TYVA2AGFR12 Fire retardant – Suitable for all building types – Exceptional tear and tensile strength characteristics – CE Marked Tyvek Fire Rated AirGuard provides airtightness and vapour control when installed correctly making sure all laps, junctions and penetrations are sealed. In order to create a full ‘fire-safe’ system it must be used in conjunction with AirGuard FR system tape.