The Terminals are Insulated with a 3:1 Duel Wall Polyolefin. An Adhesive Lining, Inside, Flows Under Applied Heat to form a Durable, Waterproof, Seal Against Water, Solvents and Chemicals. The Adhesive Lined Terminal Will Cover and Bond to Both the Connector and the Wire Insulation for Great Pullout Strength and Strain Relief. All the Terminals are Color Coded 22-8 AWG and are Transparent for Inspection. A Superior Line of Terminals to Protect Against Most Severe Conditions. Easy to Use, Just Crimp and Apply Heat.