Find the right gasket material for your EV application at Hisco

With the growth and expansion of eMobility, there's a rising need for lightweight batteries that offer longer driving ranges and shorter charging times. To extend the life of these revolutionary batteries and improve reliability and safety, the battery enclosure must be protected against vibration and extreme weather conditions.

Why do gaskets matter?

In the automobile industry, high-performing and reliable gasket sealant materials are essential to running processes smoothly. The reason is that leaks or unintended fluid intrusions lead to downtime, work stoppages and increased costs.

Therefore, it's essential to rely on top-notch gasketing materials that fill the gap between the surfaces of the flanges to prevent any leakage or the entry of fluids or gases.

What's the most crucial factor when selecting a gasket?

The best type of gasket material for an EV battery will depend on the specific application. Some factors to consider are the environmental conditions, the chemicals the battery will be exposed to, and the temperature range in which the battery will operate.

Certain specialty materials are specifically engineered for use with EV batteries. These materials may offer additional properties like fire resistance, EMI shielding or self-healing capabilities.

Common types of gasket materials for EV batteries

Silicone rubber is a versatile material known for its excellent chemical resistance, high-temperature tolerance and low compression set. It's ideal for gaskets that seal against corrosive chemicals or high temperatures.

Polyurethane foam is lightweight, flexible, and has good compression set resistance. It's also resistant to moisture and chemicals.

Acrylic foam is a newer material gaining popularity for EV battery gaskets. It's very lightweight, has excellent compression set resistance, and is resistant to moisture, chemicals and heat.

Butyl rubber is a good choice for EV battery gaskets that need to seal against moisture. It's also resistant to chemicals and has good compression set resistance.

EPDM rubber is a good choice for EV battery gaskets that must resist weather and UV radiation. It's also resistant to chemicals and has good compression set resistance.

Gasket Types

Die-Cut Gaskets

A die-cut gasket is custom-manufactured by companies like Precision Converting, a division of Hisco, using a specialized tool to cut and shape the materials into precise configurations. Among the many benefits of die-cut gasket is their ability to be customized to suit virtually any size or shape requirement. When produced in large volumes, die-cut gaskets are an inexpensive alternative which can be reproduced indefinitely. Die-cut gaskets are typically engineered to withstand thermal and pressure extremes without the threat of leaks.

Form-in-Place Gaskets

Well-suited for use with virtually any industry, form-in-place gaskets are dispensed using a CNC machine, a service offered by Precision Converting - a division of Hisco. Because they are produced by dispensing a liquid material, form-in-place gaskets will provide an exact fit-to-form for a extremely reliable seal. Highly adaptable and quickly produced without additional assembly requirements, form-in-place gaskets can be developed to withstand a range of conditions while also replicating small and intricate detail.

Cure-in-Place Gaskets

Dispensed in liquid or gel form, cure-in-place gaskets are a type of form-in-place gasket that can achieve rapid cure through broad-spectrum UV or LED light systems. Engineered for extreme precision, cure-in-place gaskets offer performance that exceeds that of traditional die-cut options. Production is typically automated, ensuring quick processing times and consistent gasket quality. Necessary modifications are achieved in seconds for minimal production disruptions, and cured gaskets are easily removed should replacement become necessary.

Extruded Silicone Gaskets

Extruded silicone rubber gaskets are a popular option for industrial sealing applications thanks to an array of benefits. Engineered for exceptional flexibility and elasticity, extruded silicone gaskets are designed to withstand weather extremes while maintaining peak performance in high temperatures of up to 450 F° or as low as -50 F°. Highly durable, extruded silicone gaskets offer exceptional ozone and UV resistance in addition to excellent thermal and electrical insulation. Available in both silicone and fluorosilicone formations, extruded silicone gaskets are easily customized to match any shape or sizing requirement.

Any Shape, Size or Material — Customize Your Gasket with Precision Converting

As a Rogers and 3M Preferred Converter, Precision Converting offers unrivaled access to materials and technologies to support your EV application. From custom die-cut gaskets to form-in-place options for an exact fit-to-form, Precision Converting engineers partner with you to address your specific production requirements with optimal precision and timely, innovative solutions.

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Hisco knows that finding the right gasketing solutions can be challenging. Let us help!

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