A premium stain blocking primer designed to coat over asphalt roofing products. This light gray base coat seals asphalt surfaces, so the top coating maintains color integrity and a brighter finish that delivers maximum reflectivity. Also, this high adhesion formula improves performance and coverage rates of roof coatings. Use prior to Black Jack ETERNA-KOTE silicone or Black Jack white elastomeric roof coatings. Waterbased technology is RainSafe in 2 hr, has low odor and easy cleanup.Use over asphalt roofingKeeps top coatings bright whiteUse with silicone or acrylic coatingsImproves coverage of top coat