Fire stopping


Gypsum Fire Stopping for Walls and Floors (GFS 1000)

Gypsum Fire Stopping for Walls and Floors, GFS 1000, is a single pack factory controlled premix, based on gypsum plaster and vermiculite. GFS 1000 is designed specifically to stop the spread of smoke and fire through openings created in fire rated walls and floors.

Advantages of using GFS 1000

  • Easy to install; traditional skills are all that are required on site.
  • Seals apertures around penetrating services, irrespective of the degree of complexity within the opening, including: pipe work, cable trays, electrical and fibre optic cables, and ducting.
  • Openings to be fire stopped may be of any irregular shape and GFS 1000 easily facilitates localised removal and reinstatement where subsequent additional penetrations are required.
  • Suitable for use in return air plenums as, on completion of the fire stop, the surface may be trowelled smooth using conventional plastering techniques.
  • Suitable for sealing penetrations through a wide range of structures, such as concrete, brick and block work walls, and concrete floors.
  • Affords up to 4 hours fire resistance.

Acrylic Coated Slabs

Acrylic Coated Slabs are designed to prevent the passage of fire between compartment walls and floors, while allowing for the easy installation of services. The product is tested to BS 476 part 20/22, giving a fire and smoke barrier for 4 hours.

The Acrylic Coating is applied to both faces of a mineral fibreboard of minimum 160kg/m3 density. At normal temperatures, the Fire Batt installed with Mastic remains flexible to permit thermal and mechanical movements of the services. Both products are unaffected by oil, fungus, moisture, vermin or weather and contain no halogens or asbestos.

Advantages of using Acrylic Coated Slabs

  • Suitable for indoor use
  • Remain flexible to use fibre free mastic
  • Easy to use fibre mastic
  • Long life and easy to use
  • Suitable for large openings in walls and floors with additional supports

Acrylic Specification

Coating Thickness (WFT): 2mm Nominal


Installation details and technical support are available from ?

  • Use rubber gloves and protection to avoid skin and eye contact
  • Cut board to suit the opening
  • Apply Mastic to cut surface and mating substrate
  • Assemble board into opening
  • Apply Mastic from cartridge to close any visible opening
  • Maintain record of installation


Fire Batt and Mastic are manufactured in the EU, meeting the highest quality standard in compliance with ISO EN 9001.

Storage & Disposal

Fire Batt is not affected by the outdoor environment. However, for long-term storage and ease of installation, it is recommended that it should be stored indoors, in dry conditions. Ideal storage temperature: – 5 - 30°C.

Mastic shelf life is 12 months from date of manufacture.