The old “stop, drop, and roll” routine and basic fire extinguisher skills are very useful, but if you’re trying to prevent flame and smoke from spreading through wall penetrations, neither will do you much good. What you really need is an intumescent filler material like Abesco‘s FP200 Fire-Rated Foam. This firestop-in-a-can fills in the gaps where cables or pipes pass through walls, ceilings, and floors, to maintain a tight seal that inhibits fire spread between rooms.
So how does it work? As I mentioned before, Abesco FP200 is intumescent, which means that it expands and forms a hard, impenetrable char when exposed to fire. This char has the ability to seal out flame, smoke, toxic fumes and water for up to 2 hours of fire exposure. The foam can be used to seal gaps in concrete, brick, wood, and metals like aluminum and steel, and its performance isn’t affected by humidity or moisture. As a matter of fact (and I think this is pretty fascinating), after application it actually cures (dries) upon being exposed to atmospheric humidity!
Abesco FP200 foam has been fire-rated according to the requirements of ASTM E-814 (UL 1479), contains no chlorofluorocarbons (CFCs), and is environmentally friendly.