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Last updated: January 2026
This directory lists 50 potting encapsulation companies across the United States, from highly specialized custom formulators crafting bespoke polyurethane or epoxy compounds to large-scale contract manufacturers offering automated vacuum potting and curing services for high-volume applications.
Buyers engage these specialized companies to solve a range of critical engineering problems, primarily for environmental protection, electrical insulation, and mechanical stabilization. Whether shielding sensitive electronics from moisture and chemicals, providing robust dielectric strength for high-voltage components, or dampening vibrations to extend product lifespan, the right encapsulation partner is key. They help prevent issues like arc tracking, short circuits, and physical damage that can compromise performance and safety.
Supplier types in this sector vary significantly. Some focus on material formulation and supply, offering custom resins, gels, and foams with specific thixotropic properties or Shore hardness ratings. Others specialize in contract manufacturing services, providing the expertise and equipment for dispensing, curing, and testing your components. You'll find companies adept at small-batch custom work, often employing manual vacuum potting, alongside those with fully automated lines for large-scale production, capable of handling intricate geometries and tight tolerance voiding requirements.
To effectively engage these suppliers, buyers must come prepared with detailed specifications. This includes precise information on the operating environment (temperature range, chemical exposure), required electrical properties (dielectric strength, volume resistivity), mechanical considerations (vibration, impact), and any specific compliance standards like UL 94 V-0 or IPC-CC-830B. Suppliers will expect clear drawings, desired pot life, cure schedules, and acceptance criteria for final product integrity.
50 companies nationwide
Based in Elgin, IL, A2Z Electronics LLC is an electronics contract manufacturing company. They provide PCBA, surface mount, and through-hole technology services, along with cable and wire assembly, box build, and coating and potting. The company serves diverse sectors including medical, aerospace, and industrial applications.
Based in Salem, NH, Appli-Tec, Inc. specializes in potting and encapsulation services for electronics, PCBs, coils, magnets, and sensors. The company utilizes thermally conductive, electrically insulating materials and also develops and manufactures precision mixed adhesives, ensuring consistent and repeatable results for various applications.
Based in Salt Lake City, UT, Biomerics is a full-service contract manufacturer specializing in liquid resin casting for interventional medical devices. With over 25 years of experience, they provide design through manufacturing solutions, including engineered components and polymer and metal expertise.
Based in Salt Lake City, UT, Biovation Labs LLC is a contract manufacturer specializing in supplement formulation. They provide comprehensive services including validated supply chain quality, encapsulation, and packaging. The company leverages decades of experience in contract manufacturing for the dietary supplement industry.
Based in Carson, CA, ACME PCB Assembly is an ISO 9001:2015 certified electronic contract manufacturing provider with over 30 years of experience. They specialize in PCB assembly, offering services like SMT, BGA, and Thru-Hole. The company directly provides potting and encapsulating services for electronic components, in addition to box builds and conformal coating.
C & M Rubber Co., based in Dayton, OH, specializes in custom rubber fabrication and molding. They encapsulate metal inserts and electronic sensors in silicone or other thermosetting elastomers. Serving military, medical, aerospace, and high technology industries, they provide engineering support and are ISO 9001:2015 certified.
Based in Denver, CO, EFI Polymers provides high-performance epoxy and urethane formulations. They specialize in custom potting solutions and casting resins for electronics, motor manufacturing, and power grid infrastructure. With over 30 years of experience, EFI addresses thermal shock, voids, and cracking issues in industrial applications.
Based in Los Angeles, CA, Electronic Polymer Technologies provides NASA-grade conformal coating services for electronic circuit boards. They specialize in component encapsulation, potting circuit boards, and staking and bonding for critical devices. With over 20 years of experience, the company protects electronic components from harsh environments.
Based in Kaufman, TX, ELIS Manufacturing & Packaging Solutions specializes in contract manufacturing for nutraceuticals and consumables. They provide comprehensive services including custom formulation, blending, and encapsulation. ELIS offers end-to-end solutions, handling precise filling, custom packaging, printing, kitting, warehousing, and efficient product shipping.
Based in Palatine, IL, Encap Technologies specializes in expert thermoplastic encapsulation and overmolding services. With over 25 years of experience, they provide comprehensive solutions for electro-mechanical devices, including motors, transformers, and solenoids, ensuring high yield rates.
