Description

WF300 Caulk is a latex based, high solids firestop caulk. This material,  when properly installed, effectively seals penetration openings in wood frame construction against the spread of fire, smoke and combustion byproducts. WF300 Caulk is a single stage intumescent. When exposed to elevated temperatures, WF300 expands rapidly to seal off voids left by the burning or melting of combustible materials. WF300 Caulk is storage stable (when stored according to manufacturer’s recommendations) and will not separate or shrink when dried. WF300 adheres tenaciously to common construction materials such as lumber and gypsum board as well as typical penetrant materials.

WF300 Caulk is used to seal through penetrations and gaps in fire resistance rated wood frame construction such as floor/ceilings and walls or partitions. Most common penetrating items were successfully tested with WF300.

The firestopping sealant shall be a water-resistant, intumescent, latex sealant WF Firestop Caulk. The sealant when exposed to high heat or flame shall exhibit a free expansion of up to 5 times its original volume. The firestopping sealant shall contain no water soluble nor hygroscopic ingredients. The sealant shall be UL Certified and tested to the requirements of ASTM E814 (UL1479), CAN/ULC-S115 and shall meet Class A finish requirements when tested in accordance with ASTM E84 (UL723).

Key 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
• UL® GreenGuard Gold Certified