Question about epoxy.

  • Thread starter yungman
  • Start date
  • #1
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What is the conductivity of epoxy when dry? Also is there any expansion or contraction when epoxy cure? That is if you fill epoxy in a gap, would it pull or push the two side when dry?

Thanks
 

Answers and Replies

  • #2
884
34
Epoxy comes in many varied types and materials
 
  • #3
Most epoxies have poor thermal and electrical conductivity and are also non-magnetic. However, you can get conductive metal-filled epoxies. You can also get epoxy with high thermal conductivity and low electrical conductivity which are used in electronics. And there is usually no expansion or contraction after curing. You may find what you need here:
http://www.mcmaster.com/#epoxies
 
  • #4
5,588
209
Thanks for the reply. I definitely need non conductive type. I use it to cover electronic surface mount components on printed circuit board. I want the type that is opaque so people cannot see through. I need it to not expend or contract when set because I have seen potting materials pulling components apart when set and the circuit board stop working after potting.

Thanks for all your help as I don't know anything about epoxy.
 
  • #5
5,588
209
Anyone please?
 
  • #8
enigma
Staff Emeritus
Science Advisor
Gold Member
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What you're looking for is called 'conformal coat'.
 
Last edited:

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