It does not damage rubber hoses, metal parts and seals. Suitable for all aluminum, plastic and steel refrigeration systems in petrol, diesel and LPG engines. It is compatible with water, coolant and conventional antifreeze. It is designed to effectively clean all cooling system and improve heat transfer from motor to cooling system. Removes mud, rust, lime and other debris. Prevents overheating. Prevents accumulation of acid and pollution. It is acid-free and non-toxic.