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.

These Acoustic and Smoke door corner seals are fitted in the rebate of a door frame to contain smoke, sound, draughts, dust and light. Strategically located in the impact free zone, the seal adheres to the frame quickly and easily without having to remove the door.