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4hv.org :: Forums :: High Voltage
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Using 'duct seal' on flyback pins?

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HM_Murdock
Tue Aug 17 2010, 02:20AM Print
HM_Murdock Registered Member #3075 Joined: Fri Aug 06 2010, 02:44PM
Location: Athens, GA
Posts: 148
Anyone here familiar with Duct Seal? I am thinking it would make an excellent material for insulating stray pins on my flyback...

It's meant for electrical applications, is non-conductive, and can be used and removed without a ton of trouble. As workable as soft modeling clay.

Link to duct seal at HD

The specs:

* Material is non-conductive, non-deteriorating, non-toxic, non-corrosive, non-staining, and non-curable
* Temperature range from -20° F (-29° C) to 350° F (175° C)
* Flash Point is over 550° F (285° C)
* Will not harden or form a skin under normal conditions
* MFG Brand Name : Gardner Bender
* MFG Model # : DS-110
* MFG Part # : DS-110
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Adam Munich
Tue Aug 17 2010, 03:11AM
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
This has always worked for me. Should last a lifetime.

Link2

My experience with clays like that; A spark will find a way through.
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radiotech
Tue Aug 17 2010, 03:25AM
radiotech Registered Member #2463 Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
Duct seal in the grey bars is used in electrical work to plug conduits to prevent moisture from getting in. In high voltage work it is used to build rounded and smooth surfaces when heavy lugs are bolted to terminals. That done, the whole assembly is taped up with high voltage tape like irithane. Result no corona air pockets and no sharp edges to eventually poke through the tape. Have used it on 13.8 kV.motors and switchgear. Why is it a dielectric voltage stress installation? Because of the way we layer the tape.

Of course, you can always buy 3-M HV boot kits.
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