WF300 Intumescent Firestop Caulk
BlazeStop® 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.
- 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