This liquid silicone rubber O-ring seal gasket is produced by Xiangchu Rubber. It offers excellent sealing performance, good resistance to high and low temperature and aging. It meets ISO 9001 quality standards, supports customized size and hardness, fits various waterproof sealing requirements.
Material
Industrial LSR
Hardness
Shore A 30-70
Temperature
Certifications
Applications
-40°C ~ +200°C
Colors
Black, White, Transparent, Customizable
# Liquid Silicone Rubber O-ring Seal Gasket
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Liquid Silicone Rubber (LSR) O-ring seal gaskets are precision-molded static sealing components designed to prevent fluid or gas leakage between mating mechanical parts. Manufactured by 橡楚（湖北）橡胶有限公司 at our facility in 湖北省鄂州市鄂城区经济开发区凡口街道内河巷54号, our LSR O-ring gaskets combine the inherent excellent properties of liquid silicone rubber with tight dimensional tolerances to deliver reliable long-term sealing performance across a wide range of operating conditions.
Unlike general rubber O-rings, our LSR O-ring seal gaskets are produced through injection molding of high-purity liquid silicone rubber, resulting in a consistent, low-porosity structure that delivers superior compression set resistance and thermal stability compared to conventional solid rubber seals. Our products are suitable for both standard and custom sealing requirements, supporting mass production and small-batch custom orders to match specific application needs.
Core selling points of our LSR O-ring seal gaskets include: wide service temperature range, excellent aging resistance, food-safe and medical-compatible material options, low compression set for long-term sealing, and customizable dimensions and hardness to fit unique application requirements.
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Our LSR O-ring seal gaskets are manufactured from 100% pure addition-cured liquid silicone rubber, with no recycled filler materials. Key material properties are listed below:
All our LSR O-ring seal gaskets meet the following standard physical performance parameters (values vary by hardness grade):
Our standard manufacturing process parameters for LSR O-ring seal gaskets are:
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Unlike nitrile rubber (NBR) or ethylene propylene diene monomer (EPDM) seals that degrade rapidly at high temperatures, our LSR O-ring gaskets retain their elasticity and sealing performance after long-term exposure to extreme temperatures and UV radiation. They do not crack, harden, or leach harmful substances in high-temperature environments, making them ideal for long-term use in demanding thermal conditions.
Our platinum-catalyzed addition curing process produces a fully cross-linked silicone structure with extremely low compression set. This means the O-ring gasket retains its original shape and elastic resilience after long-term compression between mating parts, avoiding common seal failure issues such as leakage caused by permanent deformation. The service life of our LSR O-ring gaskets is 2–3 times longer than conventional general rubber gaskets under the same working conditions.
We offer raw material grades from general industrial to food-contact and medical-grade, all produced without harmful plasticizers or heavy metal additives. Our food-grade and medical-grade LSR O-ring gaskets meet international food safety and biocompatibility standards, making them suitable for use in food processing equipment, medical devices, and drinking water systems.
We support custom production of non-standard dimensions, special hardness, and functional modified LSR O-ring gaskets (e.g., conductive, heat-conductive, flame-retardant). Our engineering team can adjust product parameters to match your specific sealing needs, whether you need a small batch of prototype seals or mass production for large-scale manufacturing.
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Our LSR O-ring seal gaskets are widely used across multiple industries for static and low dynamic sealing applications:
Note: LSR O-ring seal gaskets are not recommended for continuous use in high-concentration petroleum-based oils, fuels, or strong organic solvents, as these will cause swelling and performance degradation. For these applications, please contact our team to discuss alternative material options.
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The hardness of the LSR O-ring gasket should be selected based on your working pressure and installation space:
We produce standard metric and inch LSR O-rings matching global standard sizes, as well as custom non-standard sizes per customer drawings. The standard cross-section diameter range we produce is 0.5mm to 20mm, and the inner diameter range is 1mm to 500mm. For sizes outside this range, please contact our sales team to discuss feasibility. When selecting a size, please confirm the inner diameter, cross-section diameter, and required tolerance level to ensure proper fit with your mating parts.
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橡楚（湖北）橡胶有限公司 operates a strict quality management system certified to ISO 9001, and every batch of LSR O-ring seal gaskets undergoes full quality inspection before delivery, including dimensional checks, visual appearance inspection, hardness testing, and compression set sampling testing. We maintain complete production and inspection records for each batch to ensure consistent product quality that meets agreed specifications.
If you have any questions about product selection, customization, or technical support, please contact us:
We welcome inquiries for standard products and custom development projects to match your specific sealing requirements.
