

High Temperature Tooling Foam
LAST-A-FOAM® FR-4700 TOOLING FOAM BOARD
Our advanced LAST-A-FOAM® FR-4700 high-temperature polyurethane tooling foam can withstand peak temperatures up to 400° F (200°C) and continuous-use temperatures up to 350° F (177°C) – significantly more than other products on the market. 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. Affordable and dimensionally stable, this rigid foam board is ideal for prototype machining, high-temperature curing prepregs, vacuum forming, pattern making, and other limited-run tooling where traditional metal dies are cost-prohibitive. The FR-4700 high-temp series of high-density polyurethane tooling board foam is available in thicknesses up to 12 inches in 18-lb. densities, and up to 11 inches in 30- and 40-lb. densities. This high-performance material is an excellent choice for all of your high-temperature needs.
Machinability
Our FR-4700 tooling board is non-abrasive and can easily be machined to meet product applications. 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 GuideAdvantages
- Supports continuous-use temperatures up to 350°F
- Max use temperature of 400°F (204°C)
- Highly machinable
- Consistently uniform
- Dimensionally stable
Applications
- Prototype machining
- Prepreg composite layup tools
- High-temperature curing prepregs
- Master plugs and molds
- Vacuum forming
- Tool proofing
- Limited-run tooling
- Pattern making
- Master model making
- Monolithic tools and molds
PRODUCT SIZING CHARTS
Products | Density (lbs/ft3) | Height (in) | Width (in) | Length (in) | Request a Quote |
---|---|---|---|---|---|
FR-4718 | 18 | 12 | 48 | 96 | Quote » |
FR-4730 | 30 | 11 | 24 | 96 | Quote » |
FR-4740 | 40 | 11 | 24 | 96 | Quote » |
Products | Density (kg/m3) | Height (cm) | Width (cm) | Length (cm) | Request a Quote |
---|---|---|---|---|---|
FR-4718 | 288 | 30 | 122 | 244 | Quote » |
FR-4730 | 481 | 28 | 61 | 244 | Quote » |
FR-4740 | 641 | 28 | 61 | 244 | Quote » |
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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Related Resources

Technical Papers
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