Hangzhou Biyou Building Materials Technology Co.,Ltd specialized in manufacture a wide range of weather sealing system and passive fire products. Our products are idea for fire resistance, insulation, smoke sealing and acoustic suppression. We has a group of professional R & D, high-quality products and efficient after-sales service. We have achieved IS9000 certificate, BS/EN/UL Certificate approved by Intertek and other international testing institutions. Most of our products comply with requirements of BS476 part 20-22 and EN BS 1634-3, EN BS13501-2,UL 10C (2009).We have exporting to Europe ,American ,Asia, Middle East as well as other countries.

This is an acoustic,smoke astragal. Its proven design is affective in sealing the meeting stiles of plain or rebated double doors.Its aluminium trim neatly conceals the sealing portion of the seal and provides a secure weatherproof rebate stop.