Polywater® FST-250KIT1 Foam Duct Sealant


Typical Lead Time 7-10 days

SKU: FST-250KIT1 Categories: ,


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 smaller conduits the Polywater FST MINI is recommended (see sidebar). The kit packages come with all the components needed to complete a proper seal.

FST-250KIT1 includes:

  • 1 – 8.5-oz two-part FST Foam Sealant caulking tube (cat# FST-250)
  • 3 – mixing nozzles
  • 4 – 24″ foam damming strips (cat# FST-DAM)
  • 1 – 12″ abrasive strip
  • 1 – pair disposable gloves
  • 1 – positioning rod for foam dam
  • 1 – pre-treating wipe (cat# HP-P158ID)
  • 1 – resealing cap
  • 1 – instruction sheet

Additional information

Weight3 lbs
Dimensions12 × 8 × 4 in