<PAGE>

                           PERFORMANCE VS. PROMISES

  Over the past six weeks, the BTI Board has made numerous attempts to block
or delay the June 16 shareholders' meeting. Now that those attempts have
failed, the Board is asking you to give them even more time to "create value."

  BTI has had ample time to "create value" since it went public in February of
1997, but look what has happened over just the last two and a half years:

                                    [GRAPH]

                 BTI         S&P 500

1/28/97             0             0
12/1/97         0.007          0.02
12/2/97        -0.014         0.017
12/3/97             0         0.022
12/4/97         0.007         0.019
12/5/97        -0.022          0.03
12/8/97        -0.022         0.028
12/9/97        -0.007         0.021
2/10/97        -0.065         0.015
2/11/97        -0.065             0
2/12/97        -0.094        -0.002
2/15/97        -0.122         0.008
2/16/97        -0.122         0.013
2/17/97        -0.144         0.011
2/18/97        -0.165             0
2/19/97        -0.165        -0.009
2/22/97        -0.158        -0.002
2/23/97        -0.158        -0.017
2/24/97        -0.158        -0.024
2/26/97        -0.158         -0.02
2/29/97        -0.173        -0.002
2/30/97        -0.194         0.016
2/31/97        -0.158         0.016
 1/2/98        -0.137         0.021
 1/5/98        -0.151         0.023
 1/6/98        -0.187         0.012
 1/7/98        -0.158         0.009
 1/8/98        -0.165         0.001
 1/9/98        -0.194        -0.029
1/12/98        -0.259        -0.017
1/13/98        -0.259        -0.003
1/14/98        -0.201         0.003
1/15/98        -0.158        -0.005
1/16/98        -0.079         0.006
1/20/98        -0.072         0.024
1/21/98        -0.086         0.016
1/22/98        -0.094         0.008
1/23/98        -0.083         0.002
1/26/98        -0.137         0.002
1/27/98        -0.137         0.014
1/28/98        -0.165         0.023
1/29/98        -0.187         0.031
1/30/98        -0.187         0.026
 2/2/98         -0.18         0.048
 2/3/98        -0.165         0.053
 2/4/98         -0.18         0.054
 2/5/98        -0.173          0.05
 2/6/98        -0.173          0.06
 2/9/98         -0.18         0.058
2/10/98        -0.187         0.067
2/11/98        -0.158         0.068
2/12/98        -0.108         0.072
2/13/98        -0.086         0.068
2/17/98        -0.122         0.071
2/18/98        -0.058          0.08
2/19/98        -0.036         0.076
2/20/98         -0.05         0.082
2/23/98        -0.065         0.087
2/24/98        -0.079         0.079
2/25/98        -0.086         0.092
2/26/98        -0.079         0.098
2/27/98        -0.079         0.098
 3/2/98        -0.216         0.097
 3/3/98        -0.216         0.101
 3/4/98        -0.173         0.096
 3/5/98        -0.187         0.083
 3/6/98        -0.187         0.105
 3/9/98        -0.194         0.101
3/10/98        -0.191         0.114
3/11/98        -0.201         0.118
3/12/98        -0.223          0.12
3/13/98        -0.201         0.118
3/16/98        -0.158          0.13
3/17/98        -0.165         0.131
3/18/98        -0.086         0.136
3/19/98        -0.115         0.141
3/20/98        -0.137          0.15
3/23/98        -0.173         0.147
3/24/98        -0.194         0.157
3/25/98        -0.201         0.153
3/26/98        -0.209         0.152
3/27/98         -0.18         0.147
3/30/98        -0.209         0.145
3/31/98        -0.194         0.153
 4/1/98        -0.219          0.16
 4/2/98        -0.216         0.172
 4/3/98        -0.209         0.175
 4/6/98        -0.223         0.174
 4/7/98         -0.23         0.161
 4/8/98         -0.23         0.153
 4/9/98        -0.237         0.163
4/13/98        -0.259         0.161
4/14/98         -0.27         0.168
4/15/98        -0.259         0.172
4/16/98        -0.281          0.16
4/17/98        -0.273         0.175
4/20/98        -0.281         0.176
4/21/98        -0.324         0.179
4/22/98        -0.367         0.183
4/23/98        -0.345         0.172
4/24/98        -0.353          0.16
4/27/98        -0.338         0.137
4/28/98        -0.252         0.136
4/29/98        -0.223         0.146
4/30/98        -0.194         0.164
 5/1/98        -0.194         0.173
 5/4/98        -0.165         0.174
 5/5/98        -0.165         0.168
