FS20 Firestop Compound 2017-05-18T21:47:21+00:00

FS20 Firestop Compound

Refer to our downloads page for complete technical information.FS20_mortar_bag_small

FS20 Firestop Compound is used to provide a fire rated seal around service penetrations in fire rated walls and floors. Tested in accordance with BS 476:Part 22, FS20 Firestop Compound provides up to 4 hours Fire Protection.

General benefits:

• Smoke seal
• Good acoustic insulation
• Simple installation
• Load bearing seal
• Suitable for sealing around most types of service penetrations
• Unaffected by humidity
• Maintenance free
• No smoke emission

Fire Rating

FS20 Firestop Compound will provide up to 4 hours fire protection (see technical data sheet for further details).


FS20 Firestop Compound will provide up to 51dB Weighted Sound Reduction Index (see technical data sheet for further details).FS20-Render


FS20 Firestop Compound is a specially formulated gypsum based mortar, which is mixed with water to be trowelled or poured around service penetrations.

In floors, FS permanent shutter panel (50mm) (or similar formwork) is cut and friction fitted between services and the edges of the floor slab. Firestop Compound is then troweled over the shutter to a depth of 25mm thick. This is allowed to harden. The Firestop Compound is then mixed to a pouring grade and tops the seal up to the required depth.

Iapproval-logos-fire-security-systemsn walls, FS20 Firestop Compound is mixed into a stiff consistency for troweling into smaller openings. In larger openings, FS20 Firestop Compound can be cast into blocks which can be built into walls.

These are approximate calculations based on 22kg bags. The coverage does not take into account the percentage of the hole filled with services.


Install FS20 Firestop Compound to provide 1,2,3 or 4 hour fire rating to all service penetrations through all
fire rated walls and floors. Installation to be fully in accordance with manufacturer’s instructions.