The Great StuFF PRO Joint offers contractors a better way to improve the air seal between a framing lumber and drywall, a common area for leaks, increasing energy loss by up to 40%. of a house. Great Stuff Pro Drywall Gasket is the first water-based foam in the Great StuFF Pro family of insulating foam sealants. How it works: Great StuFF PRO Gasket is a one component foam applied to the face of top plate, bottom plate and around the perimeter of all rough openings. Drywall is typically installed over the Great Stuff Joint creating a joint that seals the building airtight. Unlike polyurethane-based Great Stuff Pro Insulating Foam Sealants, Great Stuff Pro Drywall Joint cures to a flexible, compressible foam that conforms perfectly to create a tightly sealed home and allows for consistent drywall installation. . It does not expand, which reduces the arch of drywall. The flexibility of the cured joint allows heavy drywall to slide up the wall frame without the joint tearing or coming loose. Under normal conditions of 70°F/50% relative humidity, gypsum board can be installed after 6 hours of drying.