-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
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 Gf2NoZIzMtJzynVettp1sQ==

<SEC-DOCUMENT>0001179110-03-009176.txt : 20031023
<SEC-HEADER>0001179110-03-009176.hdr.sgml : 20031023
<ACCEPTANCE-DATETIME>20031023202414
ACCESSION NUMBER:		0001179110-03-009176
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031023
FILED AS OF DATE:		20031023

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			RIVERA MIRIAM C
		CENTRAL INDEX KEY:			0001252647

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-07755
		FILM NUMBER:		03955077

	MAIL ADDRESS:	
		STREET 1:		1101 CALIFORNIA AVE SUITE 100
		CITY:			CORONA
		STATE:			CA
		ZIP:			92881

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SUMMA INDUSTRIES/
		CENTRAL INDEX KEY:			0000062262
		STANDARD INDUSTRIAL CLASSIFICATION:	PLASTICS PRODUCTS, NEC [3089]
		IRS NUMBER:				951240978
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0831

	BUSINESS ADDRESS:	
		STREET 1:		21250 HAWTHORNE BLVD
		STREET 2:		STE 500
		CITY:			TORRANCE
		STATE:			CA
		ZIP:			90503
		BUSINESS PHONE:		9092733485

	MAIL ADDRESS:	
		STREET 1:		21250 HAWTHORNE BLVD
		STREET 2:		STE 500
		CITY:			TORRANCE
		STATE:			CA
		ZIP:			90503

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SUMMA INDUSTRIES /
		DATE OF NAME CHANGE:	19960416

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MOREHOUSE INDUSTRIES INC
		DATE OF NAME CHANGE:	19920703

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MAXAD INC
		DATE OF NAME CHANGE:	19740304
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>
<periodOfReport>2003-10-23</periodOfReport>
<notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0000062262</issuerCik>
        <issuerName>SUMMA INDUSTRIES/</issuerName>
        <issuerTradingSymbol>SUMX</issuerTradingSymbol>
</issuer>
<reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001252647</rptOwnerCik>
            <rptOwnerName>RIVERA MIRIAM C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3350 SHELBY STREET, SUITE 200</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ONTARIO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>91764</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector>
<isOfficer>1</isOfficer>
<isTenPercentOwner>0</isTenPercentOwner>
<isOther>0</isOther>
<officerTitle>Vice President</officerTitle>
<otherText></otherText>
</reportingOwnerRelationship>
</reportingOwner>
<nonDerivativeTable></nonDerivativeTable>
<derivativeTable><derivativeTransaction><securityTitle><value>Common Stock Option</value>
</securityTitle>
<conversionOrExercisePrice><value>7.495</value>
</conversionOrExercisePrice>
<transactionDate><value>2003-10-23</value>
</transactionDate>
<transactionCoding><transactionFormType>4</transactionFormType>
<transactionCode>A</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionAmounts><transactionShares><value>5000</value>
</transactionShares>
<transactionPricePerShare><value>0</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode><value>A</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<exerciseDate><footnoteId id="F1"></footnoteId>
</exerciseDate>
<expirationDate><value>2013-10-23</value>
</expirationDate>
<underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value>
</underlyingSecurityTitle>
<underlyingSecurityShares><value>5000</value>
</underlyingSecurityShares>
</underlyingSecurity>
<postTransactionAmounts><sharesOwnedFollowingTransaction><value>25500</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature><directOrIndirectOwnership><value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</derivativeTransaction>
</derivativeTable>
<footnotes><footnote id="F1">Becomes exercisable in one-fourth increments annually.</footnote>
</footnotes>
<ownerSignature><signatureName>Miriam C. Rivera</signatureName>
<signatureDate>2003-10-23</signatureDate>
</ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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