White Lightning Silicone Ultra is a premium, 100% Silicone Sealant that is permanently flexible and scrubbable. It is extremely durable, water ready in three hours and will protect from damage caused by heat and water. White Lightning Silicone Ultra is commonly used on: countertops and splashboards, sinks, bathtubs, basins, showers and toilets. It is excellent for interior/exterior application on: glass, fiberglass, metal, wood, vinyl, masonry and many plastics.