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.
Steel structures protected with Cafco SPRAYFILM® WB3 have undergone fire resistance tests up to 120 minutes in approved independent laboratories to recognised standards throughout the world, including:
Fire resistance test results are assessed in accordance with ASFP “Fire protection for structural steel in buildings” procedures. If UL certification is required, please consult Promat.
|Surface burning (ASTM E84: 1998)||Flame spread 5, smoke development 35|
|Alkalinity||pH||8.0 ± 0.2 at 25°C|
|Theoretical coverage||Approximately 18.79m² per container at 0.7mm DFT|
|Practical coverage||Dependent on surface texture, substrate, application method and technique.|
|Number of coats||One or more as required|
|Maximum thickness (WFT) per coat||mm||1.6 using spray 0.76 using brush For airless spraying, several thin coats as opposed to one heavy coat will give greater control over finish and thickness.|
|Cure||By air drying|
|Initial set at 20°C, 50% RH and 0.4mm WFT||Approximately 6 hours|
|Solids by weight||70% ± 2%|
|Impact resistance (ASTM D2794: 1993-2010)||kg/m||18|
|Durometer hardness (ASTM D2240: 2005-2010)||80 shore D|
|Abrasion resistance at 1000 cycles (ASTM D4060: 1995)||g||0.6505|
|Colour and texture condition||White with a flat matt finish|