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Last-A-Foam FR-4300 Series

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Structural Polyurethane Foam

LAST-A-FOAM® FR-4300 Thermoformable Board Series

General Plastics’ LAST-A-FOAM® FR-4300 Thermoformable Board Series is a unique flame-retardant structural polyurethane foam. It is ideal for composite panel cores and other structures where compound-curved surfaces or other details can be made with low-cost heat-forming methods. While it is heat-formable, it retains all the chemical and solvent-resistant properties of polyurethane foams. A closed-cell material, it is easily bonded and will accept a variety of adhesives and coatings. This series is non-abrasive and can be machined with standard high-speed steel (HSS) cutting tools. It can also be cut cleanly with water jets and traditional wood-carving tools.

AdvantagesApplications
  • Retains polyurethane foam’s chemical and solvent properties under heat
  • Accommodates low-cost heat-forming methods
  • Bonds easily
  • Accepts variety of adhesives and coatings
  • Composite panel cores
  • Detailed structures and compound-curved surfaces
 

Sizing Chart

ProductsDensity (lbs/ft3)HeightWidthLength
R-4305  5 24 48 120
R-4305  5 24 48 96
R-4315 15 24 48 96
R-4310 10 24 48 96

Shown are maximum standard stock sizes based on density. Custom sizes are available. Cut sizes are available from .125 inches (3.175 mm) up to standard stock heights as listed above.

ProductsDensity (kg/m3)HeightWidthLength
R-4305 80 60 120 300
R-4305 80 60 120 240
R-4315 240 60 120 240
R-4310 160 60 120 240

Shown are maximum standard stock sizes based on density. Custom sizes are available. Cut sizes are available from .125 inches (3.175 mm) up to standard stock heights as listed above.

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