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Electrically Conductive Adhesives

MG Chemicals offers a variety of electrically conductive adhesives for the assembly and repair of electronics. They provide strong adhesion to many surfaces where soldering is not an option.

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Electrically Conductive Adhesives
8331D - Silver Conductive Epoxy Adhesive

8331D – Silver Conductive Epoxy Adhesive

8331D is a 2-part electrically conductive epoxy that is an improved version of our silver-filled epoxy, 8331. The glue is smooth, non-sag, thixotropic, and bonds well to a wide variety of substrates. This conductive epoxy resin finds use as a cold solder for mounting heat sensitive components.

Electrically conductive epoxy resin such as the 8331D is useful for making repairs on conductive traces. The cured epoxy is durable and withstands harsh climates making it ideal for repairing worn copper traces. The glue is highly conductive to carry current. The epoxy bonds well to many surfaces including metal, wood, glass and most plastics.

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8331S – Silver Conductive Epoxy Adhesive

8331S – Silver Conductive Epoxy Adhesive

This electrically conductive paste is a 2-part heat-cured epoxy with a long working time. This electrically conductive glue is smooth, non-sagging, and bonds well to a wide variety of substrates. The adhesive passes outgassing specification ASTM E595

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8331D - Silver Conductive Epoxy Adhesive

8331D – Silver Conductive Epoxy Adhesive

8331D is a 2-part electrically conductive epoxy that is an improved version of our silver-filled epoxy, 8331. The glue is smooth, non-sag, thixotropic, and bonds well to a wide variety of substrates. This conductive epoxy resin finds use as a cold solder for mounting heat sensitive components.

Electrically conductive epoxy resin such as the 8331D is useful for making repairs on conductive traces. The cured epoxy is durable and withstands harsh climates making it ideal for repairing worn copper traces. The glue is highly conductive to carry current. The epoxy bonds well to many surfaces including metal, wood, glass and most plastics.

Read More »
8331S – Silver Conductive Epoxy Adhesive

8331S – Silver Conductive Epoxy Adhesive

This electrically conductive paste is a 2-part heat-cured epoxy with a long working time. This electrically conductive glue is smooth, non-sagging, and bonds well to a wide variety of substrates. The adhesive passes outgassing specification ASTM E595

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Electrically conductive epoxy is a way to cold solder components to PCBs. When electronic devices cannot withstand solder temperatures, simply apply the epoxy which cures at low temperatures. The cured epoxy is tough and able to resist harsh climates and chemicals. These adhesives offer not only electrical but also thermal conductivity, helping manage heat in devices.

The glue is ideal for bonding and sealing applications where EMI/RFI is a requirement. Users can make form-in-place gaskets with ECAs although they should note the material is not highly flexible. The adhesive is soft enough to compress thin or can apply thick as a gap filler. Options for ECAs include adhesive with different working times and conductivities.

 

  • High electrical and thermal conductivity – Makes electrical traces and bridge parts
  • Wide range of working times – Allows users to select products that match their volume requirements
  • Strong adhesion – Bonds well to many plastics, metals, glass and composites
  • Die Attachment for LEDs – Removes need to solder for heat sensitive components
  • Trace Fabrication and Repair – ECAs can apply over PCBs through stenciling to make electrically conductive traces
  • Cold Soldering – Can attach PCB parts at low temperatures for heat-sensitive substrates
  • EMI Gaskets – fills seams and gaps where radiation leakage can occur

The cured adhesive is not conductive

First, you need to know if the adhesive cured fully. The cured adhesive should have a hard consistency and is not tacky to the touch. If the adhesive appears cured, it may be that the cured sample has insufficient silver. Contact technical support for further discussion [email protected]

What is the tolerance in terms of discrepancies with the mix ratio?

The thick consistency of these adhesives makes it difficult to dispense an accurate amount of material. We suggest using a scale and weighing out the individual components using the mix ratio by weight. Differences of 5% from the target amount of the mix ratio do not prevent the epoxy from curing.

How can I make the adhesive more flowable?

You can lower the thickness by adding a bit of solvent like acetone to the dispensed material and mixing. For 2-part products, only add solvent after you’ve measured out and mixed the 2 components. Add solvent dropwise as small amounts can make a noticeable change to the thickness.

Can I machine the cured epoxy?

Once cured, you can machine the epoxy to some extent like sanding and polishing. The high filler content makes it quite brittle so we do not suggest machining like drilling.

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