Endicott Coil Co., Inc. offers custom coil winding and encapsulation services. They produce encapsulated coils that shield components from harsh elements, providing high dielectric and isolation properties, plus improved heat transfer. Serving industrial, medical, and aerospace/defense sectors, the company supports both prototype and high-volume production needs.
Based in Cranston, RI, Epoxies, Etc. formulates advanced polymer solutions including epoxies, urethanes, and silicones. They provide adhesives, potting and encapsulating compounds, and coatings. These products protect and insulate circuitry and components, serving the electronic, electrical, construction, and decorative industries.
Based in Corona, CA, Elastomer Technologies, Inc. specializes in customer-tailored molding and die cutting of engineered parts. They offer comprehensive elastomer manufacturing services, including compression, transfer, and liquid injection molding, for complex part fabrication. These capabilities are well-suited for various potting and encapsulation requirements, serving diverse industrial clients.
Based in Mira Loma, CA, GS Polymers, Inc. manufactures specialty polyurethane and epoxy products. They offer standard and custom formulations for adhesive, potting, and casting applications, including custom potting formulating services for encapsulating electrical components.
Based in Hanover, MA, Hapco, Inc. specializes in custom formulated urethane and epoxy systems. They provide comprehensive solutions for projects requiring advanced potting, encapsulation, casting, or molding. The company offers expertise in selecting optimal materials for specific performance needs, serving diverse industrial applications.
HDA Technology, Inc. provides integrated RF and Microwave module and sub-assembly services for defense, aerospace, and commercial industries. Among its assembly capabilities, the company offers potting and encapsulation, microelectronic assembly, wire bonding, die attach, and conformal coating. Based in Lake Forest, California, HDA Technology is ITAR compliant and ISO9001/AS9100 certified.
Based in Fountain Valley, CA, Interconnect Solutions Company provides comprehensive Electronics Manufacturing Services (EMS). They specialize in custom cable assembly, wire harness manufacturing, box builds, and PCBA assembly. Their offerings include prototyping, full production, overmolding, and direct potting and encapsulation for electronic components.
Based in Mentor, OH, IT Plastics is a service-oriented company providing potting and encapsulation services. They specialize in serving manufacturers, electronic designers, and engineers with critical component protection needs, ensuring robust and reliable solutions for various applications.
Key Polymer manufactures high-performance specialty adhesives and coatings, providing custom potting compounds. Their TOUGH-SEAL™ line offers durable potting for electrical and electronic components, ensuring complete coverage. They also produce Key Klear-Seal, a non-fogging clear potting compound specifically for polycarbonate LED lighting, meeting diverse encapsulation needs.
Based in Glendale, WI, Milwaukee Electronics is an electronics manufacturing services provider. The company specializes in potting and encapsulation, utilizing various compounds including urethane, epoxy, and silicone. They offer solutions for complex challenges in electronics assembly and manufacturing.
Based in Dayton, OH, Mirac Tabtronics provides PCB encapsulation (potting) services. The company specializes in protecting electronic components from harsh environments and abrasion, ensuring durability for electronics that must withstand extreme conditions.
Plasma Ruggedized Solutions (PRS) specializes in high-quality potting and encapsulation services, parylene coating, and proprietary plasma technologies. With over 20 years of experience, PRS offers full-service manufacturing for aerospace, defense, medical, and industrial sectors. They hold NADCAP, AS9100, and NASA certifications.
Polyelectronics specializes in providing watertight encapsulation services, expertly minimizing bubbles and gaps in components. Their meticulous process includes a controlled curing period of 24 hours or more in specialized environments, ensuring robust and reliable encapsulated products for various applications.
Based in Mechanicville, NY, Polyset manufactures electrical potting and encapsulation compounds. These specialized materials protect electronic components from harsh environmental conditions, chemical aggression, vibration, and temperature extremes. The company also offers polyurethane adhesives, expansion joint systems, and protective coatings.
Based in Houston, TX, Primary Sourcing manufactures custom circuit board and electro/mechanical assemblies. They provide essential potting, encapsulation, staking, and conformal coating for high-reliability products. Serving technology-driven companies, Primary Sourcing offers comprehensive design, prototyping, and manufacturing.
