Tectaloy Coolant Concentrates Concentrated coolants using Organic Acid Technology (OAT). Type A Coolants. Contains 1065gm/litre ethylene glycol concentrate. Suitable for both petrol and diesel vehicles. The unique formula allows extra radiator cooling system protection when required, such as four-wheel driving, towing heavy trailers or caravans. 10 years or 1,000,000 km. -37°C Anti-Freeze Protection. +139°C Anti Boil Protection.