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Closed Cell Subsea Foam


As the demand for subsea-related equipment continues to grow, so does the need for construction materials that suit various subsea requirements. Composite materials, like polyurethane foam, have proven to be cost-effective and advantageous for use in shallow and mid-water applications.

General Plastics supplies hydrostatic, pressure-resistant subsea foam for use in subsea mooring buoyancy, semi-submersible craft, pipeline flotation, underwater robotics, ROV/AUVs, and more. Uncoated, this closed-cell polyurethane foam has been tested to depths of 1,200 ft.

The product is resistant to saltwater and has been used in underwater pumps for offshore drilling rigs. Our LAST-A-FOAM® R-3300 semi-submersible series has been used in support of training operations for the International Space Station.

Read this case application to learn more how General Plastics’ Polyurethane Foams show value in subsea and marine applications.

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  • Underwater Buoyancy
  • Underwater robotics (ROV/AUV)
  • Semi-submersible craft
  • Pipeline flotation
  • Subsea mooring buoyancy
  • Buoyancy for assembly components in weightlessness simulation pools
  • Underwater pumps for offshore drilling rigs
  • Core material for resin-transfer molding


  • Provides buoyancy with depths to 1,200 feet uncoated and 2,400 feet coated
  • Excellent mechanical and insulation properties
  • Easy to machine, coat, and paint
  • Dimensionally stable
  • Resistant to hydrostatic pressure
  • High impact resistance
  • Biologically inert
  • Oil, grease, and solvent resistant
  • Cost-effective solution
  • Does not rot or decay
  • Performs in freshwater and saltwater
  • Compatible with many types of adhesives

subsea foam application

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Case Applications

Next Generation Underwater Systems Provides Advancement in Design, Functionality, and Capability with Subsea Bouyancy Foam

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