Painter's Caulk is an acrylic latex caulk with a professional formula designed especially for easy paintability. It provides tight, waterproof seals and can be used indoors or outdoors on most common construction substrates. It takes all types of paint and cleans up easily with water. Cured caulk is mildew resistant. A general purpose Painter's Caulk formulated for interior or exterior use. Product provides good adhesion to most common building materials. Caulk should be painted with premium paint for best results.