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EXHIBIT 21
SUBSIDIARIES OF THE REGISTRANT
1. Elk Corporation of Dallas, a Delaware corporation, which owns all of the
outstanding stock of (a) Elk Corporation of America, a Nevada corporation,
(b) Elk Corporation of Alabama, a Delaware corporation, (c) Elk Corporation
of Texas, a Nevada corporation, and (d) Elk Corporation of Arkansas, an
Arkansas corporation.
2. Cybershield, Inc., a Delaware corporation, which owns all of the
outstanding stock of (a) Cybershield of Georgia, Inc. (formerly YDK
America, Inc.), a Georgia corporation, (b) Cybershield of Texas, Inc., a
Delaware corporation, and (c) Cybershield International, Inc., a Delaware
corporation.
3. Elcor Management Corporation, a Nevada corporation.
4. NELPA, Inc., a Nevada corporation.
5. Elcor Service Limited Partnership, a Texas limited partnership.
6. Chromium Corporation, a Delaware corporation.
7. OEL, LTD, d/b/a Ortloff Engineers, LTD, a Nevada corporation.
8. Ortloff de Venezuela, S.A., a Republic of Venezuela corporation.
