 What is the best way to reseal the bottom of a relay board? |
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| Geezer914 |
 Feb 18 2015, 07:53 AM
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#1
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Geezer914  Group: Members Posts: 1,445 Joined: 18-March 09 From: Salem, NJ Member No.: 10,179 Region Association: North East States 
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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?
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Replies(1 - 9)
| bulitt |
Feb 18 2015, 08:13 AM
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#2
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Achtzylinder Group: Members Posts: 4,188 Joined: 2-October 11 Member No.: 13,632 Region Association: South East States |
There was a thread on using Plasti-dip.
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| barefoot |
Feb 18 2015, 08:35 AM
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#3
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Senior Member Group: Members Posts: 1,281 Joined: 19-March 13 From: Charleston SC Member No.: 15,673 Region Association: South East States
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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 |
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| Bartlett 914 |
Feb 18 2015, 08:50 AM
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#4
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Advanced Member Group: Members Posts: 2,216 Joined: 30-August 05 From: South Elgin IL Member No.: 4,707 Region Association: Upper MidWest |
I used a product from Smooth-on
Casting rubber It pours thin. Be sure to plug any holes around the contacts or it will pour through |
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| BeatNavy |
Feb 18 2015, 09:00 AM
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#5
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Certified Professional Scapegoat Group: Members Posts: 2,924 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region
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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.
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| StratPlayer |
Feb 18 2015, 10:12 AM
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#6
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StratPlayer Group: Members Posts: 3,278 Joined: 27-December 02 From: SLC, Utah Member No.: 27 Region Association: Rocky Mountains 
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Liquid tape
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| timothy_nd28 |
Feb 18 2015, 10:13 AM
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#7
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Advanced Member Group: Members Posts: 2,299 Joined: 25-September 07 From: IN Member No.: 8,154 Region Association: Upper MidWest
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For circuit boards, I use humiseal
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| Markl |
Feb 18 2015, 10:28 AM
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#8
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Member Group: Members Posts: 75 Joined: 14-September 09 From: Colorado Member No.: 10,802 Region Association: Rocky Mountains |
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.
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| Geezer914 |
Feb 18 2015, 10:29 AM
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#9
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Geezer914 Group: Members Posts: 1,445 Joined: 18-March 09 From: Salem, NJ Member No.: 10,179 Region Association: North East States
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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.
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| Dave_Darling |
Feb 18 2015, 11:42 AM
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#10
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914 Idiot Group: Members Posts: 14,991 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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Trot over to Radio Shack (or your local electronics store) and look for some "potting compound".
--DD |
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