White Lightning® – Optima™ is an interior and exterior premium hybrid sealant with exceptional adhesion and flexibility. It’s paintable and water-ready within 30 minutes and has excellent weather and UV resistance allowing it to be applied in extreme temperatures. It’s designed for both interior and exterior applications and is mold- and mildew-resistant when cured. Ideal for a variety of surfaces and substrates including aluminum, brick, ceramic tile, concrete, drywall, glass, marble, masonry, metal, plastics and vinyl siding. It’s available in white or clear, comes with a limited warranty, and is available at Sherwin-Williams stores nationwide.