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.