LBL Fireproof Letter Box Liner

£12.32 £14.78 (inc. VAT)

Intumescent liners for improving the fire rating of existing letter box apertures.

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An intumescent liner for letter boxes. Comprising two adhesive L-shaped sections fitted into existing mail apertures, thus providing fire protection. Designed with adhesive backing for ease of fixing.

– Provides up to 68 minutes protection- Can be custom made to suit a range of aperture sizes
– Suitable for fitting to doors from 38mm to 70mm thick
– Liner can be easily cut to size to fit the opening


Tested to BS476 Part 22 1987, built into a composite door, maintaining the integrity of the door for 61 minutes.

Tested to European Standard EN1634-1 (2000), achieving 68 minutes protection

Technical Information
Application Instructions


Brand Envirograf
Weight 0.18kg
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