Shingle Seal™ is an application ready, water-based fire retardant designed for treatment of wood roofing and/or siding shingles. Shingle Seal™ is mix of proprietary ingredients, which forms a slight intumescent foam layer and carbon char when the treated shingle or shake is exposed to fire. Once the carbon char is formed there will be minimal flame propagation, smoke evolution or afterglow. The product is designed for exterior use. Under simulated test conditions of 200 inches of rain, Shingle Seal passed ASTM E-108 test series on Cedar Roof Shingles.