DEF is required majority of heavy duty diesel vehicles. Diesel vehicles should be Euro IV & Vemissions limits and SCR equipped.

SCR is a technology that uses a Urea based diesel exhaust fluid known as DEF and a catalytic converter to significantly reduce oxides of nitrogen (NOx) emissions.

Diesel Exhaust Fluid (DEF) is one of the important solution involved in the SCR after treatment technology. Use of DEF to convert NOx into harmless nitrogen and water vapor. It is stable, colourless, odorless and meets acceptable international standards for purity and composition.

DEF designed specifically for modern integral Selective Catalytic Reduction (SCR) NOx reduction systems. The finished formulation is further to ensure maximum protection for internal SCR System components.

As per ISO 22241-3 standard, the selflife of DEF at constant temperatures up to 30°C is minimum 12 months at constant temperatures up to 35°C the self life is reduced to a minimum of 6 months. It is recommended that DEF should be stored out of direct sunlight and below 35°C. Where higher ambient temperatures are experienced, tank should be insulated or stored in shaded area. Minimum temperature is -11°C

It is not recommended. if you mix with other brand radiator coolants, it will affect the coolant performance.

The function of the Green coolant and the Red one Completely same.