A floatable, fire-resistant spill containment boom that is easily deployable on the surface of a body of water is comprised of a series of fire-resistant planar main panels having flotation devices attached thereto to maintain the main panels in a substantially upright position when deployed. A portion of each panel is submerged and a portion is above the water to form a continuous barrier to contaminants spilled on the water surface. A first group of the main panels have flotation devices mounted directly on the faces of the panels, while a second group of panels has the flotation devices mounted thereon in outrigger fashion on arms pivotally attached to the main panel to carry the flotation devices between a deployed position spaced from the panel and a stowed position closely adjacent the panel. The main panels are connected by a semirigid coupling panel interposed between each pair of adjacent main panels and rigidly attached to said adjacent main panels. Preferably, the flotation devices are comprised of masses of closed-cell glass foam enclosed in a container of fireproof material, such as metal.
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