90400 & 90405 Bilge oil boom Absorbs oil in the bilge so that remaining water may legally be pumped overboard. Convenient tie down keeps the boom in place. Special design allows maximum absorption. Ideal for bilges, sumps, drains and basins. Bilge Oil Boom absorbs oil, fuel & hydraulic fluid but will not absorb water. Helps protect the environment. For spill containment on water and land, or around drains and equipment. 90400 Small Bilge Oil Boom, 15" x 5' Absorbs up to 1.2 gallons. 90405 Large bilge oil boom 16ö x 6ö Diameter Absorbs up to 2.8 gallons.