Water, salt, dirt, chemicals-trailer wiring harnesses and pigtails are exposed to all of them, leading to weak and unstable connections. Grote’s Ultra-Seal connection sealant is designed to create a non-conductive, encapsulating physical barrier around the wiring harness. Ultra-Seal has been formulated to increase adhesion to the electrical connection, and its non-conductivity dielectric rating is 25 per cent higher than the leading competitor. Ultra-Seal is available in four-ounce tubes (99170) and eight-ounce tubs (99180).