United Resin has a number of well-established epoxy systems for potting and encapsulating batteries, battery components, and electronic part casting. Epoxy resin will keep your batteries secure from damage caused by shock, moisture, vibration, chemicals, and many other elements. United Resin has the material and expertise when selecting epoxy material for your battery applications. We have materials ready for most applications and can develop custom systems to meet all your requirements. Contact one of our epoxy experts to discuss your requirements. United Resin will work with you to tailor a product to fit your needs. Our goal is to find the right material for your applications.
Our formulated epoxy systems excel in applications where an industrial adhesive or potting, encapsulating, and casting material is required, including for large or small batteries and battery packs. Industries range from lithium battery packs, EV batteries, power tool batteries, garden equipment tool batteries, marine components, military/defense applications, GPS tracking components, process control parts, and more. United Resin has been supplying the automotive industry for over 50 years. We have developed lightweight epoxies for the Electric Vehicle (EV) and Electric Vehicle (EV) battery markets. United Resin has several established systems to meet the needs in EV manufacturing. All our materials are non-hazardous, REACH/RoHS compliant, and contain no solvents.
United Resin has UL Approved (HB and V-O), lightweight, high thermal, thermally conductive, and heat resistant materials with low exotherm properties. Epoxy is resistant to chemicals, acids, fuels, solvents, moisture, and salts, making it an excellent choice for your potting, encapsulation, and EV component needs. This allows designers several choices when selecting an epoxy material from United Resin. We offer a wide range of hardness and viscosities of epoxies to meet your needs.
Battery Potting & Encapsulating Epoxy Resin Systems for EV Batteries & EV Components
EL-CAST with 641 Hardener
El-Cast with 641 Hardener is a medium viscosity potting and encapsulation resin. It has excellent bonding properties to metals, plastics, and ceramics. With good air release, the cured part will have a gloss finish. Maximum use temperature of this system is 250 F.
Key properties
| UL 94 Flame Class | HB |
|---|---|
| Color: | Black or White |
| Shore "D" Hardness ASTM D2240: | 85 |
| Volume Resistivity, Applied voltage: 500 VDC @ 1 min. Ele. per ASTM D257 | 1.3 x 1015 |
| Dielectric Constant, Test frequency: 1 MHz per ASTM D150 | 4.39 |
| Dielectric Strength, Oil rate of rise (short time): 500 V/S per ASTM D149 | 409 |
| Dissipation Factor, Test frequency: 1 MHZ per ASTM D150 | .0213 |
| Thermal Conductivity, BTU-in./hr, -ft2-oF per ASTM C177 | 6.50 |
Other Applications
Batteries for lawn and garden equipment, pulse transformers, magnetic components, noise interference filters, marine sonar devices, and many other potting, casting or encapsulating applications.
EL-CAST VFR PLUS with 117 Hardener
El-Cast VFR PLUS with 117 Hardener is a 100% epoxy system. This system is a softer, flexible, epoxy system. This system’s low viscosity and excellent air release allows it to cure to a high gloss finish. This system is UL 94 V-O approved. This system has 0 second AfterFlame, no flame drip and is easy to mix.
Key properties
| UL 94 Flame Class | V-O |
|---|---|
| Color | Black |
| Shore "A" Hardness ASTM D2240: | 75 |
| Viscosity | Mixed: 7,000 cps |
| Volume Resistivity, Applied voltage: 500 VDC @ 1 min. Ele. per ASTM D257 | 2.7 x 1015 |
| Dielectric Constant, Test frequency: 1 MHz per ASTM D150 | 4.22 |
| Dielectric Strength, Oil rate of rise (short time): 500 V/S per ASTM D149 | 496 |
| Dissipation Factor, Test frequency: 1 MHZ per ASTM D150 | 0.0187 |
| Thermal Conductivity, BTU-in./hr, -ft2-oF per ASTM C177 | 6.25 |
Other Applications
Delay lines, pulse transformers, alarm systems, filters, and magnetic components.
EL-CAST VFR PLUS with 118 Hardener
El-Cast VFR PLUS with 118 Hardener is a filled two-component epoxy, that is UL approved for 94 V-O. The VFR system has excellent air release and cures to a high gloss finish. It is heat resistant to 400°F. This system has excellent fire retardancy, no flame drip and is easy to mix.
Key Properties
| UL 94 Flame Class | V-O |
|---|---|
| Color | Black |
| Shore "A" Hardness ASTM D2240: | 85 |
| Viscosity: | Mixed 6000 cps |
| Volume Resistivity, Applied voltage: 500 VDC @ 1 min. Ele. per ASTM D257 | 4.4 x 1015 |
| Dielectric Constant, Test frequency: 1 MHz per ASTM D150 | 4.28 |
| Dielectric Strength, Oil rate of rise (short time): 500 V/S per ASTM D149 | 499 |
| Dissipation Factor, Test frequency: 1 MHZ per ASTM D150 | 0.0181 |
| Thermal Conductivity, BTU-in./hr, -ft2-oF per ASTM C177 | 6.65 |
Other Applications: Delay lines, pulse transformers, alarm systems, filters, magnetic components, and all applications where UL testing is required.
