3Axis specializes in optimizing the tooling process for liquid silicone molding. The company enhances efficiency by stocking mold bases, simplifying mold design, and employing high-speed 3D machining. They provide comprehensive solutions for manufacturing precision silicone components.
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Silicone Molding Companies
Last updated: January 2026
This directory lists 60 silicone molding companies across the United States, from specialized LSR injection molders catering to intricate, high-volume parts to HCR compression molders focused on durable, larger components.
Buyers leverage these specialized manufacturers to solve a myriad of design challenges: achieving precise sealing and gasketing against environmental ingress, integrating haptic feedback components, developing biocompatible parts for implantable devices, or creating flexible components with consistent durometer and high tensile strength. The expertise lies in managing complex material flow, preventing flash, and ensuring critical properties are met consistently.
The types of suppliers in this ecosystem vary significantly. Some specialize exclusively in LSR injection molding, offering advanced tooling design for intricate parts and automated handling. Others focus on HCR compression or transfer molding, excelling in robust, high-durability components. You'll also find integrated contract manufacturers providing secondary operations like sub-assembly, pad printing, and even cleanroom packing, differentiating them from pure molders.
To engage these suppliers effectively, come prepared with detailed CAD models, precise material specifications including specific silicone grades (e.g., specific Shore A durometer), annual volume forecasts, and clearly defined critical-to-quality (CTQ) dimensions. Be ready to discuss tolerance requirements, desired surface finishes, and any specific testing protocols related to biocompatibility or chemical resistance that your application demands.
Company Directory
60 companies nationwide
Based in Palatine, IL, Advanced Prototype Molding offers superior custom molding services for prototype through full production. They specialize in producing high-precision parts with tight tolerances, including rubber and silicone components. Additional services encompass injection molding, cast urethanes, CNC machining, and design consultation.
Based in Los Angeles, CA, Ames Rubber Manufacturing offers over 70 years of experience in custom rubber products. They provide molded, extruded, die cut, and lathe cut rubber gaskets, seals, and components. Their capabilities include molded silicone products, such as isolating phase bus diaphragms, supporting various industrial elastomeric requirements.
American Medical Molding, based in Houston, TX, specializes in precision molding services for the medical device industry. They offer complex overmolding, prototype to high-volume production, and cleanroom manufacturing within their ISO 13485 certified Class 8 facility. Services include material selection, tooling oversight, automation, and validation studies for various medical devices.
Biomerics is a contract manufacturing partner specializing in polymer and metal expertise, offering end-to-end capabilities from design to finished medical devices. Their services include overmolding and in-house polymer custom compounding for complex interventional components.
Based in Amesbury, MA, Bold Maker specializes in manufacturing FDA-approved and BPA-free platinum silicone molds. They offer hundreds of in-stock designs and custom mold projects for gummies, candies, chocolate, and other confectionery products, serving professionals and teams worldwide.
Casco Bay Molding, based in Sanford, ME, is an ISO 13485:2016 Certified product development and injection molding facility. They offer in-house tooling, design, and high-volume silicone and thermoplastic production. The company specializes in Class I and II medical device components, serving the medical device industry.
Based in Irvine, CA, California Sealing Solutions, Inc. specializes in custom parts and sealing components. They offer comprehensive manufacturing services, including custom molded rubber, plastic injection molding, and metal stampings. The company supports clients from concept to production, providing design engineering expertise for diverse material solutions.
Based in Sacramento, CA, CLEBAE Infinique Tooling & Molding is a plastics manufacturer specializing in high-volume, high-quality products. They offer comprehensive services including plastic injection, overmolding, compression, and silicone molding. The company also provides custom automation and assembly services for diverse customer needs.
Based in Diamond Bar, CA, Coi Rubber Products, Inc. is a US-based rubber molding manufacturer. The company specializes in custom rubber, plastic, and thermoplastic products using molding, extrusion, and rubber-to-metal bonding. They serve diverse sectors including automotive, industrial, food processing, and HVAC.
Based in Springfield, IL, C.T. Gasket & Polymer Co. offers high-precision silicone contract molding. With over 100 years of expertise, they utilize compression, transfer, and injection molding to produce custom silicone parts, gaskets, O-rings, and seals for various industrial applications.
