Produced by Xiangchu Rubber, this LSR LED module seal buffer has excellent waterproof sealing performance, good weather and temperature resistance. It can buffer external impact to protect LED modules, meets ISO 9001 quality standards, and supports size and hardness customization.
Material
Industrial LSR
Hardness
Shore A 30-60
Temperature
Certifications
Applications
-40°C ~ +150°C
Colors
Black, White, Transparent, Customizable
# Liquid Silicone LED Module Seal Buffer
Liquid Silicone LED Module Seal Buffers are custom-molded LSR components designed specifically to solve two core functional needs for outdoor and high-intensity LED lighting systems: reliable environmental sealing and controlled mechanical shock absorption. Manufactured by 橡楚（湖北）橡胶有限公司 (Xiangchu (Hubei) Rubber Co., Ltd.) from 100% pure low-volatile liquid silicone rubber, these components deliver long-term performance in harsh operating conditions that would degrade conventional organic rubber or foam seals.
Our Liquid Silicone LED Module Seal Buffers combine the inherent properties of injection-molded LSR to create a multi-functional part that replaces separate sealing gaskets and foam buffers, simplifying LED module assembly and reducing overall system component count. Unlike cut gaskets or extruded profiles, our precision-molded LSR seal buffers maintain tight dimensional tolerances across mass production runs, ensuring consistent fit and performance for every unit. This product is ideal for LED systems deployed in outdoor infrastructure, industrial facilities, and marine environments where exposure to temperature extremes, UV radiation, and moisture is constant.
Our Liquid Silicone LED Module Seal Buffers are produced from addition-cured polydimethylsiloxane (PDMS) liquid silicone rubber, with the following base material properties:
All performance values are tested at 23°C / 50% RH per ASTM D2000 standards:
Our precision liquid injection molding process is controlled to meet the following requirements:
Unlike traditional LED assembly that requires separate rubber gaskets for sealing and foam pads for buffering, our LSR seal buffers integrate both functions into a single component. This cuts assembly time by up to 30%, reduces inventory SKU counts, and eliminates the risk of missing separate buffer components during production. The uniform mechanical properties of LSR also deliver more consistent shock absorption than open-cell foam, which degrades and compresses over time.
Liquid silicone rubber inherently resists UV radiation, ozone, and atmospheric moisture, unlike organic rubbers (nitrile, EPDM) that crack, harden, and degrade after 2-3 years of outdoor exposure. Our low-bleed formulation eliminates silicone migration that can fog LED lenses or diffusers, preserving the optical output and uniformity of the LED module over its entire service life. Even after 5 years of continuous outdoor exposure, our seal buffers retain over 80% of their original elongation and hardness, maintaining sealing performance.
We use high-precision liquid injection molding (LIM) equipment to produce seal buffers, which maintains tight dimensional tolerances that cannot be achieved with manual cutting or compression molding of solid silicone. This ensures a tight, uniform compression of the seal across the entire LED module housing, eliminating gaps that can lead to water intrusion. Consistent hardness and compression set across all production runs mean every seal buffer performs identically, with no unexpected performance variation between batches.
We offer full customization of shape, size, and hardness to match any LED module design, from small 10mm smart street lighting modules to large 200mm industrial flood light modules. We can add integrated mounting tabs, through-holes for fasteners, or contour profiles to match uneven housing surfaces, all in a single molding step. Color customization is also available to match module housing aesthetics or for internal product line identification.
Liquid Silicone LED Module Seal Buffers are designed for a wide range of LED lighting applications, with primary use cases including:
The right hardness depends on your application's sealing pressure and buffering requirements:
We produce custom-sized seal buffers matched exactly to your LED module dimensions, with no minimum order quantity for tooling development for qualified projects. We can produce volumes from low-volume prototyping (10–100 units) to mass production (100,000+ units per year) to match your project requirements. All dimensions are held to the tolerance standards outlined in our technical specifications, and we provide 3D CAD model matching for all custom designs.
We offer two standard material grades to match different application requirements:
At 橡楚（湖北）橡胶有限公司 (Xiangchu (Hubei) Rubber Co., Ltd.), we operate a quality management system certified to ISO 9001, with in-process quality checks at every stage of production from raw material incoming inspection to final part shipment. All raw materials are sourced from certified global silicone suppliers, and we test every batch of raw material for hardness, volatile content, and cure performance before production.
Our final inspection process includes 100% visual inspection for molding defects, dimensional sampling per MIL-STD-105E standards, and performance testing for compression set and weatherability per our internal specifications. We provide full material test reports and production inspection certificates with every order, and we stand behind our products with a 12-month performance warranty against manufacturing defects.
Our production facility is located at 湖北省鄂州市鄂城区经济开发区凡口街道内河巷54号, Ezhou City, Hubei Province, China. For inquiries about custom Liquid Silicone LED Module Seal Buffers, please contact us at: Phone: +86 18071171144, Email: churubber@163.com. We provide fast quotation turnaround for custom designs and can deliver prototype parts in 7–10 business days.
