DAP Barrier Multi-purpose gun foam is proven to offer complete 4X protection for homes. The All Seasons Formula Blocks Air, Water, Mice/Pests and Fire. Plus, the reusable adapter and extra straw provide more projects per can and less waste. Great for small & large gaps, window & door sealing, pest entry points and fire blocking penetrations. Meets ASTM E84/UL 723, Class 1 Fire Rated, UL Classified.