Intumescent Letter Box Kit

• NHBC and LANTAC building control approval
• Designed for use in a fire rated door
• Suits new or retro-fit use
• Easy to install
• Maintains performance and integrity of a fire door with the use of intumescent materials
• When exposed to heat, intumescent lining expands and fills aperture in door preventing 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
•  Sliver anodized finish as standard

Description

Consists of a high performance, self adhesive backed, PVC laminated intumescent material which has been designed to line the aperture of letterboxes in fire resistant doors. On exposure to a fire the liner will rapidly expand (intumesce) to seal the aperture and stop the spread of fire, smoke and hot gases through the door. The liner has been independently tested in accordance with BS476: Part 22: 1987 and provides in excess of 30 minutes fire resistance.

Internal Dimensions

• Regular Version (Width x Depth): 241x57mm
• Large Version (Width x Depth): 274x57mm