this product is mainly composed of poly enzyme grade glycol, high purity water, polymer corrosion inhibitor, anti-foaming agent, coloring agent, etc. it has good stability and helps to make the hydrogen fuel cell operate in a suitable temperature range to prevent it from overcooling or overheating which affects the reaction and discharge efficiency, while its extremely low conductivity can prevent the membrane electrode from short-circuiting and damaging the cell, and can protect many kinds of metal parts in the whole cooling system of the cell from corrosion, scale and frost damage.