What type of resin for circuit encapsulation?

Why epoxy resins are preferred for circuit protection

For electronic encapsulation, epoxy resins are widely chosen thanks to their excellent electrical insulation properties and strength. They cure to form a solid barrier, minimising the risk of shorts or corrosion. When selecting a resin, it’s best to opt for a formula that offers a low exothermic reaction during curing, which helps prevent damage to sensitive components. A slow, steady cure is especially important for larger pours or delicate circuits.

Selecting the right product for your project

When comparing products, look for resins that specifically highlight low heat generation, high clarity, and robust protection. EpoxyTable 5-Five is an example of a deep pour epoxy resin suitable for electronics, thanks to its low exothermic reaction and durable finish. For coating custom housings or small parts, a fast-setting resin like 3D Finish is also useful, delivering a smooth, protective layer without masking fine details.

Practical use tips and application guidance

• Always measure and mix resins accurately according to the manufacturer’s instructions to ensure full curing and optimal insulation properties.
• Pour resin in thin layers for large or sensitive circuit boards to limit temperature build-up.
• Allow sufficient time for the resin to cure at room temperature in a dust-free area to avoid surface defects.