White-Seal Plus is a thick, high performance 100% acrylic elastomeric roof sealer. The fiber-reinforced formula is designed to promote stronger adhesion to surfaces such as RV roofs. It provides a full waterproof and weatherproof seal adhering tightly to many surfaces without a primer. The product’s blue color attracts heat, causing it to dry in half the time of a regular sealer product. It turns to ultra-white after it is exposed to sun light.