Multi-Use Polyurethane Foam Board | General Plastics
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Multi-Use Foam Series

LAST-A-FOAM® FR-7100 Series

This uniform polyurethane foam board is easily finished or painted for low-cost core applications, hand-carved models, prototypes, CNC-machined topographical maps, industrial patterns, and composite layup tools below 200ºF. 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. Modeling foam is available in densities of 4 to 40 lbs. per cubic ft. as sheet stock as well as large-size blocks. The FR-7100 Series is ideal for applications that call for an economical, versatile and stable stock material.

FR-7100 boards can be used in low and high densities. The ability to combine high and low densities in one layup makes it an ideal material for composite layups. The material contains no mold-release agents to inhibit bonding.


These products are formulated to meet the demands of composite boat builders at competitive prices for marine usage: freezer insulation, fish boxes, interiors, seat mounting pads, steering wheel mountings, and decks.

Modeling and Prototype Foam

The FR-7100 material is suitable for hand-carved models, CNC-machined topographical maps, prototypes, and industrial patterns.

Tooling and Molds

LAST-A-FOAM® FR-7100 products have been used successfully in modeling foam tooling applications for many years. This material meets the needs of mold and toolmakers because it is stress-free, easy to machine, and uniform in density throughout the block. For applications requiring higher strength, greater detail, or increased heat and pressure resistance at process temperature, a density of 20 lb. per cubic foot is usually the best choice. Typical uses include composite layup tools, drape-forming tools, and vacuum-form tools.


Our FR-7100 tooling board is a very uniform board that is easily finished or painted for low-cost core applications as well as use for composite layup tools and for industrial patterns. It is recommended that you do a rough cut first, leaving 1-3 mm of material for finishing.  Use caution at edges and tight corners to avoid chipping at the start of a new pathway and when exiting the foam.  See our Tooling & Molds User Guide for more information like roughing speed, finishing speed, and other machining information.

Download Tooling Guide


  • Fine cell structure supports very smooth finishes
  • Closed-cell foam does not absorb water or moisture
  • Easily painted and bonded
  • Economical and versatile
  • Dimensionally stable – will not warp, twist or bow
  • Grain-free surface
  • Easily shaped with a variety of cutting processes
  • Max use temperature of 220°F (104°C)
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  • Proofing NC/CNC machine programs
  • Prototype models
  • Composite core
  • Marine: Interior, mounting pads, heads, galleys, and more
  • Solar: Panel backing and support, parabolic mirror farms
  • Custom parts
  • Layup tools
  • Drape-forming tools
  • Vacuum-form tools
  • Dielectric: radome and antenna


ProductsDensity (lbs/ft3)Height (in)Width (in)Length (in)Request a Quote
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FR-71066244896Quote »
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FR-7130301248100Quote »
FR-713535122496Quote »
FR-7140401226100Quote »
ProductsDensity (kg/m3)Height (cm)Width (cm)Length (cm)Request a Quote
FR-71046461122244Quote »
FR-71069661122244Quote »
FR-710711261122244Quote »
FR-710812861122244Quote »
FR-711016061122244Quote »
FR-71101606446254Quote »
FR-711219264122244Quote »
FR-711524064122244Quote »
FR-711828846122244Quote »
FR-712032046122244Quote »
FR-713048130122254Quote »
FR-71355613061244Quote »
FR-71406413066254Quote »

Shown are maximum standard stock based on density. Custom sizes are available. Cut sizes are available from 0.125 inches (3.175mm) up to standard stock heights as listed above

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