1 - 50-mL cartridge; 2 - mixing nozzles; 6 - foam discs; 2 - pairs of gloves; 1 - instruction sheet. Protects Conduit and Raceway SystemsFST™ closed-cell sealant provides superior pressure-blocking in the toughest environments. It stops water, methane, and other gases to keep electrical systems intact. FST Duct Sealant is durable and easy to install. FST is chemically resistant and has excellent adhesion to conduits.