Synthetic fluid used for the filling of hydraulic brake system and hydraulic clutches with discs or drums, produced of mixture of polyglycol and antirust and anticorrosion additive. It very difficultly absorbs moisture from the air, therefore it has very high boiling point which prevents creation of steam plugs, which provides safe braking and prolongs life even in the most difficult exploitation conditions. It should not be used in brake systems where the manufacturer recommended use of mineral base fluids.