Petroleum solvent-based compound which prevents corrosion. It gives heavy-duty, thick film protection in outdoor conditions.LOCTITE PC 9660 (known as MAXI-COAT) is a dark brown petroleum solvent-based compound which prevents corrosion. It gives heavy-duty, thick film protection in outdoor conditions. It doesn't melt in direct sunlight and withstands salt spray as well as other severe corrosion environments. Typical applications include use as a non-splattering chain lube and a rust inhibitor for machinery.