This product adopts liquid silicone rubber overmolding process, suitable for ceramic workpieces. It provides buffer protection against impact and collision, with excellent temperature resistance, insulation stability, good sealing performance and durability. It can be customized according to workpiece sizes for various application scenarios.
Material
Industrial LSR
Hardness
Shore A 30-70
Temperature
Certifications
Applications
-40°C ~ +200°C
Colors
Black, White, Gray, Customizable
# Liquid Silicone Rubber Overmolded Ceramic Sleeve
*High-performance LSR overmolded protective sleeve for ceramic structural components*
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Liquid Silicone Rubber (LSR) overmolded ceramic sleeves are engineered protective components that combine the high hardness, high temperature resistance, and dielectric strength of structural alumina/zirconia ceramics with the elasticity, sealing performance, and impact cushioning of medical-grade liquid silicone rubber. This product is manufactured via precision injection overmolding, which achieves a chemical covalent bond between the LSR outer layer and ceramic inner core—eliminating delamination risks common to mechanical assembly or adhesive bonding processes.
Our overmolded ceramic sleeves are designed to address the core pain points of unprotected ceramic components: high brittleness, susceptibility to impact fracture, poor sealing compatibility with metal/plastic mounting interfaces, and vulnerability to chipping during installation and use. By integrating a customized LSR overmolded outer jacket, we retain all the excellent inherent properties of ceramic while adding critical functional improvements that extend component service life by 3–5 times in most industrial applications. Core selling points include zero delamination bonding, customizable dimensions and hardness, compliance with food and medical grade standards, and stable performance in extreme temperature and corrosive environments.
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Unlike traditional assembly methods that rely on adhesive bonding or press fitting between ceramic and rubber, our overmolding process integrates plasma activation of the ceramic surface followed by in-situ injection molding of LSR. This forms a stable covalent bond between the silicone and ceramic, eliminating interface delamination even after long-term thermal cycling or immersion in corrosive fluids. Our accelerated aging tests show no detectable bonding strength reduction after 1000 cycles between -40°C and 120°C.
The inner ceramic core retains the outstanding high-temperature resistance, wear resistance, dielectric insulation, and structural rigidity of ceramic materials, while the outer LSR jacket provides elastic cushioning, impact absorption, and customizable sealing performance. This combination solves the problem of ceramic's brittleness without compromising its core functional advantages, making it suitable for harsh working environments that neither single ceramic nor single rubber can withstand.
We source raw materials from international leading silicone and ceramic suppliers, and all standard products meet FDA food contact safety requirements, ISO 10993 biological compatibility for medical applications, and RoHS 2 environmental regulations. Custom formulations are also available for applications requiring flame retardancy (UL 94 V-0 rating) or low outgassing for vacuum and aerospace environments.
We support full customization of inner diameter, outer diameter, length, LSR jacket thickness, LSR hardness, and surface texture to match specific application requirements. Whether you need a thin-walled small-size sleeve for a medical surgical instrument or a thick overmolded sleeve for high-pressure industrial equipment, our precision manufacturing process can meet the dimensional and performance requirements.
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Our LSR overmolded ceramic sleeves are widely used in multiple industries that require structural strength, insulation, and impact resistance:
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Standard stock sizes are available for inner diameters ranging from 3 mm to 50 mm, with outer diameters 1 mm–5 mm larger than the inner diameter, and lengths ranging from 10 mm to 200 mm. For sizes outside the standard range, we accept custom orders with a minimum order quantity (MOQ) of 50 pieces for non-standard specifications. Dimensional tolerances can be tightened to ±0.01 mm for high-precision applications upon request.
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All LSR overmolded ceramic sleeves are subject to 100% incoming inspection of raw materials, in-process dimensional inspection, and final outgoing inspection before delivery. Our quality management system is certified to ISO 9001:2015 and ISO 13485:2016 for medical device components. Each batch of products comes with a material test report (MTR) and certificate of compliance, detailing material composition, physical performance test results, and regulatory compliance status.
We perform 100% non-destructive interface bonding inspection on each product using ultrasonic testing to eliminate any unbonded or delaminated defective products. For custom products, we provide pre-production sample confirmation for dimensional and performance testing before mass production, with free sample replacement for non-conforming products. Our 12-month performance warranty covers manufacturing defects and material quality issues, ensuring long-term reliable operation in customer applications.
