£39.60 (incl VAT)
An Intumescent liner to fit into the door aperture comprising two L-shaped sections fitted with self-adhesive backing for ease of fixing.
This product has been included in a fire test employing the general procedures and criteria of BS476 Part 22 1987, built into a composite door, maintaining the integrity of the door for 61 minutes.
Also tested to European Standard EN1634-1 (2000), achieving 68 minutes integrity
Envirograf Product 50
£15.40 (incl VAT)
About Intumescent Liner for Letterbox Openings in Doors
An intumescent liner comprising two L-shaped sections fitted with self-adhesive backing for ease of fixing. The liner can be cut to size with a sharp knife to fit the opening. Sizes to suit other openings can be made to order. It is used for mail apertures in fire doors, where existing letter flaps are to be used.
Standard opening sizes are 65mm x 290mm and 85mm x 340mm
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