Heavy Duty Polyurethane Sealant for Refrigerated Cargo Bodies
Heavy Duty Polyurethane Sealant for Refrigerated Cargo Bodies Choosing the right heavy duty polyurethane sealant for refrigerated cargo bodies is not a glamorous decision, but it is a critical one. A reefer trailer or insulated box truck lives a hard life. It vibrates on highways, flexes through temperature swings from -30°C to 60°C, and gets washed with aggressive chemicals. If the sealant fails, you get thermal bridging, moisture ingress, and eventually rotting panels. The cost of that failure is far higher than the price of the sealant. Traditional approaches often fall short. General-purpose adhesives lack the flexibility to handle thermal expansion. Cheap acrylics harden and crack. Silicones resist moisture but offer almost no structural strength. What you need is a two-component or moisture-cure polyurethane formulated specifically for sandwich panel construction. This guide walks you through the selection criteria, application steps, and common pitfalls when working with a he...