White Lightning Bolt Quick Dry is a durable caulk that makes quick work of interior and exterior caulking projects. This Quick Dry formula can be painted in 30 minutes, keeping even the most time sensitive projects on track. Ideal for filling joints and openings around doors, windows, baseboards, trim, siding and vents. For use on: Wood, drywall, metal, glass and masonry. Cured caulk is mold & mildew resistant. Flexible & crack resistant. Water clean-up.