Seal the glass panel in your Hi-Flame Precision Inset (HF357i) door correctly with the Precision Inset Glass Seal. This 3mm self-adhesive high-temperature rope bonds directly to the frame, creating an airtight seal around the glass. A failed glass seal lets in air that disrupts the airwash and leaves the glass sooting up quickly. This genuine replacement spare is simple to fit and makes an immediate difference.