DAP Silicone Max All Purpose is a 100% silicone sealant that provides maximum flexibility and adhesion to withstand extreme expansion and contraction caused by temperature and weather fluctuations. It has twice the joint movement capability of many other sealants. It won't crack or shrink, providing a durable, 100% waterproof and weatherproof seal. It is rain and water ready in just 30 minutes and is ideal for a wide variety of applications such as caulking and sealing around windows, doors, siding and trim. Silicone Max meets ASTM C920, Class 50, for exterior/interior use. DAP caulk and sealants provide durable performance for a variety of projects.