A Foam Duct-Sealing System for 2-inch/50-mm or Larger Conduits
FST™ closed-cell duct sealant provides superior pressure-blocking power in the toughest environments. It stops methane and other gases to keep electrical systems intact. FST Duct Sealant is stronger, more chemically resistant, and cures 50 times faster than open-cell aerosol foams. The FST seal has excellent adhesion to PVC, rigid steel, EMT, IMC, fiberglass and polyethylene conduits. FST is a proven solution that has been used for years to protect switchgear, panels, riser poles, combiner boxes, meters, and all types of electrical and telecommunication apparatus. It creates a semi-permanent seal and is reenterable.
- Polywater FST is recommended for 2-inch (51 mm) or larger conduits.
- It comes in a multi-use single-plunger caulking tube that uses a standard high-ratio caulking tool (TOOL-250).
- For conduits smaller than 1.5 inches, the Polywater FST-MINI is recommended (Polywater® FST-MINI-1G, Polywater® FST-MINI-B6, Polywater® FST-MINI-B6G)
- The kit packages come with all the components needed to complete a proper seal.
Specifications and Applications:
Application: FST-250 is recommended for 2-inch (50 mm) or larger conduits. It comes in a multi-use single-plunger caulking tube. FST MINI is recommended for conduits less than 1.5 inches (40 mm).
Adhesion: Bonds to PVC, GRS, EMT, IMC, fiberglass, and PE conduits. Ducts can be reentered.
Codes: FST meets the requirements of the NESC Section 322 B4 and NESC Section 355 D; and 2008, 2011, 2014, and 2017 NEC conduit sealing code requirement Articles 225.27, 230.8, 300.5 (G), 300.7 (A) on Raceway Seals, and 501.15 (B)(2).
Attention: Due to varying interpretations of the NEC code, please consult the AHJ before use in Class 1, Div 2 hazardous locations.