Kool Seal, 5 Gallon, Blue To White Elastomeric Roof Coating, Color Changing Acrylic Finish Coat That Provides A Highly Reflective Finish To Lower Interior Temperatures & Reduce Energy Costs, Formulated With Snow Roof Technology For Easy Coverage, Will Transition To Bright White When Drying, Usually Within 24 Hours, Transition Time Will Depend On Environmental Conditions & Amount Of Sunlight, Excellent Waterproofing Capabilities.