DEGRASOL SUMMER COOLANT GLYCOL PLUS is a top up solution and has been developed to protect car, truck and bus engines of both ferrous and aluminium construction and frost damage. DEGRASOL SUMMER COOLANT GLYCOL PLUS is based on monoethylene glycol and contains a blend of inhibitors designed to give a high degree of corrosion protection to the metals usually found in engine cooling systems. It is a phosphate free antifreeze and contains no methanol.