 5/6/98        -0.187         0.156
 5/7/98         -0.23         0.146
 5/8/98        -0.281          0.16
5/11/98        -0.273         0.158
5/12/98        -0.281         0.168
5/13/98        -0.295         0.171
5/14/98        -0.288          0.17
5/15/98        -0.295          0.16
5/18/98        -0.295         0.157
5/19/98        -0.288         0.161
5/20/98        -0.317         0.171
5/21/98        -0.338         0.167
5/22/98        -0.338         0.162
5/26/98        -0.353         0.145
5/27/98        -0.367         0.143
5/28/98        -0.367         0.149
5/29/98        -0.381         0.142
 6/1/98        -0.356         0.142
 6/2/98        -0.345         0.144
 6/3/98        -0.273         0.133
 6/4/98        -0.259         0.146
 6/5/98        -0.252         0.166
 6/8/98        -0.281         0.168
 6/9/98        -0.252         0.171
6/10/98        -0.245         0.164
6/11/98        -0.309         0.146
6/12/98        -0.317          0.15
6/15/98        -0.317         0.127
6/16/98        -0.302         0.138
6/17/98        -0.281         0.159
6/18/98        -0.324         0.158
6/19/98        -0.306         0.152
6/22/98        -0.331         0.155
6/23/98        -0.385         0.172
6/24/98        -0.367         0.186
6/25/98        -0.378         0.182
6/26/98         -0.36         0.186
6/29/98        -0.302         0.192
6/30/98        -0.237         0.187
 7/1/98        -0.266         0.202
 7/2/98        -0.324           0.2
 7/6/98        -0.309         0.211
 7/7/98        -0.302         0.209
 7/8/98        -0.331         0.221
 7/9/98        -0.302         0.213
7/10/98        -0.309         0.219
7/13/98        -0.331          0.22
7/14/98        -0.331         0.233
7/15/98        -0.353          0.23
7/16/98        -0.331         0.239
7/17/98        -0.324         0.242
7/20/98        -0.367         0.239
7/21/98        -0.363         0.219
7/22/98        -0.363         0.218
7/23/98        -0.374         0.193
7/24/98        -0.367         0.194
7/27/98        -0.378         0.201
7/28/98        -0.381         0.183
7/29/98        -0.378         0.178
7/30/98        -0.381         0.196
7/31/98        -0.388         0.173
 8/3/98        -0.417         0.164
 8/4/98        -0.453         0.122
 8/5/98        -0.468         0.132
 8/6/98        -0.439          0.14
 8/7/98        -0.432          0.14
8/10/98        -0.424         0.134
8/11/98        -0.439         0.119
8/12/98        -0.439         0.135
8/13/98        -0.432         0.125
8/14/98        -0.446         0.112
8/17/98        -0.453         0.134
8/18/98        -0.446         0.153
8/19/98        -0.446         0.149
8/20/98        -0.461         0.143
8/21/98        -0.475         0.132
8/24/98        -0.475         0.139
8/25/98        -0.468         0.144
8/26/98        -0.475         0.135
8/27/98         -0.54         0.091
8/28/98         -0.54         0.075
8/31/98        -0.579         0.002
 9/1/98        -0.547         0.041
 9/2/98        -0.536         0.037
 9/3/98        -0.518         0.028
 9/4/98         -0.54         0.019
 9/8/98         -0.54         0.071
 9/9/98        -0.547         0.053
9/10/98        -0.568         0.026
9/11/98        -0.568         0.056
9/14/98        -0.583         0.078
9/15/98         -0.59         0.086
9/16/98        -0.604         0.094
9/17/98        -0.604         0.066
9/18/98        -0.604         0.068
9/21/98        -0.601         0.072
9/22/98        -0.604         0.078
9/23/98        -0.597         0.116
9/24/98        -0.612         0.091
9/25/98        -0.619         0.094
9/28/98        -0.608         0.098
9/29/98         -0.64         0.098
9/30/98        -0.647         0.064
10/1/98        -0.662         0.032
10/2/98        -0.705         0.049
10/5/98        -0.691         0.035
10/6/98        -0.712         0.031
10/7/98        -0.734         0.016
10/8/98        -0.741         0.004
10/9/98        -0.712          0.03
0/12/98        -0.716         0.044
0/13/98        -0.719         0.041
0/14/98        -0.727         0.052
0/15/98        -0.727         0.096
0/16/98        -0.626         0.106
0/19/98        -0.626         0.112
0/20/98        -0.612         0.114
0/21/98        -0.561          0.12
0/22/98        -0.511         0.129
0/23/98         -0.59         0.121
0/26/98        -0.619         0.122
0/27/98        -0.568         0.115
0/28/98        -0.568         0.118
