Epotek H70E-2 is a two-part, thermally conductive epoxy with an extended pot life of around two days. It is based on the popular H70E, but it stays workable for much longer. As a result, it suits high-volume dispensing on automated SMT lines.

Why choose Epotek H70E-2?

Many epoxies start to thicken in the dispenser after a few hours. This causes uneven dots, clogged needles and wasted material. For this reason, H70E-2 is made to keep a stable viscosity over a long working time. You can load a reservoir and run it for longer with fewer changeovers.

The epoxy moves heat away from hot parts, with a thermal conductivity of 1.0 W/mK. At the same time, it is an electrical insulator. It cures with heat only, which gives it a high glass transition temperature (Tg). In addition, it stands up well to harsh thermal cycling.

Key features

• Extended pot life of around two days
• Thermal conductivity of 1.0 W/mK
• Electrically insulating
• Heat cure system with a high Tg
• Strong resistance to thermal cycling
• Low outgassing for use near optics

Where to use Epotek H70E-2

This epoxy suits demanding electronics where heat must be managed. For example, it is a good fit for:

• Heat sink attachment
• Power module encapsulation
• Automotive electronics
• Aerospace hardware
• Assemblies near sensitive optics

Because it has low outgassing, it will not cloud lenses or coat nearby parts. This helps protect sensitive electronics and optics. It also keeps a strong, heat-dissipating bond under mechanical and thermal stress.

Tips for best results

First, mix both parts well until the colour is even. Next, dispense onto clean, dry surfaces. Then cure the part with heat, since this epoxy will not cure at room temperature. Always check the datasheet for the exact mix ratio and cure schedule.

Need help choosing an adhesive?

OnBoard Solutions supplies Epotek adhesives to manufacturers across Australia. You can browse our thermally conductive adhesives or view our full adhesives range. Alternatively, contact our team to order Epotek H70E-2 today. We will help you find the right product for your application.