Plastic injection oven cleanser is a liquid corrosion preventative and cleanser for plastic machine tools. As a results of the additivies in its content, the raw material protects the screw from the rust owing to the inhibators come into being during the burn while the raw material clings. Due to its liquidity, it exudes to all parts and protects everywhere which are in danger of corrosion. During cleansing, the material creates foam so the limited volume in the cylindiric plastic injection screw, provokes a pressure rise in the plastic granule and screw by expanding. Owing to this feature of the cleanser, all the plastic granule raw material found on the edge or in the canal, is thrown out by this pressure.