0/29/98        -0.583         0.137
0/30/98        -0.576          0.15
11/2/98         -0.54         0.163
11/3/98        -0.554         0.163
11/4/98        -0.568         0.171
11/5/98        -0.568         0.187
11/6/98        -0.568         0.194
11/9/98         -0.59         0.183
1/10/98        -0.608         0.181
1/11/98        -0.594         0.173
1/12/98        -0.597          0.17
1/13/98        -0.568         0.178
1/16/98        -0.565         0.189
1/17/98        -0.576         0.193
1/18/98        -0.565         0.198
1/19/98         -0.59         0.206
1/20/98         -0.59         0.218
1/23/98        -0.583         0.244
1/24/98        -0.612         0.238
1/25/98        -0.655         0.242
1/27/98        -0.669         0.248
1/30/98        -0.683         0.218
12/1/98        -0.712          0.23
12/2/98        -0.701         0.226
12/3/98        -0.662         0.204
12/4/98        -0.619         0.232
12/7/98        -0.669         0.243
12/8/98        -0.676         0.237
12/9/98        -0.662         0.239
2/10/98        -0.662         0.219
2/11/98        -0.655         0.221
2/14/98        -0.676         0.194
2/15/98        -0.683         0.217
2/16/98        -0.691         0.216
2/17/98        -0.698         0.235
2/18/98        -0.676         0.243
2/21/98        -0.698         0.259
2/22/98        -0.691          0.26
2/23/98        -0.683         0.286
2/24/98        -0.691         0.284
2/28/98        -0.698         0.283
2/29/98        -0.612           0.3
2/30/98        -0.676         0.289
2/31/98        -0.633         0.287
 1/4/99        -0.647         0.285
 1/5/99        -0.655         0.303
 1/6/99        -0.647         0.332
 1/7/99        -0.619         0.329
 1/8/99        -0.619         0.335
1/11/99        -0.612         0.323
1/12/99        -0.612         0.297
1/13/99         -0.64         0.292
1/14/99         -0.59         0.269
1/15/99        -0.612         0.301
1/19/99        -0.626          0.31
1/20/99         -0.59         0.315
1/21/99        -0.612         0.293
1/22/99        -0.597         0.282
1/25/99        -0.612         0.292
1/26/99        -0.604         0.311
1/27/99        -0.597         0.301
1/28/99        -0.626         0.324
1/29/99         -0.64         0.339
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2/10/99        -0.669         0.281
2/11/99        -0.655         0.313
2/12/99        -0.676         0.288
2/16/99        -0.655           0.3
2/17/99         -0.64         0.281
2/18/99         -0.64         0.295
2/19/99         -0.64         0.297
2/22/99        -0.669         0.332
2/23/99        -0.655         0.331
2/24/99        -0.647         0.312
2/25/99        -0.655         0.303
2/26/99        -0.655         0.296
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3/10/99        -0.655         0.347
3/11/99        -0.658         0.358
3/12/99        -0.655         0.355
3/15/99        -0.669         0.368
3/16/99        -0.655         0.367
3/17/99        -0.655         0.358
3/18/99        -0.669         0.378
3/19/99        -0.669          0.36
3/22/99        -0.676         0.358
3/23/99        -0.665         0.321
3/24/99        -0.676         0.328
3/25/99        -0.676          0.35
3/26/99        -0.705         0.343
3/29/99        -0.669         0.371
3/30/99        -0.683         0.361
3/31/99        -0.669         0.346
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4/12/99        -0.691         0.422
4/13/99        -0.691         0.413
4/14/99        -0.691          0.39
4/15/99        -0.689         0.385
4/16/99        -0.683         0.381
4/19/99        -0.691          0.35
4/20/99        -0.683         0.367
4/21/99        -0.691         0.398
4/22/99        -0.691         0.422
4/23/99        -0.687          0.42
4/26/99        -0.691         0.424
4/27/99        -0.691         0.426
4/28/99        -0.691         0.414
4/29/99        -0.691         0.406
4/30/99        -0.698         0.398
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5/10/99         -0.64         0.403
5/11/99        -0.662         0.419
5/12/99        -0.647         0.428
5/13/99        -0.655         0.431
5/14/99        -0.655           0.4
5/17/99        -0.655         0.402
5/18/99        -0.647         0.396
5/19/99         -0.64         0.407
5/20/99        -0.647         0.401
5/21/99        -0.655         0.392
5/24/99        -0.655         0.368
