3M Fire Barrier Rated Foam, FIP 1-Step, 12.85 fl oz Cartridge Fire stop tested up to 2 hours in accordance with ASTM E 814 (UL 1479) and CAN/ULC S115 Meets the International Building Code for Passive Fire Protection Expands up to 5X when dispensed. One cartridge FIP 1-Step equals up to 6 tubes 10.1 oz caulk Intumescent. Expands in a fire Expansive UL systems for blank openings, metal pipe, cables, cable trays, combos, insulated pipe