Anyone know exactly how conductive this stuff is? Resistivity value?

It's volume resistivity is .0004 ohm-m when cured properly according to the manufacturer.

Can you solder to this epoxy when fully cured?

You should solder first, and then coat with conductive epoxy and cure. The epoxy typically improves the electric contact accomplished by soldering. Good luck!

will a fresh mix of this epoxy bond to the cured epoxy?

I do not know. After a careful reading of the warnings and dangers of this product I put it on the shelf unused. I learned how to solder. Just saying.

Does this stuff ever harden or is it always soft?

The stuff hardens in about 1 hour. It is dispensed from a hypodermic type dispenser and can be mixed with a kitchen knife or small spatula. Have some alcohol readily available to clean up your mixing and apply tool and possibly you. I found that it conducted current quite well. When you are mixing and using this product it reminds me of using bondo.

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8331D Silver Conductive Epoxy Adhesive, High Conductivity, 20 min Working time, 14 Gram Kit (8331D-14G)

8331D Silver Conductive Epoxy Adhesive, High Conductivity, 20 min Working time, 14 Gram Kit (8331D-14G)

Product ID: 580590147

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Details

Brand
MG Chemicals
Specific uses for product
Electronic
Material
Epoxy Resin
Item form
Liquid
Special features
Strong

⏳20 min working time

⚡High conductivity

🧪14g kit size

Description

🔌 Connect with Confidence!

⏳ QUICK SETUP - Enjoy a 20-minute working time, perfect for fast-paced projects.
🔗 STRONG ADHESION - Excellent bonding to glass, soft metals, and plastics, ensuring durability in every application.
⚡ UNMATCHED CONDUCTIVITY - Achieve superior electrical connections with a resistivity of just 1.8 x 10-3 Ω·cm.
🧪 VERSATILE APPLICATION - Ideal for bonding heat-sensitive components, replacing traditional soldering methods.
🌡️ OPTIMAL PERFORMANCE - Cures at room temperature, but heat curing maximizes conductivity for top-tier results.

The MG Chemicals 8331D Silver Conductive Epoxy Adhesive is a high-performance adhesive designed for creating strong, permanent electrical connections. With a working time of 20 minutes and a 14-gram kit, it offers exceptional conductivity and adhesion to various substrates, making it an ideal choice for both professional and DIY projects.

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