Extremely buoyant and durable, the billet material is composed of millions of tiny non-interconnecting air cells – each serving as an independent buoyancy chamber. These billets won’t lose their buoyancy, even if punctured. It takes only 1 cubic foot (0.03 cubic meter) of Styrofoam™ Brand Buoyancy Billets to float 55 pounds (25 kilograms).

Lightweight, the billets are easy to install. And they stay on the job year after year under normal conditions. They resist the attack of destructive marine growths, are unaffected by salt or fresh water, won’t become waterlogged and won’t corrode.