ROOF COATING ACRYLIC/ELASTOMERIC BLU2WHITE | Kool Seal Blu2white elastomeric roof coating is a color changing acrylic finish coat that provides a highly reflective finish to lower interior temperatures and reduce energy costs. This product is formulated with SnowRoof technology for easy coverage Blu2White coating is blue in color during application and will transition to bright white when drying, usually within 24 hr. Transition time will depend on environmental conditions and amount of sunlight. Kool Seal Blu2White coating provides excellent waterproofing capabilities.