Fast Firestopping FoamEfficient and effective, 3M™ Fire Barrier Rated Foam FIP 1-Step is a two-part urethane, smoke, sound and firestopping foam. This intumescent foam is engineered to expand in the event of a fire. It is firestop tested up to 2 hours in accordance with ASTM E 814 (UL 1479) and CAN/ULC S115. When dispensed, this foam cures quickly, reaching full expansion after approximately 2 minutes and expanding up to 5 times its size. This product foams in place without sagging or running and is designed to fill the void between the through penetrant (pipe, cable, etc.) and the wall, creating a firestop seal and restoring the fire rating of the entire wall. We formulated this foam to be re-enterable and repairable, remaining pliable after installation for the easy installation of new cables/conduit in existing openings.Recommended ApplicationsBlank openingsMetal pipeCablesCable trayInsulated pipeCombination penetrationsSustains a Tight Seal3M™ Fire Barrier Rated Foam FIP 1-Step offers excellent adhesion and can be installed in wall or floor applications with no backing material, eliminating the need for mineral wool and caulk. This firestop foam bonds to most construction substrates, including but not limited to, concrete, metal, wood, plastic and cable jacketing. This product is paintable with primer. During a fire, this product maintains a tight firestop against smoke and flame and its air leakage is less than 1 CFM/Sq Ft. 3M™ Fire Barrier Rated Foam FIP 1-Step meets the intent of LEED VOC regulations and is