Based in Cypress, CA, Endose Molds specializes in creating custom silicone candy molds for various applications. The company also provides professional gummy formulation SOPs, advanced nutraceutical gummy development, and one-on-one consulting for gummy manufacturing. They offer a range of candy making supplies to support clients.
Based in Corona, CA, Elastomer Technologies, Inc. specializes in custom elastomer manufacturing. They provide a range of molding services including compression, transfer, injection, and liquid injection molding, alongside high-speed die-cutting solutions. Serving diverse industries since 1975, they focus on creating high-quality engineered parts.
Based in San Clemente, CA, IRP Medical specializes in molding Critical-To-Function (CTF) engineered elastomeric components for the Medical Device Industry. They offer scalable solutions, from prototype to high-volume production, utilizing tested molding and processing technology. The company, which is ISO 13485 certified and FDA registered, now also provides silicone extrusions.
Based in Brea, CA, Kingson Mold and Machine Inc. specializes in liquid silicone rubber mold making solutions. They provide integrated services including part design, tooling design, prototyping, and production tooling. The company serves the medical, aerospace, automotive, electronic, and consumer industries.
Based in Valencia, CA, LMP Rubber provides high-quality, precision molded rubber products through compression and transfer molding. They specialize in high-performance elastomers including Silicone, Fluorosilicone, Viton, and Nitrile. Serving industries such as Aerospace, Semiconductor, Industrial, Automotive, and Biomedical, LMP offers custom parts from prototypes to full production.
Molding Dynamics Inc. provides custom injection molding services, specializing in Liquid Silicone Rubber (LSR) molding, plastic injection molding, and overmolding. Based in Bedford, OH, they offer comprehensive engineering, prototyping, and production for diverse industries. The company delivers precision-molded components for medical, automotive, and industrial applications.
Based in Lancaster, NY, Moldtech Rubber is a vertically integrated manufacturer specializing in high-quality rubber and silicone molding services. Capabilities include LSR and HCR silicone molding, rubber injection molding, overmolding, and micro molding. They produce essential components such as seals, gaskets, and hoses for diverse industrial applications.
Based in Burleson, TX, Newnak's Plastics LLC is a US manufacturer specializing in silicone mold making and resin casting. This family-owned company provides custom plastic molding solutions, including thermal vacuum forming, centrifugal casting, and 3D printing. They process materials like silicone, polyester, and urethane for clients nationwide.
Based in South El Monte, CA, Point Industrial, LLC manufactures rubber and plastics, specializing in custom compression, injection, transfer, and thermoset molding. They also provide rubber-to-metal bonding, serving diverse sectors including automotive, food, and medical, with IATF 16949 certification.
Based in Plymouth, MN, ProMed Molded is a contract manufacturer specializing in complex, intricately designed molded silicone and plastic components and assemblies. They serve highly regulated industries including medical devices, pharmaceutical dosage forms, and security and defense, providing comprehensive services from prototype through production.
Based in Conroe, TX, ProTek Models & 3D Printing specializes in custom scale models and rapid prototyping. They offer FDM and DLP/SLA 3D printing services, along with urethane casting. Their urethane casting process significantly relies on silicone molding to produce detailed, high-quality parts for various applications.
Based in Santa Fe Springs, CA, RD Rubber Technology Corp. specializes in custom rubber and silicone molding services. They offer injection, compression, and transfer molding capabilities, including cleanroom molding and silicone to plastic bonding. The company provides engineering and prototyping for complex parts, serving mission-critical applications in aerospace, defense, and medical device industries.
Based in Carson City, NV, REDCO specializes in custom silicone mold manufacturing and die-cutting services. They provide quality custom rubber products, including rubber-to-metal bonding and rubber rollers, serving various industries with high-quality molded parts since 1948.
RevPart specializes in rapid prototyping and manufacturing, offering custom silicone molding and plastic injection molding services. They also provide 3D printing, CNC machining, and urethane casting. Serving diverse sectors including medical, automotive, and aerospace, RevPart supports projects from initial prototype to high-volume production.
Based in Minneapolis, MN, Robinson Rubber Products Company, Inc. is an ISO 9001:2015 certified custom molding manufacturer. They specialize in elastomeric, thermoplastic, and Liquid Silicone Rubber (LSR) components. Capabilities include design assistance, custom rubber molding, insert & over molding, assembly, and packaging services.
