 Encapsulate Grounds in Butyl ? |
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| Literati914 |
 Mar 28 2025, 02:07 PM
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#1
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Advanced Member  Group: Members Posts: 2,235 Joined: 16-November 06 From: Dallas, TX Member No.: 7,222 Region Association: Southwest Region  |
Having read so many threads recommending to check grounds for various issues- I've been thinking about adding well formed "caps" made of Butyl tape ('cause I got plenty on hand).
Besides being a little messy upon disassembly, particularly on ground points with multiple grounds - are there any less-than-obvious drawbacks to using butyl rubber tape to form encapsulating 'caps' for the purpose of corrosion protection over ground points? I'd be considering this for exterior grounds lug areas in particular. I know there are specific products for this purpose but I've got plenty of butyl on hand and it kind of seems more permanent too. Anyone done this? |
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| Root_Werks |
Mar 28 2025, 02:16 PM
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#2
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Village Idiot Group: Members Posts: 8,929 Joined: 25-May 04 From: About 5NM from Canada Member No.: 2,105 Region Association: Pacific Northwest 
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You know, may not be such a bad idea. Maybe a dot of dielectric grease on the terminals beforehand?
Having some extra butyl myself, used some on my Bug where the throttle, clutch etc. tubes enter the center tunnel. Worked great. |
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| brant |
Mar 28 2025, 02:22 PM
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#3
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914 Wizard Group: Members Posts: 12,167 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains 
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Try the chemical De-oxit
It’s a great electrical product |
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| flxzcat |
Mar 28 2025, 02:31 PM
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#4
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Member Group: Members Posts: 101 Joined: 13-June 11 From: Lake Forest, So. Cal. Member No.: 13,188 Region Association: Southern California |
check temperature rating?
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| Literati914 |
Mar 28 2025, 04:49 PM
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#5
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Advanced Member Group: Members Posts: 2,235 Joined: 16-November 06 From: Dallas, TX Member No.: 7,222 Region Association: Southwest Region |
QUOTE(brant @ Mar 28 2025, 03:22 PM)  Try the chemical De-oxit It’s a great electrical product I actually have some left over from cleaning up my vintage Marantz receiver.. but since my 914 is basically newly rebuilt and grounds are clean - I'm thinking the butyl would keep you from needing to (ever?) clean the connections again. QUOTE(flxzcat @ Mar 28 2025, 03:31 PM) check temperature rating? A quick search says -40f to 300f. |
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| JeffBowlsby |
Mar 29 2025, 09:21 AM
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#6
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914 Wiring Harnesses & Beekeeper Group: Members Posts: 9,222 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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NOT a fan of dielectic grease on automotive electrical connections. It attracts dirt and the only remedy is the disassemble and thoroughly clean.
As for the butyl tape idea, I would think it would be difficult to conform to make an air/water tight condition. Butyl theoretically never hardens (it does with a enough time and heat) and its butyl. Ever tried cleaning that stuff up? Maybe consider brushing on a potting compound, but the cleanup would be insane if it ever needed servicing. The butyl concept is interesting but the approach may have questionable results. Probably better to resort to the traditional maintenance method of periodically wire brush and chemical clean (DeOxit). |
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| JmuRiz |
Mar 29 2025, 08:53 PM
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#7
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914 Guru Group: Members Posts: 5,623 Joined: 30-December 02 From: NoVA Member No.: 50 Region Association: MidAtlantic Region
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Good idea on the deoxit, I got some for refurbishing Halloween
decorations and my dad’s old stereo equipment too. I have a bad ground on a PO’s fender repair. I think they were mentioning butyl caulk over a properly cleaned/grounded connection. I think for how rarely our cars are driven/parked in the rain, it might. It be necessary. |
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| euro911 |
Mar 29 2025, 09:11 PM
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#8
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Retired & living the dream. God help me if I wake up! Group: Members Posts: 8,937 Joined: 2-December 06 From: So.Cal. & No.AZ (USA) Member No.: 7,300 Region Association: Southern California
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Try brushing on 'Liquid Tape' It works great
https://www.homedepot.com/p/Gardner-Bender-...B-400/100119178 |
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