Firestop Products and Systems | 3M Designed to contain a fire for a rated amount of time. Firestop foam is rated as a system depending on how it is used, and is tested to ASTM E814 which is the "Standard Test Method for Fire Tests of Through-Penetration Fire Stops". Linked below are some common 3M systems for firestopping through-penetrations. C-AJ-0140 (PDF, 284 KB)