Fork Terminal Insulated offered by us, insulate the connection with a plastic and adhesive. After crimping or soldering the terminal, shrink the insulation around the wire with a torch or electric heat gun, and the glue within the insulation forms a moisture-resistant barrier. This has a standard diameter, acid & erosion control, and is safe to use. Fork Terminal Insulated is color-coded for use with different wire sizes and is available with a variety of stud sizes. This insulates well & not prone to aging.