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Last updated: January 2026
This directory lists 51 potting compound manufacturers across the United States, from custom formulators specializing in novel resin chemistries to large-scale bulk material providers offering off-the-shelf solutions for high-volume applications.
Buyers engage potting compound manufacturers to solve a myriad of critical protection challenges, from safeguarding sensitive electronic components against moisture, vibration, and extreme temperatures to enhancing dielectric strength in high-voltage assemblies. The right compound provides crucial thermal management for heat-generating circuits, structural support against mechanical shock, and reliable insulation, preventing premature product failure in harsh operational environments.
The types of suppliers in this space vary significantly. Some focus on developing highly specialized, custom-formulated epoxies, urethanes, or silicones for niche applications like medical implants or aerospace components, often requiring extensive R&D collaboration. Others operate as distributors or large-scale manufacturers of standard, high-volume potting materials, offering competitive pricing and quick delivery for established designs, often with a focus on specific chemistries or performance characteristics like UL 94 V-0 flame retardancy.
To successfully engage these manufacturers, buyers must come prepared with detailed specifications. This includes not just the desired physical properties (e.g., Shore hardness, viscosity, operating temperature range), but also application method (manual pour, automated dispensing), environmental exposures (humidity, chemicals, thermal cycling), and any relevant regulatory compliance needs (e.g., RoHS, REACH). A clear understanding of your production volume, desired lead times, and willingness to share technical drawings or component samples will significantly streamline the evaluation process.
51 companies nationwide
Based in Easton, PA, AeroMarine Products, Inc. manufactures encapsulating and electrical potting compounds. They offer a range of materials, including silicone and epoxy, for protecting circuitry and proprietary components. The company provides technical support, videos, and blogs to assist customers with project needs.
Appli-Tec, Inc. develops and manufactures high-performance, thermally conductive electronics potting compounds. Based in Salem, NH, the company provides precision mixed adhesives for potting, staking, and encapsulating applications. They serve engineers requiring consistent, repeatable results for various electronics challenges.
CDx Industrial, based in Chicago, IL, custom formulates and manufactures industrial potting and encapsulation systems. They specialize in epoxy and polyurethane compounds, offering tailored solutions for electrical potting, thermal management, and UL flame retardant applications, along with industrial adhesives and specialty coatings.
Based in Mendocino County, CA, Cold Creek Compost manufactures high-quality compost products and custom soil blends. Established in 1995, they produce Agrow-Blend chicken manure compost and Growers Choice Planter Mix. These products are formulated for North Coast soils, serving commercial growers, nurseries, and landscapers.
Based in Hutchinson, MN, Creekside Soils manufactures a range of professional-grade planting mixes, soils, and mulches. They specialize in compost and peat-based blends for various gardening projects, offering custom blending and bagging services for different applications.
Based in Denver, CO, EFI Polymers manufactures high-performance epoxy and urethane formulations. They provide robust potting compounds for electronics and motor manufacturing, and casting resins for power grid infrastructure. The company offers custom solutions and high-quality manufacturing to address specialized industry requirements.
Based in Palmyra, WI, Epic Resins manufactures custom epoxy and polyurethane compounds. The company provides formulations that enhance reliability, performance, and long-term protection for diverse applications. They specialize in electronic potting, E-mobility, and LED encapsulants, serving industries like batteries and composites.
Epoxies, Etc. formulates epoxies, urethanes, and silicones. The company manufactures adhesives, potting and encapsulating compounds, and coatings. These advanced polymer solutions serve the electronic, electrical, construction, and decorative industries.
Based in Cairo, GA, Graco Fertilizer Company specializes in producing specialty fertilizers and potting soil. They offer a variety of soilless potting media, including custom-blended and bulk options, for agricultural and gardening customers. Graco supports growers across the Southern United States.
Based in Mira Loma, CA, GS Polymers, Inc. manufactures specialty polyurethane and epoxy products. They offer standard product lines and custom formulating services for adhesive, potting, and casting applications. The company provides custom potting compound development, casting compounds, and application testing for diverse industrial needs.
