Non-toxic coolant based on propylene glycol and appropriate corrosion inhibitors. It protects cooling systems from freezing in winter and from boiling in the summer period up to 2 years. The antifreeze concentrate is diluted with distilled water to the desired freezing point. Due to its non-toxicity, it is used in the systems for the preparation of sanitary water, solar and central systems as well as in the food industry: breweries, dairies, meat plant, refrigerators, juice factories.