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Old 04-07-2019, 21:48   #1
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Protective film for electrical connections

Looking for recommendations for an anti-corrosion spray to apply to electrical connections. I could use dielectric grease, but I’m sure there’s a spray product that’s is more robust. TIA.
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Old 04-07-2019, 22:42   #2
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Re: Protective film for electrical connections

WD40 or Vaseline/petroleum jelly
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Old 04-07-2019, 23:22   #3
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Re: Protective film for electrical connections

CRC Heavy Duty Corrosion Inhibitor is a heavy waxy grease coating that is very effective and long lasting.

Boeshield T9 is my favorite. It dries to a waxy coating that is less messy than grease type coatings.

If I recall correctly Practical Sailor liked both of these. They also liked petroleum jelly but you had asked for sprayable products.
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Old 05-07-2019, 00:05   #4
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Re: Protective film for electrical connections

This Star Brite Liquid Electrical Tape is used to protect all the main power supplies / returns to both my engines.

It works great.
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Old 05-07-2019, 00:11   #5
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Re: Protective film for electrical connections

Lanolin spray and fish oil spray are effective and relatively cheap.
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Old 05-07-2019, 03:32   #6
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Re: Protective film for electrical connections

Yes, I am a Lanolin addict, but I am not using it on solder connections, circuitboards.
I am sure that all the above sprays and stuff work, but I guess if one has to re-solder..... the grease products will prevent a good solder connection?
Happy to be proven wrong.
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Old 05-07-2019, 03:54   #7
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Re: Protective film for electrical connections

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Originally Posted by HankOnthewater View Post
Yes, I am a Lanolin addict, but I am not using it on solder connections, circuitboards.
I am sure that all the above sprays and stuff work, but I guess if one has to re-solder..... the grease products will prevent a good solder connection?
Happy to be proven wrong.

O.M.G.



You've just opened one humongous can of worms.


You've mentioned the word "solder" in the context of a connection on a boat.
Be that as it may, Lanolin has high dielectric strength and low melting point. This would make it a good choice and shouldn't pose any serious re-soldering problems although you're supposed to only crimp then there's be no need to resolder in the first place .



Silicon grease would be the worst, imo, as it can have a high melting point. Everything else in between. I haven't done an awful lot of soldering on oil coated wires, but anything hands down would have to be better than trying to solder corroded copper strands.
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Old 05-07-2019, 05:05   #8
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Re: Protective film for electrical connections

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Originally Posted by Reefmagnet View Post
O.M.G.



You've just opened one humongous can of worms.


You've mentioned the word "solder" in the context of a connection on a boat.
Be that as it may, Lanolin has high dielectric strength and low melting point. This would make it a good choice and shouldn't pose any serious re-soldering problems although you're supposed to only crimp then there's be no need to resolder in the first place .



Silicon grease would be the worst, imo, as it can have a high melting point. Everything else in between. I haven't done an awful lot of soldering on oil coated wires, but anything hands down would have to be better than trying to solder corroded copper strands.
Presumably silicone grease.
I can't comment on soldering though silicone grease but is very easy to crimp stuff previously coated in silicone grease (like say DC4) as it is a low pressure grease so readily displaces when crimped.

Soldering corroded copper wire can be achieved by fanning out the strands and treating with a mild acid - phosphoric, citric etc. Wipe with a scotchbrite scourer, flush with water and then solder with normal electrical solder.
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Old 05-07-2019, 05:23   #9
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Re: Protective film for electrical connections

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Presumably silicone grease.

I can't comment on soldering though silicone grease but is very easy to crimp stuff previously coated in silicone grease (like say DC4) as it is a low pressure grease so readily displaces when crimped.



Soldering corroded copper wire can be achieved by fanning out the strands and treating with a mild acid - phosphoric, citric etc. Wipe with a scotchbrite scourer, flush with water and then solder with normal electrical solder.
Boy talk about over the top! Cut the damn bad wire to clean and get on with it.
After my 2 Trans-ATS, I've become quite the nut job about never making any connection without sticking the wire in my can of lanolin, or dielectric grease or spraying a protective film...
I bust out laughing when I saw the "OMG, can of worms" comment on solder....made me giggle silly.
All I can comment on is experience at sea. Corrosion is real no matter how you slice it, so yes prophylactic prevention is really smart at staving off this bugger of hassles down the road.
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Old 05-07-2019, 05:44   #10
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Re: Protective film for electrical connections

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Originally Posted by svMarite View Post
Boy talk about over the top! Cut the damn bad wire to clean and get on with it.
.......

Yeah, cutting back to clean wire works great when you can do it.
When you can't - my way works
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Old 05-07-2019, 05:56   #11
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Re: Protective film for electrical connections

CRC Soft Seal; sprays on as a thin runny liquid which will wick up wires, and coat everything, dries to a flexible waxy non sticky stuff, cleans off with any petroleum type solvent.
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Old 05-07-2019, 10:10   #12
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Re: Protective film for electrical connections

Personally I avoid all things siliicone -the silicone oil residue is virtually impossible to remove and makes it very difficult for anything else to adhere. 3M Silicone Dielectric grease is specifically made for this purpose, but not on my boat...

I soldered connections where appropriate (let's not start that food fight) and coated with liquid vinyl (Liquid Lectric Tape) when I built Carina. I also wrapped each wire with electrician's tape after the vinyl set up - a mistake. Electrician's vinyl tape (the good 3M stuff) doesn't last for decades: the adhesive turns into a gooey mess. I like repair tape better these days. It is not too difficult to remove the liquid vinyl if needed (not terribly easy though).

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Old 05-07-2019, 10:14   #13
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Protective film for electrical connections

If you are talking circuit boards. Then you need conformal coat.
Very often conformal coating is the only difference between a marine product and a non marine one, it’s easy to conformal coat a board, it’s just painting it on.
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Old 05-07-2019, 10:26   #14
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Re: Protective film for electrical connections

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Originally Posted by a64pilot View Post
If you are talking circuit boards. Then you need conformal coat.
Very often conformal costing is the only difference between a marine product and a non marine one, it’s easy to conformal coat a board, it’s just painting it on.
Conformal coating is the worst. It may protect a circuit board but if you need to replace a component, first you have to scrap that crap off. I used to hate dealing with it
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Old 05-07-2019, 10:29   #15
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Re: Protective film for electrical connections

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Originally Posted by a64pilot View Post
If you are talking circuit boards. Then you need conformal coat.
Very often conformal costing is the only difference between a marine product and a non marine one, it’s easy to conformal coat a board, it’s just painting it on.
Conformal coating is the worst.

It may protect a circuit board but if you need to replace a component, first you have to scrap that crap off. I used to hate dealing with it
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