Fotag 100 Pcs Heat Shrink Insulated Assorted Female & Male Bullet Butt Connector Electrical Crimp Wire Terminals 0.5-1.5mm&sup2; 22-16AWG 100% Brand new high quality insulated crimp terminals Allows visual inspection, prevents corrosion, and provided a waterproof seal Use a hot air gun until it reduces in size and the adhesive flows, filling gaps within the terminal.