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Intumescent Sleeves for Ventilation Ducting

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Intumescent sleeves to protect ventilation trunking passing though fire rated walls, ceilings and floors.

Size - length 100mm - 500mm 

Envirograf  Product 110

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Product Info

Envirograf Firoblok Intumescent Sleeves are designed to protect cables and metal/ plastic pipes and ventilation trunking passing through fire-rated ceilings, floors, or walls made from block, brick, or concrete, and hollow plasterboard floors and walls.

They are flexible, allowing contraction and expansion of water pipes, and give protection from corrosion caused by close contact with cement, cement blocks, plaster, and other corrosive building materials.

A silver-coloured reinforced covering contains the intumescent material so that it expands inwards and crushes into melting PVC pipes, trunking, ducts, etc in the heat of a fire.

They also absorb heat from fire and help prevent metal pipes, services, and armoured cables from overheating. They can be easily cut with a sharp knife and they should be installed level with the surrounding ceiling, floor, or wall.

Fire Performance

This product underwent a fire resistance test employing the general procedures and criteria of BS476 Part 22 (1987), achieving an integrity of 130 minutes in solid walls, 67 minutes in hollow walls, and 4 hours in concrete/ block ceilings / walls.

Also tested to EN1366-3 (2005), EN1363-1 (2000), and EN13501-2 (2004).

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