Premium heavyweight pads absorb more, last longer and take less time to replace. Repels and floats on water while absorbing oils (petroleum based products). Also great for catching drips and soaking up spills. High tensile strength prevents the pad from falling apart when saturated. Standard melt-blown polypropylene is primarily used to clean-up marine-based oil spills. The fibrous texture grabs oil and repels water. Oil-based liquids actually adhere to the fibers.