Based in Conroe, TX, ProTek Models specializes in custom scale model production, complemented by advanced 3D printing services including FDM, DLP/SLA, and automotive applications. The company provides urethane casting and RTV molding, enabling the creation of intricate parts, prototypes, and encapsulated components. They serve clients requiring detailed models and cast industrial components.
Based in North Salt Lake, UT, Salt Lake Cable & Harness is a custom manufacturer specializing in cable assemblies, wire harnesses, and electromechanical box builds. They offer prototyping services and provide potting capabilities, utilizing high-grade epoxies and silicones to protect electronic assemblies against heat and shock.
Based in Hamilton, NJ, Salvona specializes in advanced encapsulation technologies. The company enhances product performance and stability while controlling the release of active ingredients. Salvona offers custom encapsulation solutions, utilizing proprietary technologies like HydroSal®, SalSphere®, and MultiSal® to meet diverse client needs.
Based in West Palm Beach, FL, Solitron Devices, Inc. specializes in providing PCB potting and coating compounds. The company offers various PCB encapsulations, helping customers select appropriate materials tailored to their specific application needs for electronic component protection.
Based in Billerica, MA, SpecCoat offers potting and encapsulating solutions. The company specializes in protecting printed circuit boards (PCBs) for various applications, providing crucial safeguarding for electronic components.
Based in Anaheim, CA, Technotronix provides comprehensive electronics manufacturing services, specializing in PCB assembly, prototyping, and box-build solutions. They offer value-added services including direct potting and encapsulation, conformal coating, and electro-mechanical assembly. Technotronix serves various industries, including electronics, automotive, and medical.
Based in San Jose, CA, T-Global USA specializes in thermal engineering solutions. The company provides innovative thermal management products, including silicone potting compounds, thermal pads, greases, and phase change materials. They serve industries like energy, e-mobility, and communication with efficient heat dissipation solutions.
Based in Los Alamitos, CA, Thermo Power Industries is a US manufacturer specializing in potting and encapsulation solutions for electronics. They also offer plastic injection molding, overmolding, insert molding, and assembly services. The company serves industrial, aerospace, medical, and automotive markets.
Based in Austin, TX, TRI-International conducts applied research and development for government and industrial clients. They offer specialized solutions, including the PU-189 Polyurethane Potting Compound designed for potting, encapsulation, and molding applications. TRI-International innovates using advanced tools and technologies to solve complex problems.
Vinatronic, an electronics contract manufacturer based in Huntington Beach, CA, specializes in comprehensive PCB assembly services. They offer SMT, Thru-Hole, and mixed technology. Key capabilities include direct potting and conformal coating for electronic assemblies, alongside PCB manufacturing, component sourcing, box build, and cable assembly.
Brightworks USA provides comprehensive contract manufacturing services for industrial applications. The company specializes in automated step and repeat potting, alongside offerings like high capacity burn-in chambers and precision laser marking. As Brightworks Technology, Inc., a US subsidiary, it supports clients with advanced manufacturing processes for various product needs.
Polymer-G specializes in providing comprehensive potting and encapsulation solutions to protect sensitive electronic components. Based in San Jose, CA, the company offers advanced adhesive, sealant, and encapsulant materials along with application expertise and process optimization for diverse industries, including automotive, aerospace, and electronics.
Based in Alpharetta, GA, Weller PCB specializes in providing PCB potting and encapsulation services. The company offers complete environmental sealing and mechanical protection for electronics facing extreme stress. With over 20 years of experience, Weller PCB focuses on high mix, low volume manufacturing for OEMs.
BBM Inc. provides conformal coating services from its facility in McKinney, TX. The company emphasizes quality in applying protective layers to electronic components, operating as a direct service provider in the United States. Its offerings align with the broader field of electronic protection.
Based in Mequon, WI, Copps Industries manufactures over 2,500 custom epoxy and urethane chemical solutions. They offer adhesives, coatings, and potting compounds for complex industrial challenges. Products serve diverse sectors, including rock crusher backing and specialized epoxies for precast concrete applications.
Based in Mankato, MN, EIMicro provides comprehensive electronic manufacturing services, including expert potting and encapsulation solutions for PCBs. They offer advanced PCB assembly, conformal coating, and box build. EIMicro serves diverse industries like medical, industrial, commercial, defense, and aerospace, ensuring durability and reliability for critical electronic components.
