Constructed with heat shrink insulation that is adhesive lined to waterproof and environmentally seal electrical connections when crimped and heated. Insulates and protects connections from wire pullout, moisture intrusion and abrasionHeat-activated adhesive melts and flows to create a waterproof sealResists salt water, oil, gasoline and other environmental contaminantsRated at 600 Volt MaxTemperature Rating: -67 deg to 221 deg F (-55 deg to 105 deg C)2.5:1 Shrink Ratio