Alex Plus acrylic latex caulk plus silicone is a professional-quality caulking product formulated to last, It is an all-purpose adhesive caulk ideal for a wide variety of applications for interior and exterior use, Alex Plus contains silicone, which allows for excellent adhesion and flexibility to resist expansion and contraction without cracking, it provides a waterproof seal and prevents air and moisture from passing through cracks and joints thereby improving energy efficiency, cured caulk is mildew-resistant, Alex Plus is paintable with latex and oil-based paints, it is easy-to-use, easy to tool, low in odor, cleans up easily with soap and water and has a low-VOC content.