This liquid silicone rubber overmolding part for smart door lock handle is produced by Xiangchu Rubber. It features non-slip comfortable grip, wear resistance, high and low temperature resistance and good sealing performance, meets ISO 9001 standards, supports customization of color, size and hardness.
Material
Industrial LSR
Hardness
Shore A 30-60
Temperature
-40°C ~ +180°C
Colors
Black, White, Transparent, Customizable
Certifications
Applications
# LSR Overmolding Part for Smart Door Lock Handle
Manufactured by 橡楚（湖北）橡胶有限公司
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The LSR overmolding part for smart door lock handles is a custom-molded liquid silicone rubber (LSR) component designed to improve the ergonomics, durability, and user experience of residential and commercial smart door locks. Produced 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 overmolding part is bonded directly to the underlying metal or plastic handle substrate during injection molding, creating a permanent, seamless integration that eliminates assembly steps and reduces long-term failure risks.
As a specialized manufacturer of liquid silicone rubber products, we engineer these overmolding parts to address common pain points of uncoated smart lock handles: slippery surfaces in wet or cold conditions, temperature-induced discomfort, metal corrosion from hand sweat, and cosmetic scuffing from daily use. Our precision injection molding process ensures consistent wall thickness, exact dimensional tolerances, and a smooth, non-porous surface that meets the performance requirements of modern smart locking systems. Each part can be customized to match specific handle designs, color specifications, and ergonomic profiles required by smart lock manufacturers.
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Our LSR overmolding parts are manufactured from high-purity addition-cure liquid silicone rubber, with the following core material properties:
Finished overmolding parts are tested to meet the following performance standards for long-term smart lock use:
Our overmolding process follows standardized parameters to ensure consistent bonding and part quality:
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Our LSR overmolding process is optimized for adhesion to common smart door lock handle substrates, including aluminum alloy, stainless steel, PC, ABS, and glass-filled nylon. Unlike secondary assembly of rubber grip sleeves that can loosen, crack, or detach over time, our overmolded part forms a chemical and mechanical bond with the base handle, eliminating product failure from grip separation even after years of daily use.
LSR’s inherent properties make it resistant to hand sweat, skin oils, household cleaning chemicals, and UV exposure from outdoor door installations. The non-porous surface resists staining, discoloration, and bacterial growth, retaining its cosmetic appearance and performance for the full service life of the smart lock. Unlike thermoplastic elastomers (TPE), LSR does not become brittle in cold weather or sticky in high-temperature environments, maintaining consistent feel and function year-round.
The soft, non-slip surface of our LSR overmolding provides a comfortable, secure grip even when hands are wet or cold, reducing the risk of accidental slips when operating the door lock. LSR is non-toxic and hypoallergenic, making it safe for frequent contact with human skin, with no leaching of harmful chemicals over time. The material also dampens vibration and reduces operating noise for a premium user experience.
We support full customization of overmolding shape, wall thickness, color, and surface texture to match any smart door lock handle design. Matte, semi-gloss, and textured surface finishes are available to meet aesthetic requirements, and custom colors can be matched to Pantone or RAL color standards to align with brand identity.
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LSR overmolding parts for smart door lock handles are designed for use across all segments of the smart lock market, including:
The non-slip, temperature-resistant properties of LSR make it particularly well-suited for smart locks installed in high-humidity environments (such as bathroom doors) or unconditioned outdoor spaces, where alternative materials often degrade prematurely.
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The right hardness for your overmolding part depends on your product design and user experience requirements:
All of our LSR overmolding parts are custom manufactured to match the exact dimensions of your smart door lock handle design. We support handle lengths from 50 mm to 200 mm and overmolding wall thickness from 1.5 mm to 5 mm, with standard dimensional tolerance that meets the assembly requirements of most smart lock designs. For high-precision applications, tighter tolerances can be accommodated upon request.
We offer two standard material grades to match different application requirements:
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At 橡楚（湖北）橡胶有限公司, we operate 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 part testing. Every batch of LSR overmolding parts undergoes the following quality checks before shipment:
We maintain full production traceability for all orders, and our technical team is available to support custom testing requirements to match your product certification needs.
For inquiries about custom LSR overmolding parts for smart door lock handles, contact us at:
