Polywater FST-250 Foam Duct Sealant

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Polywater FST-250 Foam Duct Sealant

American Polywater Corporation

Polywater FST-250 Foam Duct Sealant is a specification grade, two-part, high-expansion foam duct sealant.  It keeps water, acids, dust, gases, insects, and rodents out of the duct.  FST™ Sealant expands and hardens to a “closed cell”, rigid structure.  It is both permanent and  removable. The foam expands and cures quickly, even when water is present.

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