A firestop or fire-stopping is a form of passive fire protection that is used to seal around openings and between joints in a fire-resistance-rated wall or floor assembly.

Is FireStop one word?

fire•stop (fī^ər′stop′), n. Buildingany object built into a building frame to block a concealed hollow space through which a fire might pass from one part of the building to another.

Is cease fire one or two words?

Word forms: ceasefires

They have agreed to a ceasefire after three years of conflict.