Based in Hanover, MA, Hapco, Inc. manufactures high-performance polyurethane, epoxy, and silicone resins. Their Di-Pak™ product line offers compounds specifically engineered for potting, encapsulating, and component manufacturing. Serving industrial clients since the 1980s, Hapco provides materials designed for durable protection.
Hernon Manufacturing, based in Sanford, FL, specializes in providing high-performance adhesive, sealant, and gasketing solutions. They offer alternatives for various industrial applications, focusing on maintaining performance, reliability, and cost-efficiency for their clients, likely including potting compounds.
Based in North Bergen, NJ, Key Polymer manufactures UL Listed, UL94 V-0 rated urethane potting compounds. They offer TOUGH-SEAL™ PC and Klear-Seal product lines for sealing electrical and electronic components, including clear compounds for LED lighting and custom solutions.
Based in Elk Grove Village, IL, Meridian Adhesives Group develops and manufactures innovative adhesive technologies. They specialize in creating dynamic adhesive solutions, including UV curable potting epoxy resins, ideal for potting and adhesive applications in electronics, industrial assembly, and medical markets.
Based in Danbury, CT, Miller-Stephenson Chemicals has provided innovative chemical solutions since 1955. They offer a range of products, including EpoxSys™ 400 for epoxy potting applications, Krytox™ greases, PTFE dry lubricants, and polyurethane conformal coatings for various industrial needs.
Based in Glendale, WI, Milwaukee Electronics provides electronics manufacturing services with expertise in applying various potting compounds, including urethane, epoxy, and silicone. The company offers PCB assembly and box build solutions, helping clients manage supply chain challenges and outsourcing needs.
Based in Linden, CA, My Bark Co. Inc. is a supplier and creator of bulk organic soils, soil amendments, and custom blends. They produce green and organic landscaping supplies, including engineered wood fiber, bark, wood chips, and materials for agriculture and public works.
Based in Buffalo Grove, IL, Profile Growing Solutions manufactures growing media substrates like HydraFiber and Florikan controlled-release fertilizers. They provide engineered media solutions for various horticultural applications, enhancing plant growth and operational efficiency for commercial growers.
Based in Quakertown, PA, PTHorticulture manufactures professional growing media. They formulate specialized solutions for commercial growers, catering to diverse horticultural needs including germination trays, hanging baskets, nurseries, and controlled environment agriculture. Their products support optimal plant growth across the industry.
Race Spec manufactures Race Gel, a specialized two-part potting compound for electronics. This compound is designed to help electronics enclosures achieve robust IP68 ratings for protection. Customers combine the compounds, stir, and pour to apply the solution.
Based in Sacramento, CA, Redi-Gro is a manufacturer and distributor of lawn and garden products. The company specializes in soils, soil amendments, and bark, offering tailored solutions for nurseries, landscape professionals, growers, and retail stores. They operate a fleet of trucks to ensure timely delivery of orders.
ResinLab LLC manufactures custom adhesives and encapsulants, which include potting compounds, for various industrial applications. The company provides custom formulations, packaging, and product modifications, alongside comprehensive lab services and toll blending solutions.
Based in Okahumpka, FL, Southeast Soils is a horticultural supply company specializing in premium custom potting media and soil amendments. They develop professional-grade mixes tailored for Florida's horticulture industry growers, ensuring optimum media. The company is committed to excellent customer service and cost savings.
S-Polymers develops and manufactures flexible, polymer-based potting materials designed to protect electronics. These advanced compounds shield components from thermal shock and damage caused by internal shrinkage due to temperature fluctuations. The company provides specialized solutions for various industrial applications requiring robust electronic encapsulation and protection.
Based in Gardena, CA, Stabond Corporation manufactures high-performance potting compounds, adhesives, coatings, and sealants. Their products are made in the USA to ISO 9001/AS9100 and NADCAP standards, serving aerospace, defense, construction, and general manufacturing industries.
Star Technology manufactures high-quality resins, including epoxies, urethanes, and UV-cure acrylates, for adhesive, potting, and encapsulation compounds. They serve global manufacturers in electronics, electrical assemblies, medical devices, and automotive components. The company also offers custom formulations and provides technical support from formulation to final application.