5/25/99        -0.647         0.344
5/26/99        -0.655         0.366
5/27/99        -0.655         0.341
5/28/99        -0.655         0.363
 6/1/99        -0.655         0.355
 6/2/99        -0.662         0.355
 6/3/99        -0.658          0.36
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6/10/99        -0.669         0.364
6/11/99        -0.669         0.354
6/14/99        -0.669         0.354
6/15/99        -0.683         0.362
6/16/99        -0.683         0.393
6/17/99        -0.683         0.402
6/18/99        -0.683         0.406
6/21/99        -0.687         0.412
6/22/99        -0.687         0.398
6/23/99        -0.683         0.395
6/24/99        -0.691         0.377
6/25/99        -0.683         0.377
6/28/99        -0.687         0.394
6/29/99        -0.683         0.415
6/30/99        -0.687         0.437
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 7/2/99        -0.685         0.456
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7/12/99        -0.687         0.464
7/13/99        -0.691         0.459
7/14/99        -0.687         0.463
7/15/99        -0.694         0.475
7/16/99        -0.701         0.485
7/19/99        -0.698         0.473
7/20/99        -0.705         0.441
7/21/99        -0.694         0.444
7/22/99        -0.698         0.425
7/23/99        -0.694          0.42
7/26/99        -0.709         0.411
7/27/99        -0.752         0.426
7/28/99        -0.748         0.429
7/29/99        -0.748         0.404
7/30/99        -0.741         0.391
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8/10/99        -0.691         0.341
8/11/99        -0.694         0.363
8/12/99        -0.691         0.359
8/13/99        -0.705          0.39
8/16/99        -0.719         0.393
8/17/99        -0.719         0.407
8/18/99        -0.712         0.395
8/19/99        -0.705         0.385
8/20/99        -0.698         0.399
8/23/99        -0.705         0.424
8/24/99        -0.712         0.427
8/25/99        -0.712         0.446
8/26/99        -0.719         0.426
8/27/99        -0.712         0.411
8/30/99        -0.712         0.386
8/31/99        -0.705         0.382
 9/1/99        -0.712         0.393
 9/2/99        -0.716         0.381
 9/3/99        -0.716         0.421
 9/7/99        -0.723         0.413
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9/10/99        -0.716         0.415
9/13/99        -0.719         0.407
9/14/99         -0.73         0.399
9/15/99        -0.727         0.379
9/16/99        -0.734          0.38
9/17/99        -0.734         0.398
9/20/99        -0.737         0.398
9/21/99        -0.741         0.369
9/22/99        -0.741         0.372
9/23/99        -0.727          0.34
9/24/99        -0.741         0.337
9/27/99        -0.745         0.343
9/28/99        -0.741         0.342
9/29/99        -0.737         0.328
9/30/99         -0.77         0.343
10/1/99        -0.748         0.343
10/4/99        -0.755         0.366
10/5/99        -0.763         0.362
10/6/99        -0.768         0.387
10/7/99        -0.755         0.379
10/8/99        -0.737         0.398
0/11/99        -0.745         0.398
0/12/99        -0.737         0.374
0/13/99        -0.745         0.346
0/14/99        -0.737         0.343
0/15/99        -0.745         0.306
0/18/99        -0.743         0.313
0/19/99        -0.752          0.32
0/20/99        -0.763          0.35
0/21/99        -0.755         0.344
0/22/99         -0.77         0.362
0/25/99        -0.755         0.354
0/26/99        -0.763         0.342
0/27/99        -0.763         0.357
0/28/99        -0.763         0.405
0/29/99        -0.759         0.427
11/1/99        -0.755         0.417
11/2/99        -0.777         0.411
11/3/99         -0.77         0.418
11/4/99        -0.755         0.426
11/5/99        -0.763         0.434
11/8/99        -0.748         0.441
11/9/99        -0.745         0.429
1/10/99        -0.755         0.438
1/11/99        -0.745         0.446
1/12/99        -0.745         0.461
1/15/99        -0.741         0.459
1/16/99        -0.743         0.486
1/17/99        -0.763         0.477
1/18/99        -0.752         0.491
1/19/99        -0.759         0.488
1/22/99        -0.763         0.487
1/23/99        -0.763          0.47
1/24/99        -0.763         0.483
1/26/99        -0.752         0.483
1/29/99        -0.748         0.474
1/30/99        -0.755         0.454
