QF4 Fire Protection Compound

Quelfire 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.

Next Day Delivery

Fast response to all enquiries

40 years of experience

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


Building Regulations impose limitations on all services penetrating fire compartment walls and floors.
Quelfire 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 Quelfire QF4 Fire Protection Compound to a thickness of 160mm. Results demonstrated that the integrity and insulation values of QF4 were retained for 4 hours.


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


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

Application / Installation

Quelfire QF4 may be used in all types of building and is compatible with most building materials. QF4 is simply added to clean water either in a bucket or a concrete mixer, mixed and poured or trowelled into position.

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


One Square metre at 160mm thickness requires approx. 8 x 40kg sacks of Quelfire QF4 and will provide a 4 hour rated fire seal.

Technical Support & Guidance

Should you require any further information regarding this product, please don’t hesitate to contact one of our specialists.