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WF300 Intumescent Firestop Caulk

WF300 Intumescent Firestop Caulk is a latex-based firestop caulk designed for residential wood frame construction. WF300 Caulk is tested for addressing penetrations through wood/frame construction such as wood stud walls and floor/ceiling assemblies. Under fire exposure, WF300 expands to up to four times its original volume.

Test Standards

ASTM E814 (UL1479)

CAN/ULC S115

ASTM E84 (UL723)

ASTM E119 (ANSI/UL263)

Third Party Approvals
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Applications
Cables

Cables

Duct

Duct

Head of Wall

Head of Wall

Metal Pipe

Metal Pipe

Plastic Pipe

Plastic Pipe

Properties
Autobonding

Autobonding

Intumescent

Intumescent

Low VOC

Low VOC

Paintable

Paintable

Permanent

Permanent

Smoke Barrier

Smoke Barrier

STC Rating

STC Rating

Water Based

Water Based

Product Details

Features

  • Installer friendly, easily applies with standard caulking gun
  • Suitable for combustible and non-combustible penetrants
  • Tested for up to 3 Hours of fire exposure when tested to ASTM E814/UL1479
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