12/1/99        -0.763         0.463
12/2/99        -0.777         0.475
12/3/99        -0.777           0.5
12/6/99        -0.772          0.49
12/7/99        -0.781         0.475
12/8/99        -0.777         0.469
12/9/99        -0.784         0.474
2/10/99        -0.791         0.483
2/13/99        -0.784         0.481
2/14/99        -0.791         0.469
2/15/99        -0.791         0.479
2/16/99        -0.784         0.485
2/17/99        -0.799         0.487
2/20/99        -0.791         0.484
2/21/99        -0.788           0.5
2/22/99        -0.799         0.503
2/23/99        -0.791         0.526
2/27/99        -0.791         0.525
2/28/99        -0.791         0.526
2/29/99        -0.791         0.532
2/30/99        -0.788         0.533
2/31/99        -0.795         0.538
 1/3/00        -0.748         0.523
 1/4/00        -0.698         0.465
 1/5/00        -0.658         0.468
 1/6/00        -0.662         0.469
 1/7/00        -0.683         0.509
1/10/00        -0.712         0.526
1/11/00        -0.734         0.506
1/12/00        -0.734         0.499
1/13/00        -0.727         0.517
1/14/00        -0.719         0.534
1/18/00        -0.727         0.523
1/19/00        -0.719         0.524
1/20/00        -0.734         0.513
1/21/00        -0.716         0.509
1/24/00        -0.719         0.467
1/25/00        -0.716         0.476
1/26/00        -0.712          0.47
1/27/00        -0.701         0.464
1/28/00        -0.705         0.424
1/31/00        -0.705          0.46
 2/1/00        -0.701         0.475
 2/2/00        -0.705         0.475
 2/3/00        -0.705         0.491
 2/4/00        -0.701         0.491
 2/7/00        -0.705         0.491
 2/8/00        -0.701         0.509
 2/9/00        -0.712         0.478
2/10/00        -0.712         0.483
2/11/00        -0.703         0.452
2/14/00        -0.705         0.455
2/15/00        -0.719         0.468
2/16/00        -0.734         0.452
2/17/00        -0.727         0.453
2/18/00        -0.727         0.409
2/22/00        -0.741         0.415
2/23/00        -0.727         0.424
2/24/00        -0.723         0.417
2/25/00        -0.719         0.396
2/28/00        -0.698         0.411
2/29/00        -0.629          0.43
 3/1/00        -0.683         0.444
 3/2/00         -0.68         0.446
 3/3/00         -0.68         0.475
 3/6/00        -0.709         0.456
 3/7/00        -0.734         0.419
 3/8/00        -0.741         0.431
 3/9/00         -0.73         0.467
3/10/00        -0.734          0.46
3/13/00        -0.719         0.448
3/14/00         -0.73         0.423
3/15/00        -0.737         0.457
3/16/00        -0.745         0.527
3/17/00        -0.741         0.533
3/20/00        -0.734         0.525
3/21/00        -0.727         0.564
3/22/00        -0.719         0.571
3/23/00        -0.683         0.599
3/24/00        -0.694         0.599
3/27/00        -0.683         0.595
3/28/00        -0.698         0.578
3/29/00        -0.698         0.579
3/30/00        -0.705         0.557
3/31/00        -0.698         0.569
 4/3/00        -0.712         0.576
 4/4/00        -0.723         0.565
 4/5/00        -0.712         0.557
 4/6/00        -0.741         0.571
 4/7/00        -0.701         0.587
4/10/00        -0.683         0.575
4/11/00         -0.68         0.571
4/12/00        -0.669         0.536
4/13/00        -0.691         0.508
4/14/00        -0.683          0.42
4/17/00        -0.565         0.467
4/18/00        -0.511         0.509
4/19/00        -0.518         0.494
4/20/00        -0.522         0.502
4/24/00        -0.522         0.497
4/25/00         -0.52         0.546
4/26/00        -0.516         0.529
4/27/00          -0.5         0.533
4/28/00        -0.471          0.52
 5/1/00        -0.482         0.537
 5/2/00        -0.496         0.514
 5/3/00        -0.489         0.481
 5/4/00        -0.496         0.475
 5/5/00        -0.489           0.5
 5/8/00        -0.493         0.491
 5/9/00        -0.495         0.478
5/10/00        -0.493         0.448
5/11/00        -0.493         0.474
5/12/00        -0.496         0.487
5/15/00        -0.496          0.52
5/16/00        -0.489         0.534
5/17/00        -0.495         0.515
5/18/00        -0.489         0.504
5/19/00        -0.486         0.473
5/22/00        -0.493         0.466
5/23/00        -0.493         0.438
5/24/00        -0.493         0.464
5/25/00        -0.496         0.446