Based in Port Richey, FL, Seaway Plastics is an ISO 13485 Certified injection molder specializing in thermoplastic and Liquid Silicone Rubber (LSR) molding. They provide in-house tooling, cleanroom molding, and assembly services for medical and other highly regulated industries. The company handles low-to-mid volume production.
Based in Miramar, FL, SIMTEC Silicone Parts specializes in high-quality liquid silicone rubber (LSR) and LSR multi-shot molded components. They provide turnkey solutions from concept to high-volume production for medical, healthcare, mobility, consumer, and industrial sectors, utilizing automated LSR injection molding and an ISO-certified class 8 clean room.
Specialty Manufacturing, Inc. (SMI) is a contract manufacturer of custom-engineered silicone products since 1979. They offer silicone injection molding, compression molding, die cutting, and component assembly for short-run to high-volume applications. SMI provides advanced silicone expertise for industries including medical and clean-room environments.
Based in Philadelphia, PA, Stockwell Elastomerics specializes in custom silicone gasket solutions for the technology equipment sector. The company's core business is silicone rubber, offering manufacturing capabilities for high-performance gaskets, seals, and cushioning pads. They also provide prototype silicone gaskets and pads with engineering support for demanding applications.
Based in Orange, CA, Tera Engineering Co. offers comprehensive product development and manufacturing services for businesses. Their expertise includes product design, prototyping, 3D printing, circuit board design, and injection molding. They help clients efficiently bring new products to market, leveraging experience to develop and manufacture solutions.
Based in Buffalo, NY, USA Industrials offers advanced custom molding capabilities for a wide spectrum of materials. They specialize in designing and molding products from plastic, rubber, and sponge/foam materials, serving various industrial applications.
Utah Medical Products, Inc. specializes in complex silicone and thermoplastic molding for medical and non-medical applications. Based in Midvale, UT, the company manufactures proprietary medical devices like advanced catheters for cervical ripening, suprapubic access, and enteral feeding, demonstrating robust product development and high-precision production capabilities.
Vector Molds specializes in producing professional, FDA-compliant food-grade silicone molds. The company provides stock and custom molds, manufactured from food-safe materials for the confectionery industry. Leveraging nine years of original designs, Vector Molds offers durable and easy-to-use silicone molds, ideal for gummies and candies.
Based in Buffalo, NY, Nissha Medical Technologies offers end-to-end design, development, and manufacturing of single-use medical technologies. They specialize in advanced capabilities, including Isometric Micro Molding Solutions, and work with materials like Liquid Silicone Rubber (LSR) for high-precision components, supported by accelerator programs.
Based in Worcester, MA, Jefferson Rubber Works, Inc. specializes in custom rubber molding, including liquid silicone injection molding. Since 1975, JRW has provided high-volume rubber injection molding with precision for OEMs. They offer advanced mold-making techniques and machining, delivering tailored solutions for diverse industrial needs.
Based in Lewisville, TX, Melon Rubber Products is a custom rubber molding company specializing in Liquid Silicone Rubber (LSR) molding, injection molding, compression molding, and transfer molding. With extensive expertise in rubber and silicone components, they serve diverse industrial clients across the United States.
Based in Ankeny, IA, Accu-Mold specializes in high-precision micro molding and tooling, backed by 40 years of experience. This vertically-integrated company utilizes advanced materials like Liquid Silicone Rubber (LSR) for optical micro molding, serving demanding sectors such as medical devices, micro electronics, and automotive.
Based in Grand Prairie, TX, Advanced Rubber Molding specializes in custom rubber molding services. They offer compression, transfer, and injection molding for various materials, including silicone. Serving diverse industries, the company provides precision manufacturing solutions for custom rubber and silicone components.
Based in Niles, IL, A.L.P. Lighting Components, Inc. specializes in optical silicone molding services, leveraging high-precision injection molding and advanced Moldable Optical Silicone (MOS). They provide comprehensive custom services including design, engineering, tooling, and manufacturing for diverse markets like lighting, aerospace, automotive, and medical.
ARCO Silicone, a division of Alliance Rubber Company, is a custom silicone manufacturer producing extruded and molded products in the USA. Leveraging over 100 years of experience, they provide custom silicone bands, cording, and tubing. They engineer products for specific physical designs, environmental resistance, and FDA compliance, serving diverse industrial applications.
