Rust Preventive Engine Coolant is a cooling system for engines that not only reduces the excess heat but also prevents rust and scaling of the metal. The Engine Coolant, comes under the brand name "Donex Coolant" can be availed in both concentrated and ready to use packs. The Engine Coolant is an economical coolant that lowers the operational cost and prolongs engine life. The Rust Preventive Engine Coolant is easy to use and provide high efficiency.