DAP Dynaflex 800 Advanced All Weather Sealant was developed for professional siding, window and door installations. White sealant provides a durable, 100% waterproof and weatherproof seal. Its strong adhesion properties also make it ideal for use as a bedding sealant for window installation. Dynaflex 800 stays flexible, withstanding joint expansion caused by weather and temperature changes. It will not shrink, crack, crumble or break down. Dynaflex 800 can be applied to wet surfaces and in extreme temperatures. Fast dry formula is ready for paint or rain one hour after caulking. Exterior use, low in odor and VOC compliant. DAP caulk and sealants provide durable performance for a variety of projects.