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 FRL 120/-/- in accordance with AS1530.4: 2014 & AS4100. 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.

Further Information


  • Fire protection of steel structures.


  • Low VOC for Green Star Buildings
  • Single application for lower FRL's
  • Water based for easy cleanup
  • On or off site application
  • Can be applied over many different types of primer

Curing time: 7 d
Density (g/cm³): 1.36 g/cm³
Drying time: 6 h
Application temperature: 5 °C
Application temperature Max: 38 °C
Solid content: 71 %
Viscosity (cps): 42000 cps
Colour: White
Shelf life: 10 months
Storage conditions: Storage Temperature 10ºC : 38ºC. Must protect from freezing and excessive heat. Store in a dry environment.
Transport temperature: 5 °C
Transport temperature Max: 40 °C

Please note
All physical and mechanical values are averages based on standard production and tested according to internal procedures. The typical values are given for guidance. The figures can change dependent on the test methods used. If a particular value is of prime importance for a specification, please consult Promat Technical Department.


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