Heat Shrink Butt Crimp Connectors Mixed with Solder Seal Wire Connectors (210 Pcs)WATERPROOF Polyamide hot melt adhesive provides excellent waterproof property, can be ideal used in marine and automobile applications. DURABLE Excellent stretch and mechanical damage resistance; Ideally translucent provides tensile strength; High elasticity keeps steady performance. USAGE For best results use a hot air gun until it reduces in size and the adhesive flows, filling gaps within the terminal.