Which type of material is typically used for firestop seals?

Firestop sealant material is specifically designed for the purpose of creating a barrier to prevent the spread of fire and smoke through openings and gaps in walls, floors, and ceilings. This type of material is formulated to withstand high temperatures and to expand when exposed to fire, sealing off voids to help maintain the integrity of fire-rated assemblies.

Unlike plastic sheeting, which does not provide the necessary fire-resistance properties, firestop sealants are tested and rated for their ability to perform during a fire situation. Similarly, while metal barriers can be effective at blocking physical openings, they do not have the same chemical properties required for sealing against fire and smoke penetration effectively. Acoustic foam, on the other hand, is intended primarily for soundproofing and does not provide reliable fire resistance. Therefore, firestop sealant material stands out as the appropriate choice for ensuring safety against fire hazards in construction and building maintenance.