Intumescent Letter Box Liner (Product 50 ) Fire Door Upgrades Classes 0 & 1 (Spread

Classes 0 & 1 (Spread of Flame)

Intumescent material will extinguish the fire

Then adhered to the surface of metal windows via the self-adhesive backing

For fire safety equipment that truly elevates its environment

Intumescent Letter Box Liner (Product 50 ) Fire Door Upgrades Classes 0 & 1 (SpreadIntumescent liners for improving the fire rating of existing letter box apertures. An intumescent liner for letter box. This product comprises of two adhesive L shaped sections with self adhesive backing for fixing. For mail apertures in fire doors where letter flaps already exist. Aperture sizes up to the limit for each type (LBL1 and LBL2) adjust the liners by cutting with a sharp knife as required. Seal any bare wood apertures with paint or wood