Boss Polyurethane Foam Sealant is a ready-to-use, multi-purpose, polyurethane foam that expands to three times its original volume on contact with air. The expanding action fills holes, cracks and gaps more completely than standard caulks. BOSS® 333 has excellent insulating properties and superb adhesion to virtually all building materials.
Features:
- Meets CA-25-4
- UL Classified, Tested to ASTM E-84
- Triple Expanding
- Weatherproofs against wind and moisture
- Fills gaps, cracks and holes
- Seals out insects and pests
- Can be sanded, painted and stained
- Complies with EPA Method 24 and California
- Air Resource Board Method 310
- VOC Compliant
Uses:
- Air Sealing
- Partition walls with ceilings
- Through penetrations around cables and pipes
- Seams between chimneys, roof protection, roof panels and wall panels