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Intumescent Letterbox System

Intumescent Letterbox System
Part no: IAFLBLB60
Retail Price: £10.29
Our price: £6.17 + vat (£7.40 inc. vat)
Available: In Stock
Delivery: FREE UK-wide Delivery
Next working day if ordered before 2pm
The Intumescent Letter Box System that we offer is very popular, consisting of high performance and self-adhesive backed PVC laminated intumescent substance, which has undergone custom-designing to line letterbox apertures in fire-resistant doors.

When exposed to fire, the liner rapidly expands (intumesces) in order to seal the aperture and thereby stopping fire, hot gases and smoke from spreading through the door. The liner is tested independently as per BS476: Part 22: 1987 and is able to provide fire resistance for more than 1 hour.

Our intumescent letterbox system comes in easy-to-install, NHBC type approval packs with sufficient material which suits any size aperture ranging up to 270x69mm, used in fire door assemblies targeting ½ and 1 hour resistance. The liner colours are brown & red and letter plate brass and satin aluminium substance.
  • Choice of colours and letterplates
  • Self adhesive backed
  • Easy to install
  • NHBC Type Approval
  • Will suit any size aperture up to 250 x 50mm