Printable Version of Topic

Click here to view this topic in its original format

914World.com _ 914World Garage _ What is the best way to reseal the bottom of a relay board?

Posted by: Geezer914 Feb 18 2015, 07:53 AM

I removed the old cracked tar form the relay board. What is the best stuff to use on the bottom of a relay board to seal the copper strips?

Posted by: bulitt Feb 18 2015, 08:13 AM

There was a thread on using Plasti-dip.

Posted by: barefoot Feb 18 2015, 08:35 AM

QUOTE(Geezer914 @ Feb 18 2015, 08:53 AM)

I removed the old cracked tar form the relay board. What is the best stuff to use on the bottom of a relay board to seal the copper strips?

Epoxy would be good as it's non-conductive.
I use the WEST system stuff sold at most marine stores cause I do some marine fabrications

Probably the stuff you can clear coat table tops with would work as well
Acrylic I think

Posted by: Bartlett 914 Feb 18 2015, 08:50 AM

I used a product from Smooth-on

http://www.smooth-on.com/Urethane-Rubber-an/c6_1117_1150/index.html

It pours thin. Be sure to plug any holes around the contacts or it will pour through

Posted by: BeatNavy Feb 18 2015, 09:00 AM

I used Liquid Tape from Home Depot. I think I'd read a thread about this topic from way earlier and that's what was recommended. Only did it a month ago so I can't vouch for its long term effectiveness. It does go on thin.

Posted by: StratPlayer Feb 18 2015, 10:12 AM

Liquid tape

Posted by: timothy_nd28 Feb 18 2015, 10:13 AM

For circuit boards, I use humiseal

Posted by: Markl Feb 18 2015, 10:28 AM

I used spray-on Plasti-Dip several years ago - still looks like new. I'd shy away from using anything too difficult to remove, just in case.

Posted by: Geezer914 Feb 18 2015, 10:29 AM

Thanks for all the info. I just ordered a tube of Dow Corning 737 sealer, says for use on plastic and glass, from McMaster Carr.

Posted by: Dave_Darling Feb 18 2015, 11:42 AM

Trot over to Radio Shack (or your local electronics store) and look for some "potting compound".

--DD