Silicone rubber sealing gasket is a high-performance elastic sealing material made from organic silicone polymers. With its unique chemical structure and physical properties, it plays an irreplaceable role in scenarios with high temperature, low temperature, insulation, and high hygiene and safety requirements.
1. Core Performance Features
1. Extreme Temperature Adaptability
- High temperature resistance: The long-term operating temperature range can reach -60℃~250℃, and it can withstand 300℃ for a short time (such as automotive engine seals). It can be used almost permanently at 150℃ and can operate continuously for over 10,000 hours at 200℃.
- Low temperature resistance: Remains elastic at -70℃, not easily brittle, suitable for freezing equipment and cold region machinery.
2. Excellent sealing and physical stability
- Waterproof and dustproof: The closed-cell structure provides excellent air tightness, low water absorption rate, suitable for scenarios requiring protection against liquid intrusion, such as battery enclosures and outdoor electronic devices.
- High rebound compression resistance: rebound rate >90%, low permanent deformation rate under compression (≤50% after 48 hours at 200℃), suitable for environments requiring frequent disassembly or vibration (such as shock-absorbing pads for new energy vehicle batteries).
- Aging resistance and weather resistance: UV, ozone, and radiation resistant, with a lifespan of up to 10-15 years in outdoor or harsh weather conditions.
3. Safety and Environmental Protection
- Flame retardant and fireproof: Some products have passed UL94 V-0 certification (such as battery sealing gaskets) and extinguish themselves when away from fire.
- Food grade and medical grade certification**: Complies with **FDA, LFGB, ROHS** standards, non-toxic and tasteless, suitable for sealing medical devices and food processing equipment (such as drinking water machine pipelines, bottle stoppers).
4. Electrochemical Performance
- High insulation properties: dielectric strength 20-25 kV/mm, resistant to electric arcs and corona, good insulation stability in humid environments, suitable for high voltage cable joints and sealing of electronic components.
- Chemical corrosion resistance: Good resistance to weak acids, weak bases, and alcohol, but use with caution in strong solvents, concentrated oils, and concentrated alkaline environments (such as sodium hydroxide).
5. Machining Characteristics
- Density range 0.25-0.85 g/cm³, Shore hardness 8-80 HA, can be die-cut and stamped into complex shapes (such as E-type, O-type, irregular strips).
- Optional adhesive backing design (pressure-sensitive adhesive), supports quick sticking to surfaces such as metal, plastic, glass, etc.

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