Fire Protection Compound for Pipe Penetration Sealing | London Underground Approved

Fire Protection Compound for Pipe Penetration Sealing | QF4

QF4 Fire Protection Compound is a London Underground Approved, pre-mixed inorganic powder suitable for adding to water to produce a mortar which is intended for use as a gap filling material where non-combustible pipes and ducts penetrate fire compartment floors and walls.

Name: Fire Protection Compound for Pipe Penetration Sealing | LUL


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Features & Benefits

  • Approved for use on the London Underground
  • London Underground Product ID: 2425
  • Fire tested to BS476: Part 20: 1987
  • Up to 4 hour fire rating
  • The use of extensive shuttering is not necessary

Product Information


QF4 Fire Protection Compound is a non-combustible compound manufactured from lightweight aggregates, inorganic binders and gypsum cement.


QF4 Fire Protection Compound is expected to last the lifetime of the service installation.


One Square metre at 160mm thickness requires approx. 13 x 25kg sacks of QF4 and will provide a 4 hour rated fire seal.

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Standards & Approvals

Building Regulations impose limitations on all services penetrating fire compartment walls and floors. QF4 Fire Protection Compound has been tested in accordance with BS476: Part 20: 1987 The tests were conducted on a fire compartment wall penetrated by a variety of services which included galvanised sheet metal duct and iron pipes, all pointed up in QF4 Fire Protection Compound to a thickness of 160mm. Results demonstrated that the integrity and insulation values of QF4 were retained for 4 hours.

Installation Information

Cured and dried, it is light grey in appearance with a solid finished similar to concrete.

During application QF4 Fire Protection Compound is easily workable, and can be built up on flat surfaces without slumping. It can also be pumped into wall penetrations without the need for temporary formwork.

Where there is likely to be movement in pipes or ducts, wrap round 5-10mm mineral or ceramic wool.

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QF4 Fire Protection Compound - Technical Documentation