Great Stuff Pro™ Gasket is a one-component, water-based foam applied to the top plate, bottom plate and around the perimeter of all rough openings. Specially designed to create a flexible, compressible, air seal that will stay in place when drywall is installed. Unlike traditional polyurethane-based foam sealants, this water-based solution and the specially designed gun can be easily cleaned with a garden hose and the included cleanout adapter.* *Follow all directions for proper cleaning and disposal. Use only the special blue-handled Great Stuff Pro™ Gasket Dispensing Gun is to be used with Great Stuff Pro™ Gasket. Do not use other Great Stuff Pro™ products in this gun.