The first and only test strip designed for all heavy-duty coolant types. A quick and effective way to test your cooling system in both conventional and extended life coolant. For use in all heavy-duty coolant types, including extended life coolant. Effectively tests freeze point of conventional and extended life coolants. Tests for contamination and chemical protection in extended life coolant. Accurately tests SCA (nitrite) concentrations in conventional coolants. Quick and accurate results in minutes.