Boss® 333 Triple Expanding Foam Sealant, Size: 12 oz., Aerosol Can, Tan, Insulation Value: R-4 to 5, -200 to 200°F Performance, Applications: For Insulating around Pipes, Cables and Blank Openings, Gaps and Cracks, Standards: ASTM E-84, UL 723
- A ready to use, multi-purpose, polyurethane foam that expands to three times its original volume upon contact with air
- Weatherproofs against wind and moisture
- Can be cut, sanded and painted