Antifreeze for use in heating systems that use a hot plate heat exchanger or a calorifier. (fresh water storage tank) This type of system is now fitted to a lot of horse boxes, camper vans and motor homes. This is NOT the same kind of Antifreeze you would put in the engine of a vehicle.
This Antifreeze IS Propylene Glycol and NOT Ethylene Glycol. You must never use Ethylene Glycol where drinking and washing water is used.