Custom LSR Waterproof Seal Ring for Smart Lighting Fixtures
LSR Waterproof Seal For Smart Lamps
Liquid Silicone Rubber Injection MoldingPublished on May 30, 2026
This liquid silicone rubber waterproof seal is produced by Xiangchu (Hubei) Rubber Co., Ltd. It is specially designed for smart lighting fixtures, with excellent waterproof and weather resistance, stable sealing performance. We support customized size and hardness, all products follow ISO 9001 quality management.
Material
Industrial LSR
Hardness
Shore A 30-70
Temperature
-40°C ~ +200°C
Colors
Black, White, Transparent, Customizable
Certifications
ISO 9001
Applications
It is suitable for waterproof sealing of gaps in various indoor and outdoor smart LED lampssmart ceiling lampswaterproof smart street lamps and other lighting productspreventing water vapor a...
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Volume Resistivity
1.2×10^15 Ω·cm
Dielectric Strength21 kV/mm
Elongation at Break650 %
Thermal Conductivity0.22 W/(m·K)
Relevant CertificationRoHS 2.0, FDA 21CFR, LFGB, IP67 Waterproof Compatibility Certification
Working Temperature Range-40℃~180℃
Linear Expansion Coefficient2.5×10^-4 /℃
LSR Waterproof Seal For Smart Lamps is a precision-molded liquid silicone rubber (LSR) sealing component designed specifically for indoor and outdoor smart lighting applications, developed and manufactured by 橡楚(湖北)橡胶有限公司. As a professional producer of Liquid Silicone Rubber (LSR) products, we engineer these seals to meet the critical requirements of long-term water and dust resistance for smart lamp assemblies, while maintaining stable physical and mechanical properties across a wide range of operating temperatures.
Unlike conventional rubber seals that harden, crack, or degrade after prolonged exposure to outdoor elements or repeated temperature cycling, our LSR waterproof seals leverage the inherent advantages of high-purity liquid silicone rubber to deliver consistent sealing performance over the entire service life of smart lighting products. The seals are molded via precision compression and injection molding processes to achieve tight dimensional tolerances, ensuring a snug, reliable fit between lamp housings, diffusers, mounting bases, and cable entry points, which are the most common leak points in smart lamp designs.
Our LSR waterproof seals for smart lamps comply with international environmental protection standards, are free of harmful phthalates, heavy metals, and volatile organic compounds (VOCs), making them suitable for both residential and commercial smart lighting installations. Whether used in outdoor garden smart lamps, bathroom vanity smart lights, underwater smart pool lighting, or industrial smart warehouse lighting, our seals provide durable, long-lasting waterproof protection.
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Technical Specifications
Material Properties
Our LSR waterproof seals are produced from 100% pure food-contact or industrial-grade liquid silicone rubber, with the following base material properties:
ParameterValueTest Standard
Material CompositionAddition-cured polydimethylsiloxane (PDMS) Liquid Silicone RubberASTM D1418
ColorCustom (standard: black, white, gray; custom colors available on request)Visual Inspection
OdorOdorlessSensory Testing
Flammability RatingSelf-extinguishing UL 94 HB (V-0 available on request)UL 94
Temperature Resistance Range-40°C to 200°C (-40°F to 392°F)ASTM D573
Physical Performance
Finished seals undergo full performance testing to confirm the following physical properties:
ParameterTypical ValueTest Standard
Hardness Range30 Shore A to 70 Shore A (custom hardness available)ASTM D2240
Tensile Strength5.0 MPa to 9.0 MPaASTM D412
Elongation at Break300% to 650%ASTM D412
Compression Set (24h @ 100°C)≤12%ASTM D395 Method B
Water Absorption (24h @ 25°C)≤0.6%ASTM D570
Ingress Protection RatingUp to IP68 when correctly installedIEC 60529
Aging Resistance (1000h @ 150°C hot air)Hardness change ≤ ±5 Shore A, tensile strength retention ≥90%ASTM D865
Ozone ResistanceNo cracking after 100h testingASTM D1149
Process Parameters
All seals are produced with controlled manufacturing parameters to ensure consistent quality:
Process StepParameter Specification
Molding MethodPrecision liquid injection molding (for high volume, complex geometry) / compression molding (for low volume, large size)
Dimensional Tolerance±0.05 mm for dimensions <100 mm; ±0.1 mm for dimensions 100–300 mm (tighter tolerances available on request)
Post-Curing4 hours at 150°C to eliminate residual volatile components
Surface FinishSmooth, matte finish (R_a ≤ 1.6 μm)
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Product Advantages
Long-Term Durability in Harsh Environments
Unlike thermoplastic elastomer (TPE) and general-purpose rubber seals, our LSR seals retain elasticity and sealing performance even after prolonged exposure to UV radiation, rain, extreme temperatures, and atmospheric ozone. They do not crack, shrink, or swell over time, reducing the risk of water ingress and extending the service life of smart lamps, which lowers maintenance and replacement costs for end users.
