<SEC-DOCUMENT>0001140361-11-024321.txt : 20110502
<SEC-HEADER>0001140361-11-024321.hdr.sgml : 20110502
<ACCEPTANCE-DATETIME>20110502170617
ACCESSION NUMBER:		0001140361-11-024321
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20110428
FILED AS OF DATE:		20110502
DATE AS OF CHANGE:		20110502

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			RIDGE GARRY O
		CENTRAL INDEX KEY:			0001191649

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-06936
		FILM NUMBER:		11801651

	MAIL ADDRESS:	
		STREET 1:		1061 CUDAHY PL
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92110

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			WD 40 CO
		CENTRAL INDEX KEY:			0000105132
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS CHEMICAL PRODUCTS [2890]
		IRS NUMBER:				951797918
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0831

	BUSINESS ADDRESS:	
		STREET 1:		1061 CUDAHY PL
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92110
		BUSINESS PHONE:		6192751400

	MAIL ADDRESS:	
		STREET 1:		1061 CUDAHY PLACE
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92110
</SEC-HEADER>
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<TYPE>4
<SEQUENCE>1
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<DESCRIPTION>FORM 4
<TEXT>
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        <issuerName>WD 40 CO</issuerName>
        <issuerTradingSymbol>WDFC</issuerTradingSymbol>
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            <rptOwnerName>RIDGE GARRY O</rptOwnerName>
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            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN DIEGO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92110</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President &amp; CEO</officerTitle>
            <otherText></otherText>
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                <value>Non-qualified Stock Option</value>
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                <value>2011-04-28</value>
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                <footnoteId id="F1"/>
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                    <value>14900</value>
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                <transactionPricePerShare>
                    <footnoteId id="F3"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2006-09-23</value>
            </exerciseDate>
            <expirationDate>
                <value>2013-09-23</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>14900</value>
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                    <value>D</value>
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            <securityTitle>
                <value>Non-qualified Stock Option</value>
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            <conversionOrExercisePrice>
                <value>29.30</value>
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                <value>2011-04-29</value>
                <footnoteId id="F1"/>
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                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
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                    <value>8300</value>
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                    <footnoteId id="F3"/>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
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            <exerciseDate>
                <value>2006-09-23</value>
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            <expirationDate>
                <value>2013-09-23</value>
            </expirationDate>
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                <underlyingSecurityTitle>
                    <value>Common Stock</value>
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                    <value>8300</value>
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                    <value>0</value>
                    <footnoteId id="F4"/>
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                    <value>D</value>
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    </derivativeTable>

    <footnotes>
        <footnote id="F1">Transaction pursuant to trading plan adopted pursuant to Rule 10b5-1 under the Securities Exchange Act of 1934.</footnote>
        <footnote id="F2">Total includes 1,099.226 shares held in WD-40 Company Profit Sharing Plan (Company Stock Fund) account. Total also includes 20,468 Restricted Stock Units, of which 14,584 are subject to future vesting, and 19,200 Performance Share Units, all of which are subject to future vesting.</footnote>
        <footnote id="F3">Not applicable.</footnote>
        <footnote id="F4">In addition to the reported options in Table II, the reporting person holds options to acquire 131,000 common shares as follows: 12,000 NQSO exercisable 10/19/07 at $27.67 expiring 10/19/14; 24,000 NQSO exercisable 10/18/08 at $27.27 expiring 10/18/15; 35,000  NQSO exercisable 10/17/09 at $35.99 expiring 10/17/16;and 60,000 NQSO exercisable 10/16/10 at $36.03 expiring 10/16/17.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Garry O. Ridge</signatureName>
        <signatureDate>2011-05-02</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
