
<PAGE>
 
                                                                   Exhibit 25.1

                       SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549


                                    FORM T-1

                            Statement of Eligibility
                     Under the Trust Indenture Act of 1939
                 of a Corporation Designated to Act as Trustee

                Check if an Application to Determine Eligibility
               of a Trustee Pursuant to Section 305(b)(2) ______


                         HARRIS TRUST AND SAVINGS BANK
                               (Name of Trustee)

         Illinois                                       36-1194448
 (State of Incorporation)                  (I.R.S. Employer Identification No.)

                111 West Monroe Street, Chicago, Illinois  60603
                    (Address of principal executive offices)

                Judith Bartolini, Harris Trust and Savings Bank,
                311 West Monroe Street, Chicago, Illinois, 60606
                  312-461-2527 phone   312-461-3525 facsimile
           (Name, address and telephone number for agent for service)


                              PPG Industries, Inc.
                               (Name of obligor)


      Pennsylvania                                      25-0730780
(State of Incorporation)                   (I.R.S. Employer Identification No.)


                                 One PPG Place
                         Pittsburgh, Pennsylvania 15272
                    (Address of principal executive offices)


                                Debt Securities
                        (Title of indenture securities)
<PAGE>
 
1.   GENERAL INFORMATION.  Furnish the following information as to the Trustee:

     (a)  Name and address of each examining or supervising authority to
          which it is subject.

            Commissioner of Banks and Trust Companies, State of Illinois,
            Springfield, Illinois; Chicago Clearing House Association, 164 West
            Jackson Boulevard, Chicago, Illinois; Federal Deposit Insurance
            Corporation, Washington, D.C.; The Board of Governors of the Federal
            Reserve System,Washington, D.C.

     (b)  Whether it is authorized to exercise corporate trust powers.

          Harris Trust and Savings Bank is authorized to exercise corporate
          trust powers.

2.   AFFILIATIONS WITH OBLIGOR.  If the Obligor is an affiliate of the Trustee,
     describe each such affiliation.

          The Obligor is not an affiliate of the Trustee.

3. thru 15.

          NO RESPONSE NECESSARY

16.  LIST OF EXHIBITS.

     1. A copy of the articles of association of the Trustee is now in effect
        which includes the authority of the trustee to commence business and to
        exercise corporate trust powers.

        A copy of the Certificate of Merger dated April 1, 1972 between Harris
        Trust and Savings Bank, HTS Bank and Harris Bankcorp, Inc. which
        constitutes the articles of association of the Trustee as now in effect
        and includes the authority of the Trustee to commence business and to
        exercise corporate trust powers was filed in connection with the
        Registration Statement of Louisville Gas and Electric Company, File No.
        2-44295, and is incorporated herein by reference.

     2. A copy of the existing by-laws of the Trustee.

        A copy of the existing by-laws of the Trustee was filed in connection
        with the Registration Statement of C-Cube Microsystems Inc., File
        No. 33-97166, and is incorporated herein by reference.

     3. The consents of the Trustee required by Section 321(b) of the Act.

          (included as Exhibit A on page 2 of this statement)

     4. A copy of the latest report of condition of the Trustee published
        pursuant to law or the requirements of its supervising or examining
        authority.

          (included as Exhibit B on page 3 of this statement)

                                       1
<PAGE>
 
                                   SIGNATURE


Pursuant to the requirements of the Trust Indenture Act of 1939, the Trustee,
HARRIS TRUST AND SAVINGS BANK, a corporation organized and existing under the
laws of the State of Illinois, has duly caused this statement of eligibility to
be signed on its behalf by the undersigned, thereunto duly authorized, all in
the City of Chicago, and State of Illinois, on the 31st day of October, 1995.

HARRIS TRUST AND SAVINGS BANK


By: /s/   J. Bartolini
   --------------------------
          J. Bartolini
          Vice President


EXHIBIT A

The consents of the trustee required by Section 321(b) of the Act.

Harris Trust and Savings Bank, as the Trustee herein named, hereby consents that
reports of examinations of said trustee by Federal and State authorities may be
furnished by such authorities to the Securities and Exchange Commission upon
request therefor.

HARRIS TRUST AND SAVINGS BANK


By: /s/   J. Bartolini
   --------------------------
          J. Bartolini
          Vice President


                                       2
<PAGE>
 
                                                                       EXHIBIT B

Attached is a true and correct copy of the statement of condition of Harris
Trust and Savings Bank as of June 30, 1995, as published in accordance with a
call made by the State Banking Authority and by the Federal Reserve Bank of the
Seventh Reserve District.