Based in Agawam, MA, Sun Gro Horticulture produces and distributes horticultural growing media. The company specializes in horticultural-grade peat, peat moss, and diverse peat and bark-based growing compounds. They provide essential components for potting and planting applications, primarily serving commercial growers.
Based in San Jose, CA, T-Global USA specializes in innovative thermal management solutions. The company manufactures silicone potting compounds, curable thermal gels, and various thermal interface materials. Their potting compounds offer outstanding thermal conductivity, high-temperature resistance, and robust environmental protection for advanced electronic applications.
Timtronics manufactures thermally conductive, two-part potting compounds designed to cure at room temperature into a soft, pliable rubber. These low viscosity compounds are engineered to cure effectively even in deep sections. The company offers a range of thermal epoxies and potting compounds.
Based in Royal Oak, MI, United Resin manufactures established and custom-formulated epoxy resin systems. They specialize in battery potting and encapsulation for electric vehicle (EV) components, also providing solutions for electronic assembly, adhesives, and sealants. United Resin serves diverse sectors including electrical, automotive, and aerospace industries.
Vibra-Tite, based in Troy, MI, manufactures a range of high-performance industrial adhesives, including low-viscosity potting compounds like Vibra-Tite 935. The company specializes in custom formulations and provides solutions for diverse applications such as aerospace, automotive, marine, and medical equipment industries.
Westlake Epoxy manufactures innovative epoxy resin systems and compounds. With over 75 years of experience, the company provides specialized chemical solutions, including thermal shock resistant epoxy compounds for potting preheated assemblies. These products serve diverse industrial applications.
STI Vibration Monitoring Inc. manufactures potting compounds, offering the CMCP600E adhesive. This compound is designed for filling back shells on CMCP600 series connector kits, providing robust protection for electronic connections. Each cartridge fills approximately 50 connectors, serving industrial applications in vibration monitoring.
Based in Escondido, CA, The Epoxy Experts specializes in formulating and manufacturing high-performance epoxy systems. They offer a range of products, including casting resins like MAX MCR BLACK A/B, ideal for industrial applications such as potting, encapsulation, and adhesion for commercial clients.
Sika Automotive specializes in advanced resin solutions, including materials ideal for potting, encapsulation, and casting applications for the automotive sector. They serve OEMs and suppliers with a comprehensive suite of bonding, sealing, damping, and reinforcing products, contributing to vehicle safety, strength, and sustainability.
Creative Materials Inc., based in Ayer, MA, specializes in manufacturing high-performance functional materials including potting compounds, encapsulants, conductive adhesives, and inks. Their advanced products are crucial for military, automotive, microelectronic, aerospace, and industrial applications, providing robust solutions for power supplies and various critical components.
Electronic Coating Technologies (ECT) manufactures advanced potting compounds for PCBs and electronic components. These compounds are engineered to provide superior protection against physical stress, thermal shock, chemical exposure, and heat, ensuring durability and performance for various electronic applications.
Master Bond formulates and manufactures custom epoxies, silicones, polyurethanes, and UV curable systems. Products are made-to-order from their USA facility for industrial applications, ensuring optimal shelf life. They provide extensive technical support, custom formulation development, and meet various certifications.
MORR, Inc. is a vertically integrated manufacturer, distributor, and service provider catering to commercial crop producers. The company specializes in producing various growing media, including rockwool, coir, and potting soil. Dedicated to supporting US farmers, MORR, Inc. provides essential agricultural products and services.
PPG Industries manufactures specialized potting compounds designed to provide reliable and durable sealing solutions for various industrial and commercial applications. As a global chemical and coatings company, PPG offers these high-performance materials as part of its diverse portfolio of specialty products.
Raytech Gels manufactures silicone potting compounds for electronics, providing electrical insulation solutions. They specialize in reenterable and reusable dielectric gels, including IP68-protected products for electrical box insulation. The company also offers a range of cabling and electrical accessories.
Based in Cranston, RI, RBC Industries, Inc. manufactures standard and custom epoxy, silicone, UV curable, and waterbased polymer systems. Their UL listed compounds offer 94VO flame resistance, superior thermal shock, excellent moisture resistance, and high heat distortion, making them ideal for various industrial potting applications.
