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.
|Fire resistance||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|