WT-103 is a clear, flat, matte, interior, fire-proof intumescent paint coating for raw wood. WT-103 works by creating a fire barricade, separating the ignition source from the wood, decreasing flame-spread. When properly applied, WT-103 complies with ASTM E84, Class B or Class 2, NFPA 255, UL No. 723, UBC 42.1 and more. WT-103 clear flat flame retardant is registered and approved by the CA State Fire Marshal as an interior clear flameproof coating. Suitable for application on raw wood. Coverage is 200 sq. ft./gallon in 2 coats. Applies milky white and dries clear. Can be applied with an airless sprayer, brush, or roller. Fireproof Paint, Flame Retardant Paint, Fire Retardant Paint. Color: Clear Matte.