Pre-coating service on fastener, including locking, sealing, preventing adhesion of weld spatter, reducing torque scatter, lubricating, pre-assembling, anti-rust, anti-chipping, insulation and so on. Together with the rapid changing technology of surface treatment, pre-applied adhesive needs to work with many different surface treatments, to meet the increasing requirement for the salt spray capability, TSLG uses professional, customized technology; provides the valued solution to the industry.