Pre-wash with Hot water ( 50 degrees C) is helpful before cleaning with SEA Voyage Tank CLEAN. This trick will help to remove excess of oil contaminates and also hot water releasing bond between metal and oil contamination. But never follow this step for crude oil, drying and semi-drying oils as these products can reverse cleaning effect with hot water. In this case, prewash with cold water should be applied to remove excess of oil from tank and metal surface area.
Oil Emulsifier based cleaner is best option to clean the Oily Tanks... To know more details about Tank Cleaning chemicals, mail us : mail@rxmarine.com