EL-CAST 760 with 4123
El-Cast 760 with 4123 is a filled two-component epoxy which features safe handling properties and high deflection temperatures with an overnight cure. It has excellent thermal conductivity and good flow qualities, making this product a very versatile system.
| Volume Resistivity, Applied voltage: 500 VDC @ 1 min. Ele. per ASTM D257 | 0.8 x 1016 |
| Dielectric Constant, Test frequency: 1 MHz per ASTM D150 | 5.17 |
| Dielectric Strength, Oil rate of rise (short time): 500 V/S per ASTM D149 | 432 |
| Dissipation Factor, Test frequency: 1 MHZ per ASTM D150 | 0.0212 |
| Thermal Conductivity, BTU-in./hr, -ft2-oF per ASTM C177 | 12.25 |
LED Encapsulation
United Resin has well-established epoxy systems that meet the needs of customers requiring epoxy LED encapsulating material and can formulate specific products to meet special requirements. Epoxy offers an excellent option for protecting LED dies or chips and related electrical contacts from environmental challenges such as moisture, dust, chemicals, vibration, general contamination and physical impact, while maintaining desired optical and aesthetic properties. An epoxy LED encapsulant provides superior resistance to environmental factors over other options, as well as excellent optical properties with high transparency enabling efficient light transmission. United Resin’s epoxy systems have superior adhesion properties, providing strong and reliable bonds and ensuring good thermal contact, contributing to longer term reliability of the device. United Resin’s LED encapsulants have low shrinkage and offer excellent optical and mechanical properties to ensure optimal performance and reliability. United Resin offers either soft or rigid encapsulating products, with excellent optical clarity. United Resin features a soft encapsulation system with superior clarity that provides the ability to cut into the encapsulant for any required repairs and replacements, thus prolonging the useful life of the device.
Crystal Clear Resin with 117 Hardener
This is a two-component unfilled epoxy system with low viscosity and low exotherm, with an overnight cure. It exhibits good thermal shock, low shrinkage, and chemical resistance. Applications include LED lighting, power supplies, magnetic components, marine sonar devices, and mass potting and encapsulating applications that require a tough, impact resistant casting. This is a softer system that allows for cut out replacement and re-pour for repairs as needed in an LED system.
| Specifications | HARDENER | COLOR | HARDNESS | MIXING RATIO | MAX. USE TEMP. | MIXED VISCOSITY | DIELECTRIC STRENGTH | DIELECTRIC CONSTANT | CTE | THERMAL CONDUCTIVITY-BTU | POT LIFE MINUTES | |
| SHORE "A" | (Parts by Weight) | ºF | CPS @ 72 ºF | as per ASTM D149 | as per ASTM D150 | in/in/ºF as per ASTM D696 | as per ASTM C177 | (100 gram Mass) | ||||
| @ 72 ºF | RESIN | HARDENER | @ 72 ºF | |||||||||
| 117 | Clear | 60 A | 100 | 87 | 300 | 3,000 | 460 | 5.12 | 2.18 x 10-5 | 1.7 | 180 | |
Crystal Clear Resin with 929 or 939 Hardener
This is a two-component unfilled epoxy system with low viscosity and good flow qualities. This system has excellent adhesion to ceramics and glass. Its high purity formulation prevents yellowing upon exposure to light. The material cures to a toughened state and is not brittle, making it ideal for thin bond lines and permanent LED placement.
| Specifications | HARDENERS | COLOR | HARDNESS | MIXING RATIO | MAX. USE TEMP. | MIXED VISCOSITY | DIELECTRIC STRENGTH | DIELECTRIC CONSTANT | CTE | THERMAL CONDUCTIVITY-BTU | POT LIFE MINUTES | |
| SHORE "D" | (Parts by Weight) | ºF | CPS @ 72 ºF | as per ASTM D149 | as per ASTM D150 | in/in/ºF as per ASTM D696 | as per ASTM C177 | (100 gram Mass) | ||||
| @ 72 ºF | RESIN | HARDENER | @ 72 ºF | |||||||||
| 929 | Clear | 80 | 100 | 22 | 200 | 600 | 450 | 5.41 | 1.46 x 10-5 | 1.7 | 7 hours | |
| 939 | Clear | 80 | 100 | 33 | 200 | 2,000 | 450 | 5.41 | 1.28 x 10-5 | 1.7 | 18 hours | |
Call us to discuss these systems or to discuss a new system to meet your specific requirements.