White Lightning Products 9650 Pro Value Siliconized Acrylic Latex Caulk, Bright White This product adds a great value Features a paintable formula, good flexibility and adhesion Specially formulated to meet the high-production needs of professional Painters and contractors For use on interior and exterior doors and windows, baseboards, siding, tubs, sinks and showers. Provides a smooth, professional application with excellent flexibility and elasticity. Cured caulk is mildew and rust resistant. Ideal for filling joints and openings around doors, windows, baseboards, trim, siding and vents.