Electronic Coating Technologies (ECT) provides specialized potting services for electronic components. These services offer robust protection against physical stress, thermal shock, chemical exposure, heat, and humidity. ECT's potting solutions also deliver essential electrical insulation, enhancing the reliability and lifespan of sensitive electronics in various applications.
Based in Fontana, CA, TPC Inc. specializes in custom urethane solutions and high-quality polyurethane materials. With over 40 years of experience, they offer custom molding, precision machining, and rapid prototyping services for urethane products. They serve industries like oil/gas, aerospace, and military.
McGregor-Surmount provides integrated manufacturing solutions, specializing in critical processes like potting/encapsulation and hot bar soldering. The company supports product development from initial concept through to final reality, leveraging its robust integration capabilities to deliver comprehensive manufacturing services.
Based in San Marcos, CA, Procoat specializes in conformal coating, epoxy, and potting services for electronic components. With 50 years of combined experience, the company ensures optimal performance in adverse conditions for military, medical, aerospace, and marine environments.
Based in Bristol, CT, Quality Coils, Inc. manufactures custom coils, including molded, encapsulated, self-supported, and tape-wrapped designs. The company offers encapsulation services for connectors and diode packs, serving demanding sectors like military and aerospace with its specialized capabilities.
Based in Amherst, NH, Resin Systems Corporation specializes in custom liquid resin castings, offering overmolding and encapsulation services. They formulate epoxies, urethanes, and silicone rubber for prototyping through production. The company handles low to medium volumes, also producing cast microwave absorbing materials and high voltage insulators.
Silicone Solutions, based in Cuyahoga Falls, OH, manufactures custom and stock silicone products for potting and encapsulation. They provide high-performance silicone adhesives, sealants, gels, and coatings designed to protect sensitive electronic components from environmental extremes. The company also offers custom formulation services and consulting for industrial applications.
Based in Cincinnati, OH, ThreeBond International is a global technology champion providing industrial adhesives, sealants, and coatings. They supply connector potting compounds and heat dissipating agents for automotive and medical device applications, offering innovative solutions and manufacturing capabilities.
Prinova provides precision powder encapsulation technology for raw bioactive ingredients. Their custom solutions enhance stability, mask flavors, and control release. With direct US manufacturing capabilities, including an encapsulation facility in Indianapolis, IN, Prinova serves diverse industrial clients.
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Acceptable voiding varies significantly with the application. For general protection, small voids might be tolerated. However, for high-voltage or mission-critical electronics, even minute voids can lead to dielectric breakdown or hot spots. Suppliers typically measure voiding using X-ray inspection or CT scanning, providing images and sometimes volumetric data. It's crucial to define your acceptable voiding percentage and size limits with the supplier upfront, potentially even specifying void location constraints.
The coefficient of thermal expansion (CTE) of the encapsulant is paramount. A significant mismatch between the CTE of the potting compound and the encapsulated components (e.g., PCB, ICs) can induce mechanical stress during thermal cycling, leading to cracked solder joints, component failure, or delamination. Silicones generally offer more flexibility and lower stress, while epoxies provide greater rigidity but demand careful CTE matching for extreme temperature swings. Discuss your operating temperature range extensively with the supplier.
Standard potting compounds primarily offer dielectric insulation and environmental protection, not EMI/RFI shielding. While they encapsulate and physically protect, they don't inherently block electromagnetic interference. For EMI/RFI shielding, you would typically need a separate solution, such as conductive coatings, shielded enclosures, or specialized potting compounds that incorporate conductive fillers. Discuss your specific shielding needs with the supplier; they might offer services for integrating these solutions.
A short pot life means the mixed encapsulant material has a very limited time before it starts to cure and thicken, making it unworkable. In high-volume settings, a short pot life necessitates highly automated, fast-dispensing equipment and precise timing to prevent material waste and ensure consistent fill. It also demands efficient cleaning cycles for dispensing nozzles. If your production volume is high, ensure the supplier's equipment and process control can effectively manage short pot life materials without compromising quality or yield.
Ask for their procedures on lot control and traceability for all potting compounds used. This includes batch numbers, manufacturing dates, and expiration dates of the raw encapsulant materials. Inquire how they link specific material lots to your production batches and finished goods. For regulated industries (e.g., medical, aerospace), demand full certificate of conformance (CoC) for each material lot used in your assemblies. This ensures accountability and helps in root cause analysis if a material-related issue arises.