LED Gasket Liquid Silicone Overmolded Part

# LED Gasket Liquid Silicone Overmolded Part

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Product Overview

The LED Gasket Liquid Silicone Overmolded Part from 橡楚（湖北）橡胶有限公司 is a custom-engineered sealing component manufactured via precision liquid silicone rubber (LSR) overmolding, designed specifically to meet the harsh environmental protection requirements of LED lighting systems. As a professional manufacturer focused on custom Liquid Silicone Rubber (LSR) products, we leverage our advanced LSR injection overmolding process to bond silicone rubber directly to plastic, aluminum, or ceramic LED substrates, forming an integrated, gap-free sealing structure that eliminates the risk of adhesive failure and delamination common with post-assembled gaskets.

This product delivers reliable long-term sealing against dust, moisture, water intrusion, and temperature fluctuation, while retaining excellent light diffusion and electrical insulation properties that do not interfere with LED performance. Our overmolded gaskets are customizable to fit any LED housing geometry, from small miniature downlights to large outdoor billboard LED panels, supporting both low-volume prototype development and high-volume mass production to match customer project requirements.

Technical Specifications

Material Properties

All our LED gasket overmolded parts use food-contact and industrial-grade raw liquid silicone rubber, with the following core material properties:

Physical Performance

Finished overmolded parts meet the following performance specifications:

Process Parameters

Our overmolding process follows controlled manufacturing parameters to ensure consistent part quality:

• Molding Temperature: 160°C-180°C
• Injection Pressure: 5-12 MPa
• Cycle Time: 30-120 seconds (adjusted per part size and thickness)
• Adhesion Strength to substrate: >1.5 MPa (peel test)

Product Advantages

1. Integrated Sealing Structure Eliminates Leakage Risks

Unlike cut gaskets or manually assembled adhesive-bonded seals, our LSR overmolding process forms a permanent molecular bond between silicone and the LED housing substrate. This eliminates assembly gaps, prevents gasket displacement during installation and use, and delivers far more reliable long-term sealing than traditional solutions. The seamless structure also avoids the accumulation of dust and moisture in gaps, extending the service life of the entire LED assembly.

2. Excellent Environmental Adaptability for Long-Term Outdoor Use

Raw platinum-cured LSR provides outstanding resistance to UV radiation, ozone, extreme temperature fluctuation, and humidity, with no cracking, hardening, or compression set after years of outdoor exposure. This stability ensures the sealing performance of the gasket remains consistent throughout the 50,000+ hour service life of the LED system, avoiding the maintenance costs and safety hazards caused by seal aging failure.

3. Customizable Geometry for Complex LED Housing Designs

Our precision LSR injection overmolding process supports production of complex gasket shapes including irregular contours, stepped sections, and thin-wall structures to match custom LED housing designs. We can achieve tolerances as low as ±0.05 mm, ensuring a perfect fit for high-precision LED assemblies. We also support custom adjustments to hardness, thickness, and color to meet specific functional and aesthetic requirements of different LED products.

4. Non-Interference with LED Performance

LSR itself is non-conductive, so the overmolded gasket will not cause short circuits or electromagnetic interference with LED circuit boards. The silicone material also has stable refractive index and optional light diffusion properties, which will not cause uneven light output or yellowing that affects lighting effect, unlike many organic rubber materials that degrade and discolor over time under LED illumination.

Applications

LED Gasket Liquid Silicone Overmolded Parts are suitable for a wide range of indoor and outdoor LED lighting applications, including:

• Outdoor LED lighting: Street lights, landscape floodlights, tunnel lights, solar LED garden lights, and offshore platform lighting, where the gasket provides IP65+ water and dust protection against rain, fog, salt spray, and extreme weather.
• Architectural LED systems: Curtain wall LED modules, glass LED light panels, and outdoor billboard LED displays, where long-term UV resistance and structural sealing prevent water intrusion into display panels.
• Industrial LED equipment: Explosion-proof LED lights, machine tool working lights, mining LED lighting, and low-temperature cold storage LED lights, where the gasket adapts to extreme working temperatures and provides reliable electrical insulation.
• Automotive LED lighting: LED headlights, taillights, daytime running lights, and interior ambient lighting, where resistance to vibration, engine compartment temperature changes, and automotive fluids maintains sealing performance over the vehicle service life.
• Consumer and commercial LED: Waterproof LED bathroom mirrors, outdoor smart LED door locks, and underwater LED pool lights, where the gasket meets daily water exposure and safety requirements.

Selection Guide

Hardness Selection

Choose the appropriate silicone hardness based on your installation and sealing requirements:

• 30-40 Shore A: Suitable for applications requiring high compression resilience and conformability to irregular housing surfaces, ideal for large-size LED panels where uneven substrate gaps need to be compensated.
• 40-55 Shore A: General-purpose hardness for most indoor and outdoor LED sealing applications, balancing compression resistance and conformability, the most commonly selected option for standard LED gaskets.
• 55-70 Shore A: Suitable for applications requiring high structural rigidity and compression set resistance, such as LED assemblies that require frequent disassembly for maintenance or experience long-term high compression loads.

Size Specifications

We do not maintain standard off-the-shelf sizes for overmolded LED gaskets, as these parts are custom matched to your specific LED housing geometry. We accept production based on your 2D engineering drawings or 3D CAD files, and can provide sample prototyping services before mass production to verify fit and sealing performance. The maximum part size we can produce is 600 mm × 600 mm, and we support minimum wall thickness as low as 0.5 mm.

Material Grade

We offer two standard material grades to meet different application requirements:

• Industrial Grade: Suitable for general industrial and outdoor LED applications, meets all standard sealing and aging performance requirements, available in standard black or gray color.
• Low-VOC Food-Contact Grade: Compliant with FDA 21 CFR 177.2600, suitable for LED lighting used in food processing facilities, residential bathroom products, and other applications with strict volatile organic compound requirements.

Quality Assurance

橡楚（湖北）橡胶有限公司 operates a complete quality management system certified to ISO 9001, with strict quality control implemented across every stage from raw material incoming inspection to finished product outbound testing. All raw LSR materials are sourced from qualified suppliers with material test reports, and every batch of finished overmolded parts undergoes routine testing including: dimensional accuracy inspection, adhesion peel testing, compression set testing, and accelerated aging testing to ensure compliance with specified performance requirements.

We are 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, and we focus on delivering high-quality custom LSR products to global customers. For custom inquiries, sample requests, or technical questions, please contact us at phone: 18071171144 or email: churubber@163.com, and our technical team will provide professional solutions within 2 working days.