Cafco SPRAYFILM® WB3 is a water based intumescent coating consisting of polyvinyl acetate resins and fillers for the fire protection of structural steel. It is preferably spray applied with airless paint equipment for speed and quality of finish. Brush and roller application is also possible.

Cafco SPRAYFILM® WB3 can be sealed and protected with a decorative top coat. Cafco SPRAYFILM® WB3 is applied directly to the contour of primed I and H section columns, angles, channels and beams and both square and circular hollow sections, to provide fire protection for up to 120 minutes. In a fire, a chemical reaction takes place causing the Cafco SPRAYFILM® WB3 to expand and form an insulating layer which slows the temperature of the steel rising to a critical level.


  • Provides fire resistance for up to 120 minutes in accordance with BS 476: Part 21 and up to 180 minutes in accordance with ASTM E119, NFPA 251, AS 1530: Part 4 and AS 4100
  • Durable and decorative finish
  • Steelwork may be left exposed to view
  • Chemical and abuse resistant
  • Can be top coated to match surroundings
  • Easy application and clean up with water
  • Fast drying time.


Structural steel column and beam coating fire protection for building and construction industries. For the complete information of substrate preparation prior to applying Cafco SPRAYFILM® WB3 product, installation methods, fire protection thicknesses, application limitations etc, please contact Promat for the Cafco SPRAYFILM® WB3 application guide