Integral Skin PU Foam vs Rebond Foam
Polymer · grade comparison
Integral Skin PU Foam and Rebond Foam are both polymer grades. Integral Skin PU Foam is the stronger of the two: tensile strength 4 MPa (0.508 ksi) against 0.15 MPa (0.0218 ksi) for Rebond Foam, about 23 times as much. Integral Skin PU Foam is the more ductile: elongation 150% versus 60% for Rebond Foam. Rebond Foam is lighter (0.08 g/cm³ vs 0.35 g/cm³ for Integral Skin PU Foam) and Integral Skin PU Foam is stiffer (0.05 GPa vs 8×10⁻⁴ GPa). On the shop floor, Rebond Foam machines more easily (very good vs fair), Rebond Foam welds better (poor vs not recommended), and Rebond Foam sits in a lower cost tier (standard, $$) than Integral Skin PU Foam (premium, $$$).
Integral Skin PU FoamChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
Rebond FoamChoose it when weight is the constraint, or when the part is machined in volume.
Integral Skin PU Foam vs Rebond Foam: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all polymer grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all polymer grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Integral Skin PU FoamRebond Foam
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Elongation at Break
Compressive Strength
Compressive Modulus
Flexural Strength
Flexural Modulus
Hardness, Shore A
Tear Strength
Yield Strength (0.2% offset)
Shear Strength
Same in both: Compression Set (22 h, 70 °C) 10%
Physical
Density and transition temperatures.
Density
Glass Transition (Tg)
Water Absorption (24 h)
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Limiting Oxygen Index
Same in both: Max Service Temperature (continuous) 90°C194 °F · Min Service Temperature -30°C-22 °F · Max Service Temperature (short-term) 120°C248 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Dielectric Constant (1 MHz)
Volume Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
UV / Weathering Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Polishability
Mold Shrinkage
Mold Temperature (typ.)
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Thermal Diffusivity
Strength versus weight
Yield strength against density for every polymer grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | Integral Skin PU Foam | Rebond Foam |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$ Premium | $$ Standard |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Integral Skin PU Foam vs Rebond Foam — frequently asked
Is Integral Skin PU Foam stronger than Rebond Foam?
Yes. Integral Skin PU Foam has a typical tensile strength of 4 MPa (0.508 ksi) against 0.15 MPa (0.0218 ksi) for Rebond Foam — about 23 times as much.
Which is cheaper, Integral Skin PU Foam or Rebond Foam?
Rebond Foam is the lower-cost material: it sits in the standard tier ($$) while Integral Skin PU Foam is premium ($$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, Integral Skin PU Foam or Rebond Foam?
Rebond Foam. Its machinability rates very good (80/100) against fair (50/100) for Integral Skin PU Foam; for welding the order is Rebond Foam first (poor, 15/100) then Integral Skin PU Foam (not recommended, 5/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Integral Skin PU Foam and Rebond Foam side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.