A firestop is a fire breakout protection framework made of different segments utilized to seal openings and joints in a blaze-resistant rated divider.

Firestops are planned to restore the fire-safety ratings of partitions or flooring by blocking the spread of flames by filling the openings with flame resistant materials. Unprotected openings in partitions counteract the fire safety ratings of the fire walls, permitting the spread of blaze, ordinarily past the points of confinement of the fire security design of a structure.