KOUDX absobents can absorb industrial liquids leaks, drips or spills in your workplace, such as oils, coolants, solvents and chemicals. Use it under machines, for maintenance and repairs, to soak up overspray, line workbenches and a zillion other ways. Absorbents different colour: 1)White for oil >> oil or oil-based liquids,it only absorb oil and repel water.It also makes them great for skimming applications on water. They're ideal for transformer oil, vehicle fluids, grease, petroleum, oil-based solvents and more. 2)Yellow for chemical >> Hazardous chemicals like sulfuric acid, hydrochloric acid or sodium hydroxide. 3)Grey for universal >> It absorbs pretty much anything grease, lubricant, antifreeze, hydraulic fluid,etc.