Model Specification - FST

The statement below may be inserted into a customer specification to help maintain engineering standards and ensure work integrity

Duct sealant shall be Polywater FST™ Foam Sealant. Duct sealant shall be a 2-part, 98% closed-cell urethane foam. It shall react and set in 5-10 minutes at 70°F. It shall be capable of sealing 3/4"-10" conduits with multiple cable configurations. Duct sealant shall be reenterable. It shall be capable of withstanding temperatures from -40°F to 200°F; and be chemically resistant to gasoline, oils, dilute acids and bases. Duct sealant shall not affect the physical or electrical properties of wire and cable.

Duct sealant shall good adhesion to duct and cable jacket surfaces with good structural strength. It shall have 120-lb compressive strength (ASTM D1621). Duct sealant shall be capable of holding 22 ft. waterhead pressure continuous or 90 ft. waterhead pressure short-term. It shall block up to 5 psi gas or vapor continuous. It shall meet NEC codes for raceway seals, meet UL 94 fire rating HBF and be UL recognized.