Polyurethane Foam
PORON® 4701-60 (Very Firm)
Overview
PORON® 4701-60 is a very firm, microcellular polyurethane foam engineered for demanding energy management, gasketing, and gap-filling applications. Its high resistance to compression set ensures long-term sealing integrity under heavy loads and in extreme environments such as vibration, dust, heat, and shock.
Features
- Extra-firm density — excellent compression set resistance for high-load scenarios.
- Thickness range: 0.031″ to 0.250″ (0.79 mm to 6.35 mm).
- Density options: 15 lb/ft³ (240 kg/m³), 20 lb/ft³ (320 kg/m³), 25 lb/ft³ (400 kg/m³).
- Compression Force Deflection (25%):
- 36 psi (249 kPa), 62 psi (428 kPa), or 93 psi (643 kPa) depending on density.
- Compression Set (70 °C max): up to 10%.
- Tensile Strength: 931–1724 kPa; Elongation: ~45–50%; Tear Strength: ~3.3–5.3 kN/m.
- Temperature Performance:
- Continuous: up to 90 °C
- Intermittent: up to 121 °C
- Embrittles below –16 °C
- Additional features:
- Excellent compression recovery
- Good UV and ozone resistance
- Low outgassing; flame-rated as UL 94 HBF
- Stable mechanical/forming properties, fabricates easily via die-cut, waterjet, or laser
Benefits
- Offers superior energy management under high compression loads.
- Maintains long-lasting seal integrity in harsh operational environments.
- Reduces material creep and dimension loss over time.
- Highly durable — provides firm support and shape retention across cycles.
- Fabrication ready — supports custom gasket and seal production.
Applications
- Heavy-duty gasketing in industrial and automotive sectors
- Shock-absorbing and vibration-damping pads and supports
- High-performance sealing solutions in rugged environments
- Cable and enclosure sealing where high closure force is essential
Why Choose PORON® 4701-60?
- Exceptionally firm and resilient — ideal for challenging energy-management needs.
- Preserves mechanical properties across wide temperature extremes.
- Delivers reliable long-term performance under repetitive loading.
- Offers flexibility in design with densities and thickness variations.
- Designed for demanding environments — trusted for durable gasketing solutions.
Data Sheets
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