Based in Northfield, NH, EPTAM provides progressive manufacturing solutions, specializing in silicone molding services. Capabilities include micro-molding, multi-material, and insert molding. The company offers technical expertise and custom designed automations, supporting clients from Design for Manufacturing through scaled production, prioritizing quality and cost.
EVCO Plastics specializes in Liquid Silicone Rubber (LSR) injection molding, offering custom manufacturing solutions for complex part geometries. They collaborate closely with clients to bring projects from concept to completion. The company operates multiple facilities, including locations in DeForest and Oshkosh, Wisconsin, and Calhoun, Georgia.
Based in Menands, NY, Extreme Molding specializes in custom silicone injection molding for high-performance consumer and life science products. This women-owned US manufacturer offers full-service production, including overmolding, assembly, packaging, and fulfillment for clients across North America and Europe.
Fathom is a U.S. contract manufacturer offering a comprehensive suite of services, including CNC machining and molding. They provide tailored manufacturing solutions for demanding industries such as Aerospace & Defense, Medical, Automotive & EV, and Semiconductor. With multiple U.S. locations, Fathom focuses on high-precision parts and complex geometries.
Based in Plymouth, MN, Minnesota Rubber & Plastics specializes in custom molding services for rubber, liquid silicone rubber (LSR), and plastic overmolding. They address complex sealing and component challenges for original equipment manufacturers. Utilizing advanced materials science and global manufacturing, the company develops highly engineered polymer components for industrial and medical applications.
Based in Brea, CA, M.R. Mold & Engineering specializes in the design and manufacture of liquid silicone rubber (LSR) and gum stock silicone injection molds. They also provide plastic injection molding, micro molding, overmolding silicone onto various materials, and insert molds, offering comprehensive services from design through manufacturing.
Rose Medical, based in Grand Rapids, MI, is an ISO 13485 Certified and FDA Registered medical device contract manufacturer. They provide expertise in rapid prototyping and full-scale production molding of silicone components, prioritizing precision, consistency, and reliability. Their comprehensive capabilities also include catheters and finished devices.
Based in Shakopee, MN, Rubber Industries, Inc. provides custom rubber and silicone molding services. With over 55 years of experience, they specialize in silicone injection molding, LSR, and custom tooling for prototype and production. Capabilities include medical and food grade applications, all proudly manufactured in the USA.
Based in Plano, TX, Service Rubber Group Inc. provides custom rubber products, including vibration isolation mounts, grommets, and extruded profiles. The company specializes in custom rubber molding and rubber-to-metal bonding, aiming to help manufacturers streamline processes and enhance product quality.
Spectrum Plastics specializes in insert molding and overmolding capabilities for both thermoplastic and silicone polymers. The company offers comprehensive solutions from initial ideas to final products, leveraging deep applications expertise and extensive experience within the medical device industry for client partnerships.
Based in San Diego, CA, ARRK North America, Inc. offers comprehensive product development services, spanning from rapid prototyping to full production. The company specializes in custom manufacturing, providing program management and design resources to help clients accelerate their products to market.
Beacon MedTech Solutions, based in Sterling, MA, specializes in liquid silicone rubber (LSR) injection molding. The company provides comprehensive expertise in part design and molding specifically for the medical device industry. Operating from ISO 13485 certified facilities, they offer integrated solutions for complex medical technology components.
Flexan, based in Elk Grove Village, IL, is a contract manufacturer specializing in custom elastomeric and thermoplastic components. They offer liquid silicone rubber (LSR) molding, precision rubber molding, and cleanroom manufacturing services for medical, defense, and industrial applications.
Based in Anaheim, CA, Konark Silicones manufactures premium silicone parts and offers LSR injection molding solutions. The company specializes in silicone injection and compression molding, along with comprehensive engineering, design, and prototyping services. They provide high-quality silicone parts for various industries.
Mina Products specializes in reliable compression molding for custom silicone and rubber parts. The company serves diverse sectors including medical, military, and industrial clients. They are committed to providing certified quality and precision manufacturing for specialized component needs across various demanding applications.