Based in Otsego, MI, Renewed Earth specializes in custom potting soil blending. The company manufactures and supplies various potting compounds for nurseries, commercial growers, and landscapers across Michigan. They have served the industry for 25 years.
Based in Cuyahoga Falls, OH, Silicone Solutions manufactures high-performance silicone adhesives, sealants, gels, and coatings. They provide products for applications such as shock dampening, vibration isolation, and conformal coating for PCBs and electronics. The company also offers custom formulation services tailored to specific client needs.
ThreeBond International, based in Cincinnati, OH, manufactures industrial adhesives, sealants, and coatings. Specializing in connector potting compounds and heat dissipating agents, the company primarily serves the automotive and medical device industries. With North American manufacturing and headquarters in Cincinnati, ThreeBond focuses on innovative solutions.
Uraseal manufactures URB kits, specialized potting compounds designed for challenging applications. These products offer low viscosity for easy flow and quick penetration into irregular shapes and deep potting requirements. Uraseal focuses on providing quality, value-added solutions for special connection protection needs to its customers.
3M manufactures and supplies a range of industrial products, including specialized potting compounds. Their offerings include rigid, two-part epoxy potting compounds like the Scotch-Weld™ DP270, designed for various industrial applications requiring strong adhesion and insulation.
CHT Silicones manufactures 2-part RTV silicone potting compounds and encapsulants, providing deep section cure for electronic component encapsulation. These silicones are utilized in automotive under-bonnet applications, thermal management, and LED lighting for heat transfer and optical clarity.
Henkel Adhesives is a global manufacturer of advanced adhesive technologies, including high-performance potting compounds. These compounds are designed for effective potting of electronics, offering protection against environmental influences, improved mechanical strength, and high electrical insulation properties for various industrial applications.
Based in Maple Plain, MN, MacDermid Alpha manufactures Electrolube potting compounds and encapsulation resins. These products are engineered to shield electronic components from chemicals, moisture, and shock, ensuring long-lasting performance in various applications.
T-Global Technology, Inc., based in Gardena, CA, manufactures advanced thermal management solutions, specializing in flexible, two-part epoxy-based potting compounds. These compounds are engineered for diverse applications like automotive, LED, and industrial control, providing robust protection and optimal thermal performance for electronic components.
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Pot life, also known as working life, is the amount of time a mixed two-part potting compound remains liquid enough to be applied effectively before its viscosity increases significantly. Cure time, conversely, is the total time required for the compound to fully harden and achieve its ultimate physical and chemical properties, like Shore hardness and dielectric strength, which often continues long after it's tack-free. Understanding both is crucial for production scheduling and ensuring final product integrity.
The UL 94 V-0 rating is extremely critical for applications where fire safety is a concern, such as consumer electronics, automotive components, or any device operating in confined spaces. It indicates that the material will self-extinguish within 10 seconds and will not drip flaming particles. For high-voltage, power, or battery-related applications, specifying a UL 94 V-0 compound is often a non-negotiable regulatory requirement and a key factor in product liability and user safety.
You can absolutely source custom-formulated compounds, and for unique applications, it's often the best approach. Off-the-shelf options are cost-effective for standard needs, but if your product has very specific environmental stressors, thermal management requirements, or unusual component materials, a custom formulation can optimize performance, reduce risk, and even simplify your manufacturing process. Be prepared for higher NRE costs and longer lead times with custom development, but also expect a compound perfectly tailored to your needs.
Beyond headline specs like Shore hardness or temperature range, scrutinize details like Tg (Glass Transition Temperature), coefficient of thermal expansion (CTE), moisture absorption rates, and specific gravity. Understand the recommended mixing ratio (parts by weight or volume), processing parameters (degassing, cure schedule), and storage conditions. A comprehensive datasheet will also include test methods (e.g., ASTM standards) for each property, providing confidence in the data's reliability.
Provide them with a detailed application brief. This should include worst-case operating temperatures, thermal cycling profiles, potential chemical exposures (solvents, fuels), vibration profiles, and humidity levels. Crucially, share the materials of your components and enclosure to allow the supplier to assess adhesion, potential thermal expansion mismatches, and chemical compatibility, which directly impacts the long-term dielectric strength and overall reliability of the potted assembly.