Bostik silicone caulk sealants are renowned for their exceptional resistance to aging, weathering, mold, radiation, fire, water, and volatile chemicals. This incredible durability now comes together with just the right colors to match your favorite Bostik grout and provide a perfect finish. Available in a variety of colors, our silicone caulk offers elastic properties to suit your needs. And unlike other sealants with high levels of flexibility, our silicone formulations don’t compromise on durability. Boasting exceptional resistance to extreme temperatures, corrosive fluids, and anything else life throws at it.