Description
DAP® DRAFTSTOP® 812 is a low pressure, one-component gun grade foam specially designed to fill gaps between fenestration products and rough openings. This expanding polyurethane foam is designed to air seal without exerting pressure that can be detrimental to window or door frame stability. It provides an airtight seal. The non-rigid, highly elastic foam has 30% joint movement capability which accommodates movement and settlement to maintain an airtight seal. It is closed cell, minimally expanding foam. It absorbs virtually no water and will not warp or deflect window or door frames. The result is an air-tight seal around windows and doors.