HyPUR-cel® V0533
HyPUR-cel® V0533 is a viscoelastic open cell polyurethane foam with a typical density of 5 pcf and an Indentation Force Deflection (IFD) of 33 lbs at 25% per ASTM D3574. The material delivers very low resilience of 3.5% with 270% elongation and exceptionally low compression set of 0.6% per D1056, operating across a service temperature range of -40°F to 250°F. V0533 is thermoformable and well suited for medium-firmness body-contact cushioning, pressure management, and impact absorption applications requiring slow force recovery and long-term shape retention.
Key Properties
- IFD 25%: 33 lbs (28 – 38 lbs tolerance) per ASTM D3574
- Tensile Strength: 35 psi per ASTM D3574
- Elongation: 270% per ASTM D3574
- Compression Set 50%: 0.6% (3% max) per ASTM D1056
- Density: 5 pcf (4 – 7 pcf tolerance) per ASTM D3574
- Service Temperature: -40°F to 250°F
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- Specifications
- Applications
- General Info
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Physical Properties
| Property | Value | Test Method |
| Density | 5 pcf (4 – 7 pcf tolerance) | ASTM D3574 |
| Service Temperature | -40°F to 250°F | — |
Mechanical Properties
| Property | Value | Test Method |
| IFD 25% | 33 lbs (28 – 38 lbs tolerance) | ASTM D3574 |
| 25% CFD | 0.59 psi | ASTM D3574 |
| Tensile Strength | 35 psi | ASTM D3574 |
| Elongation | 270% | ASTM D3574 |
| Tear Strength | 5.6 lb./in | ASTM D624 |
| Compression Set 50% | 0.6% (3% max) | ASTM D1056 |
| Compression Set 50% | 2.6% (5% max) | ASTM D3574 |
| Resilience | 3.5% | ASTM D2632 |
- Body-contact cushioning and pressure management components
- Automotive seating comfort layers and headrests
- Medical device padding and patient positioning aids
- Impact protection and energy absorbing assemblies
- Thermoformed contoured cushion and ergonomic padding
Common industries: automotive, medical, ergonomic seating, protective equipment.
HyPUR-cel® V0533 is a medium-firmness viscoelastic open cell polyurethane foam positioned in the middle of the HyPUR-cel viscoelastic family. With a 33 lb IFD and very low resilience of 3.5%, V0533 delivers slow force recovery and conformable fit while providing meaningfully more support than the softer V0525 and V0517 grades. The material is engineered for body-contact cushioning, pressure management, and impact absorption applications where long-term shape retention is essential.
The open cell structure allows air and moisture passage, and the foam exhibits 270% elongation for conformable fit over complex geometries together with exceptionally low compression set of 0.6% per ASTM D1056. V0533 is thermoformable for custom contoured part production and remains dimensionally stable across a wide service temperature range of -40°F to 250°F. The material is available with adhesives, laminated films, fabrics, and custom coatings.
What differentiates V0533 from softer and firmer grades in the HyPUR-cel viscoelastic family?
V0533 occupies the medium-firmness position with a 33 lb IFD — firmer than V0525 (25 lbs) but softer than V0542 (42 lbs). It combines that mid-range support with very low resilience of 3.5% and exceptionally low compression set of 0.6%, producing a balanced, slow-recovery cushion that retains shape over extended service.
Why is compression set critical for viscoelastic cushioning foams?
Compression set measures the permanent thickness loss a foam retains after sustained compression — it is the primary indicator of long-term cushion durability. V0533's 0.6% compression set per ASTM D1056 is exceptionally low for a viscoelastic foam, meaning the material recovers nearly fully from extended loading and maintains consistent comfort and pressure distribution through repeated use.
What is the service temperature range for V0533?
-40°F to 250°F.
Is V0533 suitable for regulated environments?
No compliance standards are specified on the manufacturer's TDS for V0533. End users requiring flammability, medical, automotive, or other regulatory qualification should request supporting documentation from H-O Products for the specific application.
How should V0533 be specified?
Specify grade (V0533), thickness, compliance requirements, dimensional tolerances, and finished format.
