This liquid silicone rubber seal ring produced by Xiangchu is designed for smart door lock fingerprint modules. It features excellent waterproof and sealing performance, good resilience and aging resistance. We support customization of size and hardness, meeting standard quality requirements for smart lock assembly.
Material
Industrial LSR
Hardness
Shore A 30-60
Temperature
-40°C ~ +200°C
Colors
Black, White, Transparent, Customizable
Certifications
Applications
# LSR Seal Ring For Smart Door Lock Fingerprint Module
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The LSR Seal Ring for Smart Door Lock Fingerprint Module is a precision-molded liquid silicone rubber sealing component manufactured by 橡楚（湖北）橡胶有限公司, designed exclusively to protect sensitive fingerprint recognition modules in residential, commercial, and smart home door lock systems. As a specialized Liquid Silicone Rubber (LSR) product from our production line, this seal ring creates a reliable, long-lasting barrier against common environmental contaminants that can compromise fingerprint sensor performance, including dust, water vapor, sweat, and accidental liquid splashes.
Developed to meet the tight dimensional tolerances and demanding durability requirements of smart lock manufacturers, this seal ring fits precisely between the fingerprint module sensor and the lock panel, maintaining consistent compression set resistance over millions of door lock actuation cycles. Unlike generic rubber seals, our LSR formulation is engineered to preserve fingerprint sensor sensitivity while blocking unwanted intrusions, ensuring reliable biometric recognition in all common indoor and outdoor operating environments.
Our production 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 utilizes precision LSR injection molding to achieve consistent part geometry and tight tolerances, eliminating the inconsistencies common to cut or molded general-purpose rubber seals. Each seal ring is produced under controlled manufacturing processes to meet the quality requirements of high-volume smart lock production lines, with uniform material properties across every production batch.
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This seal ring is manufactured from 100% pure food-grade liquid silicone rubber (LSR) with no recycled fillers or additives. Key material properties are listed below:
All physical performance values are tested per standard ASTM D2000 procedures for silicone rubber products:
As a precision injection-molded LSR component, our production adheres to the following process control parameters to ensure consistent quality:
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Unlike harder rubber or plastic seals that can create a thick barrier between the user’s finger and the sensor, our 30 Shore A LSR formulation offers optimal softness and surface conformity. The thin, uniform profile of the seal ring does not interfere with capacitive or optical fingerprint sensor signal transmission, ensuring consistent recognition accuracy even after years of daily use. The non-stick silicone surface also prevents oil, skin residue, and dust from accumulating, reducing cleaning requirements and maintaining sensor performance.
LSR’s inherent resistance to temperature extremes, aging, and repeated compression means our seal rings maintain their sealing performance and shape for the entire 10+ year service life of a smart door lock. With a compression set of less than 12%, the seal ring will not permanently deform or lose its sealing ability after millions of compression cycles from door opening and closing, eliminating the risk of water or dust intrusion that can cause premature sensor failure.
Our LSR formulation is free of BPA, phthalates, lead, and other restricted hazardous substances, meeting global regulatory requirements for consumer electronics and residential hardware. The material does not release volatile organic compounds (VOCs) under normal operating conditions, making it safe for use in residential environments where the lock is frequently touched by users.
All seal rings are produced with tight dimensional tolerances that allow for high-speed automated assembly on smart lock production lines, reducing assembly time and minimizing fit issues. The uniform material properties and consistent geometry eliminate the need for manual sorting or adjustment during production, lowering overall manufacturing costs for lock producers.
The hydrophobic silicone material repels water, sweat, hand oils, and cleaning chemicals commonly encountered in residential use. It does not swell or degrade when exposed to hand soaps, disinfectants, or minor liquid splashes, ensuring consistent performance in high-traffic entryways and bathroom doors.
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This LSR seal ring is designed specifically for sealing fingerprint recognition modules in all types of smart door locks, including:
Beyond smart door lock fingerprint modules, this seal ring can also be used for similar sealing applications in other small biometric devices, including fingerprint access control readers, safe biometric locks, and automotive biometric door handles, where a compact, durable sealing component is required to protect sensitive sensor electronics.
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We offer the standard 30 Shore A hardness for most smart lock applications, which provides optimal sealing performance and minimal interference with sensor sensitivity. For applications requiring extra mechanical support for larger sensor modules, 40 Shore A hardness is available upon request.
Our standard off-the-shelf size fits the most common circular fingerprint module designs:
All our LSR seal rings are produced with our base medical-equivalent LSR grade, which meets all global consumer product safety standards. For clients with specific regulatory requirements (such as REACH or RoHS compliance), we can provide material test reports upon request. We do not offer lower-cost lower-grade material options for this product, as maintaining consistent performance and safety is our top priority.
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橡楚（湖北）橡胶有限公司 operates a quality management system certified to ISO 9001, with rigorous quality control checks implemented at every stage of production, from raw material incoming inspection to final pre-shipment part inspection. Each production batch undergoes testing for hardness, dimensional accuracy, compression set, and visual defects to ensure all products meet the specified technical requirements.
Raw materials are sourced only from approved global silicone suppliers with documented traceability, and each batch of raw material is tested for conformity before entering production. All finished seal rings are 100% visually inspected to identify and remove any parts with flash, deformation, or surface defects before packaging.
For OEM clients, we can provide first article inspection reports, material test certificates, and batch quality records upon request. Our production facility 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 maintains detailed production and quality records for every order, allowing full traceability for the lifetime of the product.
If you have questions about product specifications, custom sizing, or ordering, please contact us at 18071171144 or email churubber@163.com for technical support.