                             [LOGO OF HARRIS BANK]

                         Harris Trust and Savings Bank
                             111 West Monroe Street
                            Chicago, Illinois  60603

of Chicago, Illinois, And Foreign and Domestic Subsidiaries, at the close of
business on June 30, 1995, a state banking institution organized and operating
under the banking laws of this State and a member of the Federal Reserve System.
Published in accordance with a call made by the Commissioner of Banks and Trust
Companies of the State of Illinois and by the Federal Reserve Bank of this
District.

                         Bank's Transit Number 71000288


<TABLE>
<CAPTION>

                                                           THOUSANDS
                  ASSETS                                   OF DOLLARS

<S>                                               <C>               <C>
Cash and balances due from depository
 institutions:
          Non-interest bearing balances                               $975,130
           and currency and coin.............
          Interest bearing balances..........                         $619,550
Securities:..................................
a.  Held-to-maturity securities                                       $654,606
b.  Available-for-sale securities                                   $1,597,462
Federal funds sold and securities
 purchased under agreements to resell in
    domestic offices of the bank
    and of its Edge and Agreement
    subsidiaries, and in IBF's:
          Federal funds sold.................                         $272,684
          Securities purchased under                                        $0
           agreements to resell..............
Loans and lease financing receivables:
          Loans and leases, net of                $7,184,420
           unearned income...................
          LESS:  Allowance for loan and              $91,061
           lease losses......................
                                               -------------
 
          Loans and leases, net of
           unearned income, allowance,                              $7,093,359
           and reserve
          (item 4.a minus 4.b)...............
Assets held in trading accounts..............                         $335,699
Premises and fixed assets (including                                  $139,368
 capitalized leases).........................
Other real estate owned......................                           $1,018
Investments in unconsolidated                                             $195
 subsidiaries and associated companies.......
Customer's liability to this bank on                                  $120,891
 acceptances outstanding.....................
Intangible assets............................                          $21,763
Other assets.................................                         $246,739
                                                                 -------------
 
TOTAL ASSETS                                                       $12,078,464
                                                                 =============
 
</TABLE>



                                       3
<PAGE>
 
<TABLE>
<CAPTION>
 
                 LIABILITIES
<S>                                            <C>                  <C>
Deposits:
  In domestic offices........................                       $4,184,673
      Non-interest bearing...................  $2,391,354
      Interest bearing.......................  $1,793,319
  In foreign offices, Edge and               
   Agreement subsidiaries, and IBF's.........                       $2,559,227  
      Non-interest bearing...................     $33,115
      Interest bearing.......................  $2,526,112
Federal funds purchased and securities
 sold under agreements to repurchase in
 domestic offices of the bank and of
 its Edge and Agreement subsidiaries,
 and in IBF's:
  Federal funds purchased....................                       $1,361,248
  Securities sold under agreements to                              
   repurchase................................                       $1,496,277
Trading Liabilities                                                   $264,633
Other borrowed money:........................
a.  With original maturity of one year                             
     or less                                                          $883,157
b.  With original maturity of more than
     one year                                                          $13,390
Bank's liability on acceptances              
 executed and outstanding                                             $120,891
Subordinated notes and debentures............                         $235,000
Other liabilities............................                         $178,632
                                                                 -------------
TOTAL LIABILITIES                                                  $11,297,128
                                                                 =============
 
             EQUITY CAPITAL
Common stock.................................                         $100,000
Surplus......................................                         $275,000
a.  Undivided profits and capital                             
     reserves................................                         $409,797
b.  Net unrealized holding gains
     (losses) on available-for-sale
     securities                                                        ($3,461)
                                                                 -------------
 
TOTAL EQUITY CAPITAL                                                  $781,336
                                                                 =============
Total liabilities, limited-life                           
 preferred stock, and equity capital.........                      $12,078,464
                                                                 =============
</TABLE>

  I, Steve Neudecker, Vice President of the above-named bank, do hereby declare
that this Report of Condition has been prepared in conformance with the
instructions issued by the Board of Governors of the Federal Reserve System and
is true to the best of my knowledge and belief.

                                STEVE NEUDECKER
                                    7/28/95

  We, the undersigned directors, attest to the correctness of this Report of
Condition and declare that it has been examined by us and, to the best of our
knowledge and belief, has been prepared in conformance with the instructions
issued by the Board of Governors of the Federal Reserve System and the
Commissioner of Banks and Trust Companies of the State of Illinois and is true
and correct.

          ALAN G. McNALLY,
          DONALD S. HUNT,
          JAMES J. GLASSER,
                                                                      Directors.



                                       4
