HyPUR-cel® I0503
HyPUR-cel® I0503 is an open cell polyurethane foam with a typical density of 5 pcf and a 25% Compression Deflection of 3 psi per ASTM D1056. The material operates across a service temperature range of -40°F to 250°F and achieves a flammability pass rating per FMVSS-302 at 0.063″ or thicker. I0503 exhibits excellent high-temperature compression set, superb compression fatigue properties, and dimensional stability across its rated service range.
Key Properties
- Compression Deflection 25%: 3 psi (Tolerance: 1–5 psi) | ASTM D1056
- Tensile Strength: 50 psi | ASTM D3574
- Elongation: 105% | ASTM D3574
- Compression Set 50%: 9% typical, 15% max | ASTM D3574
- Density: 5 pcf typical (Tolerance: 3.5–6.5 pcf) | ASTM D3574
- Service Temperature: -40°F to 250°F
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Density | 5 pcf (Tolerance: 3.5–6.5 pcf) | ASTM D3574 |
| Compression Deflection 25% | 3 psi (Tolerance: 1–5 psi) | ASTM D1056 |
| Compression Set 50% | 1.5% (3% max) | ASTM D1056 |
| Compression Set 50% | 9% (15% max) | ASTM D3574 |
| 25% CFD | 0.6 psi | ASTM D3574 |
| Tensile Strength | 50 psi | ASTM D3574 |
| Elongation | 105% | ASTM D3574 |
| Tear Strength | 6.9 lb./in | ASTM D624 |
| Resilience | 25% | ASTM D2632 |
| Service Temperature | -40°F to 250°F | — |
Flame & Fire Performance
| Property | Value | Test Method |
| Flammability | Pass @ 0.063″ or Thicker | FMVSS-302 |
Compliance
- FMVSS-302 — Compliant (Pass @ 0.063″ or Thicker)
- Automotive seating and interior cushioning
- HVAC and air filtration gasketing
- Electronic enclosure sealing and vibration dampening
- Medical device padding and protective packaging
- Construction and building envelope weathersealing
Common industries: Automotive, HVAC, Electronics, Medical, Construction.
HyPUR-cel® I0503 is a low-density open cell polyurethane foam designed for sealing, cushioning, and gasketing applications where breathability and long-term resilience are required. Within the HyPUR-cel® I-series, I0503 represents the softest compression profile at the 5 pcf density level, making it the preferred choice when low sealing force combined with dimensional stability is a primary design criterion.
The foam exhibits excellent high-temperature compression set and superb compression fatigue properties, allowing it to maintain sealing effectiveness across repeated deflection cycles and elevated operating temperatures. Its open cell structure permits air and moisture passage, and the material accepts adhesive laminations, fabric bonding, films, and custom coatings for fabricated component applications.
Compliant with FMVSS-302.
What differentiates I0503 from other grades in the HyPUR-cel® I-series at the same density?
I0503 is the softest compression grade at the 5 pcf density level, with a 25% Compression Deflection of 3 psi. It is designed for applications where low sealing force is required, distinguishing it from the I0507 which delivers a firmer 7 psi compression profile within the same density class.
Why is compression set critical when selecting a foam for sealing applications?
Compression set measures the permanent deformation a foam retains after being held at a fixed deflection. A low compression set — 1.5% per D1056 and 9% per D3574 for I0503 — means the material recovers close to its original thickness after deflection, maintaining continuous sealing contact over time and across thermal cycles.
What is the service temperature range for I0503?
I0503 is rated for continuous service from -40°F to 250°F as listed on the TDS.
Is I0503 suitable for automotive flammability-regulated environments?
Yes. I0503 achieves a pass rating per FMVSS-302 at 0.063" or thicker, making it suitable for use in automotive interior applications subject to Federal Motor Vehicle Safety Standards flammability requirements.
How should I0503 be specified?
Specify grade (I0503), thickness, compliance requirements (FMVSS-302 if required), dimensional tolerances, and finished format.
