Features: 1) Antifreezing fluid (SH0521-1999) shows an excellent performance of anti freezing to protect automobiles from cooling agent freezing and cracking of engines, engines\'\' body and radiators with auto parked in cold weather, which also shows characteristics of relatively high boiling point (up to min. 106oC) to effectively avoid boiling of engines 2) In addition, it works well against corrosion and oxidation of engines\'\' cooling system with an excellent performance of protecting the parts made of copper, steel, cast iron, iron and soldering tin 3) The high quality of deionized water is adopted in production of the fluid, so that water scales are effectively avoided and engines\'\' life are prolonged with engines\'\' efficiency secured