DRAFT STOP 812 is low pressure single component polyurethane foam designed to fill gaps between fenestration products and rough openings. The non-rigid, highly elastic foam has 30% joint movement capability which accommodates movement and settlement to maintain an airtight, weather-proof seal. It will provide an airtight seal and protect against water, air and sound intrusion. It is closed cell, minimal expanding foam which will not absorb water, warp or deflect window or door frames.
