Intumescent Letterbox Kit

Designed for use in a fire rated door and maintains performance and integrity of the fire door with the use of intumescent materials. When exposed to heat, intumescent lining expands and fills aperture in door, preventing the passage of fire from one area to another.

Tested in accordance with BS476: Parts 20/22: 1987 and will provide fire resistance for more than 30 minutes.

Available as standard in a silver anodised finish.

Door thickness 44/55mm - letterbox height 70mm.