Xiangchu custom produces liquid silicone rubber sealing gasket washers, molded with high-quality LSR raw material. It features good sealing performance, high and low temperature resistance and anti-aging, suitable for waterproof and dustproof sealing requirements of various working conditions, size and hardness can be customized as required.
Material
Industrial LSR
Hardness
Shore A 30-70
Temperature
Certifications
Applications
-40°C ~ +200°C
Colors
Black, White, Transparent, Customizable
# Liquid Silicone Rubber Sealing Gasket Washer
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Liquid Silicone Rubber (LSR) sealing gasket washers are critical precision sealing components designed to prevent fluid leakage, block dust and contaminants, absorb mechanical vibration, and maintain pressure stability in static and low dynamic assembly applications. 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 sealing gasket washers are formed through high-precision injection compression molding of food-contact and industrial-grade liquid silicone rubber, delivering consistent performance across a wide range of harsh operating environments.
Unlike cut gaskets made from solid rubber sheets or alternative polymer materials such as nitrile rubber (NBR) or ethylene propylene diene monomer (EPDM), our LSR sealing gasket washers leverage the inherent properties of cured liquid silicone to deliver superior long-term sealing performance. Our production process eliminates material waste common to die-cutting operations, enables tight dimensional tolerances for complex geometries, and ensures uniform material density across every part, even for thin-walled or intricate designs. We produce custom and standard gasket washers to match specific application requirements, from small electronic device seals to large industrial equipment gaskets.
Core selling points of our LSR sealing gasket washers include excellent low- and high-temperature resistance, broad chemical compatibility, long-term compression set resistance, and customizable mechanical properties to match specific application needs. All products are produced under controlled manufacturing processes aligned with our quality management system standards, with batch testing to ensure consistent performance for every order.
Our LSR sealing gasket washers are manufactured from 100% cured platinum-catalyzed liquid silicone rubber, with no added fillers that compromise long-term performance. Key inherent material properties are listed below:
All performance values below are tested per ASTM D2000 standard testing methods for cured silicone rubber:
Our standard manufacturing process tolerances and capabilities for LSR sealing gasket washers are as follows:
*Custom tolerances tighter than the standard range are available upon request, depending on part size and geometry.*
LSR demonstrates far lower long-term compression set than most organic rubber materials, meaning our sealing gasket washers maintain their original thickness and sealing force even after years of continuous compression under operating conditions. This reduces the need for frequent re-tightening or replacement of seals, extending maintenance intervals and lowering total lifecycle cost for end products.
Unlike NBR gaskets that stiffen and crack at sub-zero temperatures or degrade at temperatures above 100°C, our LSR sealing gasket washers retain their flexibility and sealing performance across a 290°C operating range. They also resist ozone degradation, UV exposure, and aging in outdoor environments, making them suitable for both indoor and outdoor long-term use with no significant performance degradation.
Our injection molding process for LSR enables production of gasket washers with complex profiles, stepped edges, integrated locating tabs, or custom cutouts that cannot be achieved economically with die-cut solid rubber. We can produce both large batches of standardized gasket washers and low-volume custom prototype parts to match customer design requirements.
Our food-grade and medical-grade LSR formulations comply with standard non-toxicity requirements, making them suitable for contact with food, drinking water, and medical devices. The cured silicone material does not leach additives or contaminants into surrounding media, and resists microbial growth for use in hygienic applications.
Our LSR sealing gasket washers are used across a wide range of industrial and consumer applications, including:
The correct Shore A hardness for your LSR sealing gasket washer depends on your application's compression range and sealing requirements:
We offer both standard off-the-shelf sizes matching common industry flange and fastener dimensions, and fully custom sizes designed to match your unique product requirements. When requesting a custom quote, please provide full 2D CAD drawings or 3D model files with defined tolerances to ensure accurate production matching your design. For standard replacement gasket washers, please specify inner diameter, outer diameter, and thickness to confirm compatibility with our existing tooling.
We offer three primary material grades for our LSR sealing gasket washers to match different application requirements:
橡楚（湖北）橡胶有限公司 operates an ISO 9001 certified quality management system, with strict quality control protocols implemented at every stage of production from raw material incoming inspection to final product testing before shipment. All raw materials are sourced from qualified silicone suppliers with full material test reports, and every production batch undergoes dimensional inspection, visual quality checks, and performance testing for key parameters such as hardness and compression set to ensure compliance with product specifications.
We are committed to delivering consistent, high-quality LSR sealing gasket washers that meet customer requirements. For custom orders, we provide pre-production sample approval before full-scale manufacturing to confirm part dimensions, material properties, and visual quality match customer expectations.
For inquiries about standard products, custom design support, or bulk ordering, please contact us at:
