LORD Corporation

With more than 3,100 employees in 26 countries, 19 manufacturing facilities and 10 R&D centers worldwide, we're there for our customers.

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ev charger inductor in LORD CoolTherm potting material

Potting & Encapsulation Materials

Our encapsulant and potting solutions provide a robust thermal management interface resulting in reliable products for you and your customers. These materials improve performance by optimizing heat dissipation with high thermal conductivity and low viscosity. They also protect components from dust and moisture and help reduce vibration.



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Thermally Conductive Potting & Encapsulation

Potting and encapsulation products deliver a robust thermal interface and electrical insulation resulting in reliable electronics. These CoolTherm thermally conductive solutions improve performance by dissipating heat, protecting fragile components, and reducing stress. The products can be used on electric vehicle batteries, motors, and chargers, as well as other power electronics. 

Non-Thermally Conductive Potting & Encapsulation

Not every design requires heat management. These materials are crucial in applications where fragile electronics need to be protected from environmental and chemical corrosion and vibration. Our potting and encapsulants can be used for the electronic assembly of ignition coils, printed circuit boards, engine control modules, transmission control modules, sensors, power supplies, transformers, and other critical electronic equipment.

Differences in Thermally Conductive Chemistries

With the increasing demand of electric vehicles, we're formulating silicone, epoxy, urethane and acrylic chemistry solutions to meet the thermal management needs of our customers.

Potting & Encapsulation Applications

Battery Packs

As battery technology evolves towards increased energy density, the ability to manage heat during charge and discharge cycles is crucial for optimizing performance. Our CoolTherm thermal management materials are fully customizable and compatible with cylindrical, pouch and prismatic battery cells. 

Charging Systems

CoolTherm solutions improve proper heat flow in inductors and transformers, optimize performance during charging and discharging, and increase product longevity. Since these products have a low viscosity, they flow easily into the tiniest crevices, enabling better impregnation of irregularly-shaped magnetic components and helping to reduce inductor hum. 

Electric Motors

Thermally-conductive epoxy and silicone encapsulants help manage heat,which enables you to increase the power density and life of your electric motor. Our studies have shown a temperature decrease of up to 50°C or an increase in power output up to 30% when using CoolTherm materials.

Featured eBook

Thermal Management for Electric Vehicles and Electronics

Learn from our experts about innovative and effective techniques for managing heat in electric vehicles including: automobiles, buses, trains, off-road vehicles, aircraft and more. Our ebook outlines different types of thermal interface materials, how to choose the correct type, meter mix dispense (MMD) equipment and more.

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How Potting Helps with Thermal Management
Learn more about how potting materials can help manage the heat in your electronic applications.
Why Should You Care About Heat in EV Design?
The electric vehicle (EV) industry is rapidly growing and improving, but one constant remains: the need to combat overheating.

Downloadable Resources

For years, motor designers have been battling heat in motor designs. Download our white paper to read how potting your electric motor can yield improved performance, reliability, and efficiency.
A key challenge in developing higher power density electronics for electric vehicles and other applications is to manage the heat generated by smaller, high-power devices. Thermally conductive potting compounds are an ideal method for rapidly and effectively conducting heat away from power components to the heat sink.
Excess heat can reduce the reliability of motors and shorten their lifetimes. Good thermal management in electric machines allows for cooler, higher-density motors.


Why would I pot a motor?

Motor potting can provide several benefits for motors, including increased durability, protection from the environment, and improved power density.  A rigid material, like epoxy, provides additional structural strength to the motor and reinforces (or replaces) the varnish to hold the wires firmly in place. Epoxies can also protect from environmental contamination, including particulates, moisture, and chemical solvents or oils. A more flexible material, like silicone or urethane, is not as mechanically strong but can provide some protection against vibration and environmental contamination.

Thermally conductive potting materials (silicone, urethane, and epoxy) can transfer heat from the coils to the motor heat sink and decrease the operating temperature significantly, which improves power density, efficiency, and life of the motor. The amount of improvement depends on both the motor design and the duty cycle under which the motor operates.

What is motor potting?

Motor potting is the process of filling in all the air gaps around the coils in a motor (usually the stator, but sometimes also the rotor) with some type of thermoset material. The thermoset material is usually epoxy, urethane, or silicone potting material. The potting material usually flows easily and self-levels so that all the air spaces around the coils are filled. If the motor has a frame, the potting material also makes a connection to the frame that can provide additional mechanical stability, protection from the elements, and/or enhanced transfer of heat away from the windings. End winding potting is used to fill in the spaces just around the end windings of a motor that has had varnish applied previously, whereas global potting involves the use of potting material to act both as a varnish, filling in all air gaps between wires in the stator slots, and as an end winding potting material. 

Whether you need end winding or global potting will be determined by your motor design. Consult with your potting material supplier to find the material that is right for your needs.

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