What exactly is this on the + bus terminal? Silicone?

[CB_ROC12]

My 1097A2 has this on the + bus terminal. Looks like silicone? Anyone know the exact type? Picture attached.

 

[juanprado]

I believe the military uses dow corning 738 waterproofing electrical silicone sealer

 

[Wildland]

I just bought an 03' M997A2 and it has various types of clear and white silicon caulking on what I'd call critical electrical-mechanical junctions like the alternator wiring nuts, battery, etc. I also have an 07 1097R1 and it doesn't have any. I am guessing one saw in-theater action and one did not!

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[juanprado]

Marine vehichles because of fording tend to get gooped up more at a field level than other services is my swag

 

[Mogman]

Unless you are going fording (which you should NOT) just remove it and clean up the connections just like every other vehicle on the planet.

 

[spankybear]

Unless you are going fording (which you should NOT) just remove it and clean up the connections just like every other vehicle on the planet.

This... Mine had corrosion under the sealer on the ground lug... If I where to do fording I would use dialectic grease instead of RTV... YMMV...

 

[Retiredwarhorses]

You would be well advised to keep the Silicone on the lug connections, there is a lot of amps running through them and having them exposed where something metal could possibly come in contact with them would create quite a mess.
3-5 times a week I remove the Slave connector power lead on this power strip for trucks trucks here in the shop, I’ve never once in hundreds of trucks found corrosion on the lugs, that tell me the silicone is doing it’s job, when I’m done, I seal it back up

 

[cwc]

If you are concerned the connection is poor under the silicone, then check for voltage drop while cranking. For example, on the positive connection, connect a meter between the positive cable at the battery post and the inside of the passthrough connector or at the starter positive terminal.


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[Gcelevator]

You would be well advised to keep the Silicone on the lug connections, there is a lot of amps running through them and having them exposed where something metal could possibly come in contact with them would create quite a mess.
3-5 times a week I remove the Slave connector power lead on this power strip for trucks trucks here in the shop, I’ve never once in hundreds of trucks found corrosion on the lugs, that tell me the silicone is doing it’s job, when I’m done, I seal it back up

Steve, is there any dpecific RTV, silicone or sealant to be used pr recommended for this?

 

[Retiredwarhorses]

Steve, is there any dpecific RTV, silicone or sealant to be used pr recommended for this?

i just use a clear silicone

 

[87cr250r]

If you want RTV use Dow Corning 734.

If you want grease use Dow Corning 111

If you want upgraded grease use Ulta Safety Systems Ultra Tef-Gel.

 

[spankybear]

If you want RTV use Dow Corning 734.

If you want grease use Dow Corning 111

If you want upgraded grease use Ulta Safety Systems Ultra Tef-Gel.

Not all RTV is the same. Some is corrosive ... Can't go wrong with Dow Corning .

Can't argue with Dow Corning's grease but I use super lube as it is easier to find. I use supper lube on all packard connectors that I take apart. Will not harm the rubber and makes them slide in easier. Plus adds some waterproofing.

Synthetic Grease - Multi-Purpose Lubricant | Super-Lube

Heavy-duty, multi-purpose lubricant synthetic grease with Syncolon® (PTFE) to form a premium lubricant that provides longer life protection against friction, wear, rust and corrosion.

www.super-lube.com

 

[juanprado]

Read the description for 738.
I have picked some surplus boxed with nsn and part number.
Pretty sure that is what is in the system and has a mil spec

 

[87cr250r]

I like the 734 because it's low viscosity and flows to cover the connection more neatly.

 

[spankybear]

Read the description for 738.
I have picked some surplus boxed with nsn and part number.
Pretty sure that is what is in the system and has a mil spec

A lot of Dow Corning has Mil spec stuff... 738 is white from what I have read... I would take a guess and think they would use 732 on the terminals. It's " multi purpose". Dow makes good stuff so any would work...

DOWSIL™ 732 Multi-Purpose Sealant

General-purpose acetoxy RTV sealant. Meets the requirements of 21 CFR Section 177.2600: "Rubber articles intended for repeated use".

www.dow.com

DOWSIL™ 734 Flowable Sealant

A 1 part solventless silicone elastomer for general sealing and bonding applications. 734 is a flowable liquid that is easy to use and cures on exposure to moisture in the air. Available in clear or in white.

www.dow.com

DOWSIL™ 738 Electrical Sealant

1-part, white, non-flowing moisture cure adhesive, Durable general purpose sealant/adhesive for a wide variety of bonding and sealing applications. Mil spec is required.

www.dow.com

 

[spankybear]

I like the 734 because it's low viscosity and flows to cover the connection more neatly.

Also less chance of voids to catch water. Like I said there was corrosion under mine and was causing issues.

 

[Milcommoguy]

Voice from the back of the club house... It's a HumV not a bathtub or submarine.

First thing I did ...cleaned all that crap off for a visual and clean electrical bare connections, Through OUT the HumV. That never been done before? Something I can see and work with.

Under the glopped on sealant, any sign of corrosion, in my world, can not be address. A simple brushed on / spray clear lacquer or better Glyptal (the red stuff seen on motor windings) allowing quick inspection and rework if necessary.

Plus it's a mess, stinks, never looks good, even after poking, smearing, redressing, and always missing a spot or two, except skin and clothes LOL. That one picture looks like it flowed out of a Cheez Whiz can. If looking to build a rubber bumper it worked. Better IMO, place a thin fiberglass board over the HOT stuff on stand-off's or simple bracket.

OK ok .... I will sit down now. CAMO

SMELLS GOOD Tastes OK. Will clogg up your pipes

 

[87cr250r]

Try the 734...