HyPUR-cel® S0501
HyPUR-cel® S0501 is an open cell polyurethane foam with a typical density of 5 pcf (4–6.5 pcf tolerance) and a 25% Compression Deflection of 1 psi per ASTM D1056. The material operates across an extended service temperature range of -67°F to 250°F and exhibits exceptionally high elongation of 325% combined with low compression set. S0501 is thermoformable and well suited for applications requiring a very soft, highly conformable foam with excellent shape recovery, low sealing force, and dimensional stability across a wide temperature range.
Key Properties
- Compression Deflection 25%: 1 psi (Tolerance: 0.5 – 2.5 psi) | ASTM D1056
- Tensile Strength: 75 psi | ASTM D3574
- Elongation: 325% | ASTM D3574
- Compression Set 50%: 4% (8% max) | ASTM D1056
- Density: 5 pcf typical (Tolerance: 4 – 6.5 pcf) | ASTM D3574
- Service Temperature: -67°F to 250°F
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Tolerance | Test Method |
| Density | 5 pcf | 4 – 6.5 pcf | ASTM D3574 |
| Compression Deflection 25% | 1 psi | 0.5 – 2.5 psi | ASTM D1056 |
| Compression Set 50% | 4% | 8% max | ASTM D1056 |
| 25% CFD | 0.75 psi | N/A | ASTM D3574 |
| Tensile Strength | 75 psi | N/A | ASTM D3574 |
| Elongation | 325% | N/A | ASTM D3574 |
| Tear Strength | 11 lb./in | N/A | ASTM D624 |
| Resilience | 6% | N/A | ASTM D2632 |
| Service Temperature | -67°F to 250°F | — | — |
- Low-force gasketing and conformable sealing
- Thermoformed padding and contoured cushioning components
- Automotive interior soft-touch and acoustic applications
- Medical device padding and body-contact cushioning
- Cryogenic and low-temperature sealing applications
Common industries: Automotive, Medical, Cryogenic, Aerospace, Industrial.
HyPUR-cel® S0501 is the softest grade in the HyPUR-cel® S-series, a family of thermoformable open cell polyurethane foams engineered for conformable sealing, low-temperature performance, and body-contact cushioning applications. At 5 pcf with a 25% Compression Deflection of 1 psi, it delivers the lowest sealing force in the series, making it the preferred choice when minimal compression load is required and maximum conformability over complex geometries is critical.
The foam exhibits 325% elongation per ASTM D3574 — the highest in the S-series — allowing it to stretch over irregular surfaces without tearing or losing shape recovery. Its extended service temperature range of -67°F to 250°F makes it suitable for cryogenic sealing environments where standard grades rated to -40°F would be insufficient. Compression set of 4% per ASTM D1056 supports long-term seal retention after deflection.
The thermoformable construction enables heat-shaping into contoured components without adhesives. The material accepts laminations, fabrics, films, and custom coatings.
What differentiates S0501 from S0601 and other S-series grades within the HyPUR-cel® S-series?
S0501 is the softest and most conformable grade in the S-series with a 25% Compression Deflection of 1 psi and 325% elongation — the highest elongation in the series. S0601 is firmer at 2 psi CD and 130% elongation at 7 pcf. S0501 is selected when minimum sealing force and maximum stretch are the primary design requirements.
Why is thermoformability important for S-series foam applications?
Thermoformability allows the foam to be heat-shaped into contoured or three-dimensional configurations without adhesive lamination or complex tooling. This is particularly valuable in body-contact cushioning, automotive soft-touch components, and conformable sealing assemblies where a flat sheet cannot achieve the required geometry. S0501 is thermoformable as stated on the TDS.
What is the service temperature range for S0501?
S0501 is rated for continuous service from -67°F to 250°F as listed on the TDS. The lower limit of -67°F distinguishes the S-series from standard I-series grades and makes it suitable for cryogenic and low-temperature environments.
Is S0501 suitable for regulated or compliance-rated environments?
No compliance standards are listed on the manufacturer's TDS for S0501. Suitability for regulated environments should be confirmed through independent testing.
How should S0501 be specified?
Specify grade (S0501), thickness, dimensional tolerances, and finished format.
