Buildup of sludge and carbon lumps develops in hot-oil systems and can hamper performance over time affecting machine efficiency, but a new cleaning liquid is said to break up clumps and improve fluid flow. Paratherm SC can reportedly restore performance in less than a day, and it?s compatible with any mineral-oil-based thermal fluid, as well as many synthetic substances. Paratherm SC can operate at ambient temperatures or be heated to 150F to clean systems more quickly. Cleaning fluid that?s been used can be mixed with other washing liquids and then disposed of conventionally. Paratherm SC is available in 5- or 55-gal quantities.