STI 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 by-products
STI WF300 Caulk is suitable for through-penetrations and gaps in wood frame construction.
STI 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.
- Economical – delivers maximum fire protection at the right price
- Water-Based – easy installation, clean-up and disposal
- Water-Resistant – will not re-emulsify
- Intumescent – expansion fills gaps or voids caused by wood shrinkage, or burning or melting of combustible materials
- Meets ASTM E814 (ANSI/UL 1479)
- Acoustically tested – reduces noise transmission.
