Liqui moly 1641 ceramic rust solvent with freeze shock 300ml liqui moly 1641 p this ceramic rust solvent with freeze shock 300ml from liqui moly has been designed with ultra high penetration properties combined with a lubricating effect of the ceramic particles free parts wich are rusted solid this effect is promoted and accelerated further by the freezing effect which shrinks metal components to be loosened p p ideal for rusted solid and corroded metal parts such as screws bolts pin