  You should also consider that in the 38 1/2 months between the date of BTI's
initial public offering and April 14, 2000, $100 invested in the S&P 500 grew
to $174.30, while that same investment in BTI stock shrank to $55.00. For
those of you who purchased BTI stock in 1998, the performance was even more
dismal.

                 CAN YOU AFFORD TO GIVE BTI'S BOARD MORE TIME?

  Recently BTI disclosed that its earnings per share for the quarter ended
March 31, 2000 were significantly lower than last year and substantially below
street estimates.

  Despite BTI's lackluster performance, the current Board has presented no
credible alternative to CertainTeed's all-cash offer. Even in its last letter
to you, the BTI Board was still discussing acquisitions of other companies or
strategic alliances as alternatives. Ask yourself: What would happen to BTI's
stock price if the Board's attempts to block a sale were to succeed? What
assurance can BTI's Board give you that the stock price would not return to
$3.38?

                     PROTECT YOUR INVESTMENT--VOTE TODAY!

  As BTI's largest shareholder, our objective is aligned with that of all other
non-management shareholders in the company-maximizing the value of BTI. Our
nominees for the BTI Board are committed to delivering the maximum value for
your shares. Remember, you cannot accept an offer from CertainTeed-or from
anyone else, for that matter-until the "poison pill" and the other impediments
put in place by the current Board are removed.

  We believe that removal of the current directors is the only way to clear
away the obstacles that now block a sale of the company.
<PAGE>

  TO PRESERVE YOUR OPPORTUNITY TO ACCEPT THE CERTAINTEED OFFER, OR ANY OTHER
OFFER, IT IS EXTREMELY IMPORTANT TO VOTE THE GREEN PROXY CARD TODAY.

  If you have any questions, or need assistance in voting your shares, please
call our proxy solicitor, Innisfree M&A Incorporated, toll-free at 1-888-750-
5834.

  Thank you for your support.

                                          VETROTEX CERTAINTEED CORPORATION


       If you have any questions or need assistance voting your shares,
            please call the firm assisting us in this solicitation:

                          INNISFREE M&A INCORPORATED

                          TOLL-FREE AT 1-888-750-5834

               (BANKS AND BROKERS CALL COLLECT AT 212-750-5833.)

</TEXT>
</DOCUMENT>
</SUBMISSION>
