​Fire-resistant mortar is a crucial component in passive fire protection, designed to seal openings in walls and floors, thereby preventing the spread of fire, smoke, and heat through service penetrations. In the UK, its application is governed by stringent building regulations to ensure structural integrity and occupant safety.

What Is Fire Mortar?

Fire mortar is a specially formulated compound that, when mixed with water, becomes a trowelable or pourable material. It’s used to seal gaps around pipes, cables, and ducts that penetrate fire-rated walls and floors. Once cured, it forms a robust, non-combustible barrier that restores the fire-resistance rating of the structure.