Precision Customization for Unique Lamp Designs
As an LSR product manufacturer, we offer full customization of size, shape, hardness, and color to match the specific design requirements of any smart lamp, from small bulb-shaped smart lamps to large linear outdoor smart lighting fixtures. Our precision molding processes accommodate complex geometries including irregular cutouts, integrated mounting tabs, and multi-lobed cross-sections to fit all common lamp assembly designs.
Safe and Non-Toxic for All Applications
All our LSR materials are tested to meet RoHS and REACH environmental requirements, and food-grade options are available for smart lamps used in food preparation areas, residential children’s spaces, and public environments. The material does not release harmful substances even when exposed to long-term sunlight or elevated temperatures, meeting global safety standards for consumer electronics.
Consistent Sealing Performance Across Temperature Cycles
The low compression set of our LSR material ensures that the seal maintains consistent contact pressure between mating components even after repeated temperature fluctuations, which is a common cause of seal failure in outdoor applications. This consistent pressure prevents water and dust ingress over the full service life of the smart lamp.
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Applications
Our LSR Waterproof Seals For Smart Lamps are suitable for a wide range of smart lighting applications, including:
Outdoor Smart Lighting: Outdoor garden smart lamps, street smart lights, courtyard wall-mounted smart lamps, and balcony smart lighting, providing long-term resistance to rain, snow, and dust.
Wet Indoor Locations: Bathroom smart vanity lights, kitchen under-cabinet smart lighting, and laundry room smart fixtures, resisting moisture from steam, splashing water, and high humidity.
Underwater Lighting: Underwater smart pool lights, fountain smart lighting, and aquarium smart lamps, providing IP68-rated waterproof protection for permanent submerged use.
Commercial and Industrial Smart Lighting: Warehouse high-bay smart lamps, parking garage smart lighting, and outdoor billboard smart lighting, withstanding temperature fluctuations and dust accumulation in industrial environments.
Residential Smart Lighting: Ceiling smart lights, table smart lamps, and smart night lights, providing moisture protection for bathroom and kitchen installations while maintaining a clean, aesthetic appearance.
Common mounting positions for our seals include: between the lamp housing and diffuser, around cable entry points, between the mounting base and wall/ceiling, and around the lamp’s control module compartment.
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Selection Guide
Hardness Selection
We recommend selecting seal hardness based on your assembly design and application requirements:
30–40 Shore A: Ideal for irregular mating surfaces or applications where low assembly force is required. The softer material conforms to small surface imperfections to improve sealing.
40–60 Shore A: The most common general-purpose hardness, suitable for most smart lamp applications. Balances good conformability and long-term compression resistance.
60–70 Shore A: Recommended for large seals or applications requiring high mechanical rigidity and resistance to compression, such as large outdoor linear smart lighting fixtures.
Size Specifications
We offer custom sizing to match any smart lamp design, with the following common size ranges available:
Small seals: Inner diameter 10–100 mm, for round smart bulb fixtures and small spotlights
Medium seals: 100–300 mm, for square and round ceiling smart lamps
Large custom seals: Up to 1000 mm, for long linear outdoor smart lighting fixtures and large pool lamps
We can produce seals in any custom shape (round, square, rectangular, irregular) per customer-provided 2D drawings or 3D CAD models.
Material Grade
Select the appropriate material grade based on your application:
Industrial Grade: Suitable for general outdoor and industrial smart lighting applications, meets all standard performance and environmental requirements.
Food-Grade: Suitable for smart lamps installed in food processing areas, residential kitchens, and children’s spaces, meets food contact safety standards.
High-Flame-Retardant Grade: Suitable for commercial and industrial applications requiring strict flammability compliance, offering UL 94 V-0 flammability rating.
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Quality Assurance
橡楚(湖北)橡胶有限公司 operates a quality management system certified to ISO 9001, with strict quality control implemented at every stage of production, from raw material incoming inspection to finished product outgoing testing. Every batch of LSR waterproof seals undergoes performance testing for hardness, dimensions, compression set, and visual defects before shipment to ensure compliance with specified requirements.
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, where we maintain controlled manufacturing conditions to ensure consistent product quality. We work closely with customers to resolve design and application challenges, and provide full technical support for integration into smart lamp assemblies.
For inquiries about custom specifications, samples, or bulk orders, please contact us at: