Electrically Conductive Adhesives

Progressive Engineers is reliable and trusted supplier of Mg Chemicals Silver Conductive Epoxy. 8331D is an electrically conductive, 2-part silver epoxy adhesive. It is an improved version of our legendary silver-filled epoxy adhesive, 8331. It is smooth, non-sagging, thixotropic, and bonds well to a wide variety of substrates.

This electrically conductive silver epoxy allows for quick, cold-soldering repairs. It is considered a solder replacement epoxy for bonding heat-sensitive electronic components, or for making conductive connections where soldering is not an option, such as when bonding to glass, soft metals, or plastics. It provides excellent EMI/RFI shielding and is very effective in filling seams between metal plates.

This DIY conductive epoxy has been formulated to be economical.

Features & Benefits

• High electrical conductivity


• Convenient 1 to 1 mix ratio


• Working time: 20 minutes


• Cure time: 6 hours at room temperature or 10 minutes at 65 °C (149 °F)


• Creates strong permanent electrical connections


• Cures at room temperature


• SVHC free


• Excellent adhesion to many substrates


• Room temperature storage


• Long shelf life


• Strong resistance to humidity, salt water, mild bases, and aliphatic hydrocarbons

Choose us and order silver conductive epoxy 8331s for your use today.

8330 is an electrically conductive, silver-filled 2-part epoxy adhesive. It is smooth, non-sagging, thixotropic, and bonds well to a wide variety of substrates. This product allows for quick, cold-soldering repairs. It can also be used as a solder replacement for bonding heat-sensitive electronic components, or for making conductive connections where soldering is not an option, such as when bonding to glass, soft metals, or plastics.

8330 is highly filled to maximize electrical conductivity. For a more economical version, use 8331. For a longer working life, use 8330S.

We are a distinguished Supplier of Silver Conductive Epoxy (8330S). The 8330S Silver Conductive Epoxy Adhesive is an electronic grade epoxy that combines a long working time and high conductivity with ease of use. It has a convenient 1-to-1 mix ratio and 45 hours pot life, which once mixed behaves essentially like a 1-part adhesive for the duration of a work shift. However, unlike 1-part adhesives that often require high heat (130170^oC), it will cure at 65^oC in less than 2 hours. The cured conductive adhesive bonds very well to most of the substrates used in electronic assemblies. It resists thermal and mechanical shocks and provides the low-resistivity needed for many operating conditions. The 8330S epoxy adhesive forms excellent high-conductivity seals, bonds, and traces for electronic devices in the automobile, aerospace, marine, communication, and industrial control.

Features :

• Excellent 0.0007 cm electrical resistivity and 1.75 W/(m·K) thermal conductivity
• Easy 1:1 mix ratio and long working time may be mixed once and then used as a 1-part epoxy for a four-hour production shift
• Optimal cure temperature of only 65^oC lower than most 1-part epoxies and suitable for use on heat sensitive components
• Stores and ships at room temperature no freezing or dry ice required
• Very long shelf life of at least two years even when stored at room temperature
• Strong water and chemical resistance to brine, acids, bases, and aliphatic hydrocarbons
• Room temperature cure is possible (96 hours)
• Excellent adhesion to most electronic substrates

Applications :

• The 8330S epoxy has many uses in the production, repair, and assembly of electronics in microelectronics and optoelectronics.
• It has been designed for the production environments as a replacement for one part silver conductive epoxy systems when high cure temperatures can potentially damage the heat-sensitive components or where frozen storage requirements or shelf life of one part epoxies are a concern.
• Like all conductive epoxies, it operates as a lead-free replacement for metal solder and it excels at bonding heat-sensitive electronic components.
• It also provides excellent EMI/RFI shielding and is very effective in filling seams between the metal plates.

Application Instructions : Follow the procedure below for best results. Heat cure is recommended to get the best possible conductivity.

To prepare 1:1 (A:B) epoxy Mixture :

• Remove cap or cover.
• Measure one part by volume of A.
• Measure one part by volume of B.
• Thoroughly mix the parts together with a stir stick until homogeneous.
• Apply to with an appropriate sized stick for the application area.

Note :

• Remember to recap the syringe or container promptly after use.
• Tip - Due to the high viscosity and abrasiveness of the silver filler, you may preheat part A and part B to increase the flow and improve air release.

To Heat Cure the 8330S Epoxy :

• Put in oven at 65^oC [149^oF] for 60 minutes or above. For optimum conductivity and faster cure, heat cure at temperatures up to 100^oC.
• Tip - Hair dryers are normally rated not to exceed 60^oC, so they can generally be used to accelerate the cure.
• You can cure the epoxy faster by using higher temperatures of up to 100^oC [212^oF].
•  Keep the curing temperature well below temperature limit of heat sensitive components that may be present. As a guideline, remember that commercial grade devices normally can be safely operated up to 70^oC, industrial grade up to 85^oC, and military grade up to 175^oC.
• Attention - Heat guns can easily exceed the temperature limits for your assembly: they should not be used.
• To room temperature cure the 8330S epoxy:
• Let it stand for 96 hours or more.
• Tip - While the product can be cured at room temperature, the best conductivity is achieved with the application of some heat.

8331D is an electrically conductive, 2-part silver epoxy adhesive. It is an improved version of our legendary silver-filled epoxy adhesive, 8331. It is smooth, non-sagging, thixotropic, and bonds well to a wide variety of substrates.

This electrically conductive silver epoxy allows for quick, cold-soldering repairs. It is considered a solder replacement epoxy for bonding heat-sensitive electronic components, or for making conductive connections where soldering is not an option, such as when bonding to glass, soft metals, or plastics. It provides excellent EMI/RFI shielding and is very effective in filling seams between metal plates.

This DIY conductive epoxy has been formulated to be economical. For a higher fill that maximizes conductivity, use 8330D. For a longer working time, use 8331S.

For a 1-part alternative use 9410 or 9400.

We also offer a full line of thermally conductive electrically insulating epoxy adhesives.