Description
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.
TECHNICAL PROPERTIES
| 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. |
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|---|---|---|
| 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 | |
| Density | kg/litre | 1.33 |
| 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 | |
