Introduction

How Is Butyl Coated on Shaped Spacer Bar Or Without Butyl Extruding Machine?

Dual seal insulated glass is always composed of primary seal and secondary seal. Primary seal is butyl. It is usually packed in 7 kg drum. It is extruded and is applied on two sides of aluminium spacer bars by an expansive delicate butyl extruding machine. Now, there is an alternative, butyl tape. BST series butyl tape is a thin layer of butyl sealant which is already pre-extruded and wind with protective thin film in disc.