Abstract: The instant application discloses, among other things, a foam-based boom to provide for a spill containment on either water or land. In one embodiment, an expanding foam, such as polyurethane, may be used form a cylindrical or other shaped boom, providing strength, flexible boom shape and size, and easy deployment. Multiple types of foams may be used together; for example, a water absorbing foam may be used in conjunction with a waterproof foam, to allow for a boom to extend both underwater and above water.