This LSR dust plug overmolding for LED lighting is produced by Xiangchu (Hubei) Rubber Co., Ltd. Adopting liquid silicone injection molding, it provides good sealing performance for dust and water protection. It supports custom specifications and meets ISO 9001 quality requirements.
Material
Industrial LSR
Hardness
Shore A 30-60
Temperature
Certifications
Applications
-40°C ~ +150°C
Colors
Black, White, Transparent, Customizable
# LSR Dust Plug Overmolding For LED Lighting
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LSR (Liquid Silicone Rubber) dust plug overmolding is a custom precision sealing component designed specifically for LED lighting systems to address common failure points caused by dust, moisture, and environmental contamination. 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, this overmolded component combines the excellent elastic and sealing properties of food-safe medical-grade LSR with rigid substrate inserts to create a durable, integrated sealing solution for all types of indoor and outdoor LED lighting assemblies.
Unlike separate cut rubber gaskets or adhesive-backed seals, our overmolding process bonds LSR directly to metal, plastic, or PCB substrates during manufacturing, eliminating gaps between the seal and the mating surface that can allow contaminants to enter. This one-piece integrated design also simplifies assembly for lighting manufacturers, reducing installation time and the risk of misalignment during production. Our LSR dust plug overmolding maintains stable sealing performance across a wide temperature range, resists UV degradation, and retains elasticity even after years of continuous exposure to outdoor weathering, making it ideal for both commercial and residential LED lighting applications.
All our LSR dust plug overmolding components are produced from 100% pure virgin platinum-cured liquid silicone rubber, with no recycled filler materials added. Key material properties are listed below:
Finished overmolded dust plugs meet the following performance standards:
Our LSR injection overmolding process maintains tight tolerances to meet the precision requirements of LED lighting assemblies:
LSR’s inherent resistance to moisture, ozone, and UV radiation means our overmolded dust plugs do not crack, harden, or shrink over time, unlike conventional organic rubber seals. The bonded overmolding design eliminates the gap between the seal and the substrate that often occurs with press-in or adhesive gaskets, providing consistent IP rating sealing to prevent dust from accumulating on LED chips and driver circuits. This reduces lumen degradation over the product lifetime and extends the service life of the entire LED fixture.
Our precision liquid injection molding process can produce custom overmolded dust plugs with complex contours, through-holes, and integrated mounting features that match the exact design of your LED lighting assembly. The low viscosity of raw LSR allows it to fill thin gaps and detailed mold cavities completely, ensuring consistent part quality across high-volume production runs. This level of precision eliminates the need for post-molding trimming or adjustment, and ensures each component fits perfectly into your assembly line.
Platinum-cured LSR does not contain corrosive additives or volatile organic compounds (VOCs) that can damage LED chips, sensitive driver electronics, or plastic housing materials. The low compression set of our LSR ensures the seal maintains consistent contact pressure even under long-term temperature cycling, preventing loosening that can compromise sealing. LSR also has excellent insulation properties, providing additional electrical insulation between the LED assembly and the external housing, improving overall product safety.
As an integrated overmolded component, our dust plugs require no additional cutting, adhesive, or alignment during fixture assembly. They can be directly installed into your automated production line, reducing labor time and eliminating the waste associated with cutting generic gasket material. The long service life of LSR also reduces warranty claims and after-sales maintenance costs for your lighting products.
LSR overmolded dust plugs for LED lighting are used across a wide range of indoor and outdoor lighting applications, including:
The overmolding design allows customization to fit almost any opening or port in an LED fixture, including driver wiring ports, mounting holes, access panels, and junction box connections. It can be molded to match any custom shape required by your fixture design, ensuring full coverage of any opening that could allow contamination to enter.
Hardness is selected based on your sealing requirements and assembly method:
All our LSR dust plug overmolding components are custom manufactured to match your CAD drawings and product specifications. We support prototyping for new product development, with low minimum order quantities for testing and sample validation, before moving to full high-volume production. We can accommodate any size within our maximum molding capacity of 300 mm × 200 mm.
We offer three standard material grades to match different application requirements:
橡楚（湖北）橡胶有限公司 operates a quality management system certified to ISO 9001, with rigorous quality control checks at every stage of production from raw material incoming inspection to finished product outgoing testing. Each batch of LSR raw material is tested for hardness, tensile strength, and purity before molding, and each finished overmolded component is inspected for dimensional accuracy, bonding quality, and surface defects to ensure compliance with customer specifications.
We can provide material test reports (MTR) and compliance documentation for all relevant international standards upon request. 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, and we work with lighting manufacturers around the world to deliver consistent, high-quality custom LSR overmolded components. For inquiries or to request a sample quote, contact us at phone: +86 18071171144, email: churubber@163.com.