Plastic Molding Technology Inc. is a custom injection molder based in El Paso, TX, specializing in plastic and liquid silicone rubber (LSR) injection molding. The company offers capabilities such as two-shot, overmolding, and insert molding, serving diverse sectors including medical, electronics, and automotive industries.
Rapid Made specializes in providing rapid silicone molding services and tooling solutions for various industrial applications. The company offers quick turnaround times for master patterns, silicone rubber molds, and wax burnout patterns, enabling clients to receive essential tooling within days. They focus on efficient and high-quality mold production.
TECHLINK Silicones is a manufacturer of silicone molded parts, operating since 1999. The company provides silicone product manufacturing services from factories in the USA, Vietnam, and Europe. They specialize in custom silicone components for industrial and commercial applications.
Wise Plastics is a contract manufacturer based in Clifton Springs, NY, specializing in custom plastic injection molding and liquid silicone rubber (LSR) molding. They provide a range of manufacturing solutions, including multi-shot, overmolding, and insert molding, along with assembly and value-added services for diverse industries.
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How to Choose a Company
- Verify Process Expertise for Your Material: Confirm the supplier's proficiency in your chosen silicone type, whether it's Liquid Silicone Rubber (LSR) injection molding for tight tolerance, complex parts, or High Consistency Rubber (HCR) compression molding for more robust, simpler geometries. Inquire about their experience with specific durometer ranges and required tear strength for your application.
- Assess Compliance and Cleanroom Capabilities: For medical, pharmaceutical, or food contact applications, demand explicit proof of certifications like ISO 13485, USP Class VI biocompatibility, or FDA 21 CFR 177.2600 compliance. If cleanroom manufacturing is essential, verify their ISO Class 7 or 8 capabilities and audit their environmental controls.
- Scrutinize Flash Control and Post-Curing Processes: A common pitfall in silicone molding is excessive flash. Ask detailed questions about their mold design for effective venting, de-flashing methods (e.g., cryogenic deflashing, mechanical trimming), and how they ensure consistent post-curing to achieve final material properties and outgassing requirements. Request sample parts to evaluate parting line quality.
- Beware of Undervaluing Tooling Design: A red flag is a supplier quoting significantly lower tooling costs without a thorough Design for Manufacturability (DFM) review specifically for silicone. Poorly designed molds for silicone, particularly LSR, can lead to chronic flash issues, inconsistent part quality, and higher piece part costs due to increased de-flashing labor or scrapped parts. Ensure they can discuss mold gate design and runner systems in detail.
Frequently Asked Questions
What's the difference between LSR and HCR silicone, and which should I choose?
Liquid Silicone Rubber (LSR) is a two-part platinum-cured system pumped directly into a heated mold, ideal for complex, high-precision parts with thin walls and high volumes. It offers excellent flow, fast cycle times, and often requires less de-flashing. High Consistency Rubber (HCR) is typically a single-part compound that requires more force to mold (compression or transfer molding) and is better suited for larger, simpler geometries, or applications where tear strength and abrasion resistance are paramount. Your choice depends on part complexity, volume, required mechanical properties, and tolerance needs.
Why is post-curing important for silicone parts, and how does it affect cost?
Post-curing is a secondary thermal process where molded silicone parts are baked at elevated temperatures for a specified duration. It's crucial for achieving final mechanical properties, removing volatile byproducts (like those from peroxide cure systems in HCR), and ensuring compliance with biocompatibility or food contact standards by eliminating extractables. While adding to lead time and cost, skipping post-curing can result in parts that are sticky, have compromised physical properties, or fail regulatory requirements (e.g., USP Class VI, FDA 21 CFR 177.2600). Always confirm your supplier's post-curing capabilities and validation protocols.
How can I minimize flash and ensure clean parting lines on my silicone molded parts?
Minimizing flash, which is excess material squeezed out at the mold's parting line, is paramount in silicone molding. It starts with excellent mold design, featuring precise mold closure, adequate clamping force, and well-designed vent lines. Specifying a supplier with expertise in advanced tooling, like cold runner systems for LSR, can greatly reduce flash. Additionally, inquire about their de-flashing capabilities; techniques like cryogenic deflashing (tumbling parts in liquid nitrogen to embrittle flash for easy removal) or precision mechanical trimming are key. Always request DFM feedback on your part's geometry concerning parting line location and potential flash traps.