JOINT FILING AGREEMENT

The  undersigned  hereby agree that the statement on Schedule 13D/A with respect
to the shares of Common Stock of Viskase Companies,  Inc., is, and any amendment
thereto  signed by each of the  undersigned  shall  be,  filed on behalf of each
undersigned  pursuant to and in accordance with the provisions of 13d-1(k) under
the Securities Exchange Act of 1934, as amended.

Dated: December 22, 2000

KATANA FUND LLC
By: Katana Capital Advisors LLC, Manager
By: /s/ _______________________________________________

Steven L. Gevirtz, President

KATANA CAPITAL ADVISORS LLC
By: /s/ ______________________________________________

Steven L. Gevirtz, President
STEVEN L. GEVIRTZ
By: /s/ ______________________________________________

Steven L. Gevirtz