PIG Skimmer Oil-Only Absorbent Sock absorbs oil from chemical baths in open-top dip tanks. Tough, chemical-resistant polypropylene skin and filler absorb oils but repel water-based liquids. Tough enough for acid baths and phosphates tanks. Ideal for skimming oil off acid or caustic baths or for use in other acidic environments. Meets NFPA 99 standards for static decay. Attached string allows socks to be tied down, tied together, or dipped into tanks. These socks float at the surface for easy retrieval. They absorb and retain oil-based liquid, including lubricants and fuels, without taking in water.