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High Voltage Silicone Sealant

Printed From: ukVac.com
Category: Technical
Forum Name: Tech, Maintenance & Repairs
Forum Description: Need Help? Ask Here
URL: http://www.ukvac.com/forum/forum_posts.asp?TID=375296
Printed Date: 27 Feb 2020 at 4:41am


Topic: High Voltage Silicone Sealant
Posted By: Liam
Subject: High Voltage Silicone Sealant
Date Posted: 14 Feb 2020 at 10:41am
I had some of this before, which I think I bought from eBay, but now I can't find any for sale anywhere. Was it banned or something?

It's very handy for sealing anode cups that are inclined to discharge even after being cleaned, and I used it to seal small HV leaks elsewhere. Where can I get some now? Any help will be appreciated.




Replies:
Posted By: andyman
Date Posted: 14 Feb 2020 at 10:50am
https://uk.farnell.com/acc-silicones/as1701-75ml/sealant-silicone-neutral-cure/dp/8497516

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Posted By: ColinD
Date Posted: 14 Feb 2020 at 11:53am
I'd be more inclined to use a thin smear of HV Silicone Grease on an anode cap.   

You can easily replace the cap if it's damaged and you can redo the dope around the electrode too.


Posted By: Liam
Date Posted: 14 Feb 2020 at 2:07pm
I used to have HV silicone, but I think I threw away the remainder when the tube began to leak. I thought it would be as easy to get again as it was the first time. I'm not sure if that stuff from Farnell is for HV applications.

Meanwhile, I found this on AliExpress:
https://www.aliexpress.com/item/33003396926.html" rel="nofollow - https://www.aliexpress.com/item/33003396926.html



Posted By: Purity
Date Posted: 14 Feb 2020 at 3:28pm
I've resealed around the anode cap before with some HV varnish.  I think the recommended one is Corona Dope - think you can get it on Amazon.  I used some HV varnish off eBay

Don't know if that helps or not?


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Posted By: Liam
Date Posted: 16 Feb 2020 at 9:15pm
Yeah, that Corona Dope looks like the thing. Thanks.


Posted By: Retromanic2
Date Posted: 17 Feb 2020 at 10:59am

You can get it from this site:-
http://brocott.co.uk/electrical-insulating-air-drying-varnish-100ml-black/" rel="nofollow - http://brocott.co.uk/electrical-insulating-air-drying-varnish-100ml-black/

They do different colours, also sell copper wire if you need to do any yoke rewinds.


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