Tectaloy Ready-to-Use Unlimited Coolants Pre-Mix coolants using Organic Acid Technology (OAT). Type A Coolants. Pre-mixed to 33% 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 1,000,000km. -19°C Anti-Freeze Protection. +125°C Anti Boil Protection.