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EXHIBIT 21
CLARCOR INC. SUBSIDIARIES
AS OF FEBRUARY 15, 2004
<Table>
<Caption>
JURISDICTION OF
INCORPORATION OR PERCENT OF
NAME ORGANIZATION OWNERSHIP*
- -------------------------------------- ---------------- ----------
CLARCOR Consumer Products, Inc. Delaware 100%
J.L. Clark, Inc. Delaware 100%
Clark Europe, Inc. Delaware 100%
CLARCOR Filtration Products, Inc. Delaware 100%
CLARCOR Air Filtration Products, Inc. Kentucky 100%
CLARCOR Total Filtration, Inc. Delaware 100%
Airklean Engineering Pte. Ltd. Singapore 100%
Airguard Asia Sdn. Bhd. Malaysia 100%
Baldwin Filters, Inc. Delaware 100%
Baldwin Filters N.V. Belgium 100%
Baldwin Filters Limited United Kingdom 100%
Baldwin South Africa, Inc. Delaware 100%
Baldwin-Unifil S.A. South Africa 80%
Hastings Filters Ltd. Canada Canada 100%
Baldwin Filters (Aust.) Pty. Limited Australia 100%
Baldwin-Weifang Filters Ltd. China 80%
CLARCOR UK Limited United Kingdom 100%
CLARCOR UK (Holdings) Ltd. United Kingdom 100%
Clark Filter, Inc. Delaware 100%
Filtros Baldwin de Mexico Mexico 90%
Purolator Facet, Inc. Delaware 100%
Facet FCE S.A.R.L. France 100%
Facet Iberica S.A. Spain 100%
Facet Industrial B.V. Netherlands 100%
Facet Industrial U.K. Limited United Kingdom 100%
Facet Italiana, S.p.A. Italy 100%
Facet USA Inc. Delaware 100%
Purolator Advanced Filtration Group,
Inc. Delaware 100%
GS Costa Mesa, Inc. Delaware 100%
Purolator Filter GmbH Germany 100%
Total Filtration Services, Inc. Ohio 100%
Total Filtration Services LLC of VC Mexico 100%
Total Filter Technology, Inc. Massachusetts 100%
United Air Specialists, Inc. Ohio 100%
United Air Specialists Ltd. UK United Kingdom 100%
CLARCOR International, Inc. Delaware 100%
CLARCOR Trading Company Delaware 100%
CLC Support Services, Inc. Delaware 100%
CLC Technologies, Inc. Delaware 100%
</Table>
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* Direct or indirect