Polywater FST Sealant is used to protect mission-critical electrical and telecommunication systems from water, gases, and other unwelcome intrusions. The closed-cell, foam sealant technology evenly flows around cables and in conduit space to create a strong bond. It expands and completely cures into a rigid, robust seal without relying on environmental moisture.

Polywater® FST™ foam closed cell duct sealant provides superior pressure-blocking in the toughest environments. It stops water, methane, and other gases and is durable and easy to install.

FST is chemically resistant and has excellent adhesion to conduits.

Reliable
Holds 22 ft (6.7 m) continuous water head pressure and up to 90 ft (27 m) surges

Versatile
Can seal conduits of all sizes and complex cable configurations

Re-enterable
Seal can be removed for future cable installations

Compatible
Use with a wide range of cable jacket and conduit materials

Meets Electrical Code Requirements
Creates airtight/watertight conduit seals and is fire retardant

Supplied in a case of 6 packs

Each pack contains

1 – 8.5-oz / 240-gm two-part FST™ Foam Sealant caulking tube (cat# FST-250)
3 – mixing nozzles
4 – 24-in / 61-cm 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
TOOL-250 NOT INCLUDED – SOLD SEPARATELY

Please see datasheets for further information