Buoyancy Billets are an excellent choice for floating structures such as docks, rafts and boathouses. The blocks or "billets" of rigid extruded polystyrene foam are lightweight, quick to install and won't lose their buoyancy, even if punctured. They are unaffected by salt or fresh water, won't waterlog, rust or corrode, and are resistant to damage from destructive marine growth.
These blocks are composed of millions of tiny air cells, each one acting as an independent buoyancy chamber. Each billet measures 12" x 12" x 18", and has an average buoyancy that is approximately 150 percent greater than an equivalent sized floating drum. In fact, just one cubic foot of the foam billets can float up to 55 pounds
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