auto-body question - yellow anti-corrosive gunk

[JHZR2]

hello,

Ive just removed my windows on my 85 MB 300D, because one and its trim had deep scratches. I figured I could get the replacements from my ruined 83, since all its good for is parts. I noted a LOT of rust on the piece that connects the bottom of the glass to the window lift. Also, inside of the door, I see a lot of yellow anti-rust coating. Ive also seen spots slathered with this stuff where repairs have been made, etc.

Does anyone know what the anti-corrosive yellow gunk that OEM and body shops put onto vehicles where work has been done is called, and where one can get it?

Ive seen aerosol corrosion prevntion stuff sold by pennzoil and amsoil, and it is simlar consistency, though, of course, aerosol... I want the professional slop!

Any ideas???

Thanks!

JMH

 

[Anduril]

If the door is all rusted out as you say, then it's pretty obvious that this stuff doesn't work.

 

[JHZR2]

No, the door skins, which are slathered with this stuff inside (both w123 MBs I have are like this, so it isnt some aftermarket stuff) have NO rust, after 22 years. This is a european car, not known for rustproofness...

It is the metal piece that the window sits in (with a rubber piece to hold it tight), which obviously gets wet if water passes by the squeegee, and which is rusty. It shows no signs of being covered with this stuff, unlike the door skins.

Amsoil and pennzoil sell aerosol versions of this stuff. I can see and imagine the utility of the 'real' version of this stuff, as it appears to have protected the inner door quite well compared to the other galvanized pieces. I can see how it would be useful, especially if the stuff in there is 22 years old, and its the first time the doors have been opened since then... wouldnt mind re-freshing this gunk, if I can find out what it is and get my hands on it...

JMH

 

[punisher]

http://3m.hillas.com/pc-15419-1233-3m-08370-ultrapro-msp-seam-sealer-gray-310-ml-flexpack.aspx

It is not yellow, but this is what our body guys used to seal seams on door skins and overlapped joints. It is a paste that is put on like body filler but it always stays flexible.

 

[Duffman77]

I think this is what you are talking about:

http://www.eastwoodco.com/jump.jsp?itemID=1112&itemType=PRODUCT

I think you can get the same stuff elsewhere though. Eastwood Co. is always pricey in my opinion.

 

[Christian_89LSC_96XJR]

http://www.eastwoodco.com/jump.jsp?itemID=1118&itemType=PRODUCT

 

[Syntec-Man]

this is what we use at the old place i used to work at its really expensive but it is really good stuff man!!! highly suggest you pick some up! http://www.sparkleauto.com/r2000.html
i would put a cathode unit on it to prevent rusting that is a awesome car one of the best MB ever made imo

 

[Kestas]

The yellow stuff MB puts on their vehicles is called "cosmoline". It's applied on the vehicles so they won't rust during transatlantic shipping. The stuff is brittle and easily flakes off, thus making it a poor long term rust preventative.

Any rust preventative that turns brittle is no good for corrosion protection. They can trap corrodants and make corrosion worse.

I vote for using Texaco Rustproof Compound L. I have 25 years experience with it on my cars. My 18-year-old winter driver is treated with it since day one when it was new. It needs to be reapplied every 3 years to remain effective. There is no "treated-for-life" compound on the market, despite what advertisement you may read. Check around your local shops for one that uses Texaco Rustproof Compound L. You may want to call a distributor for this compound, who could tell you which local shops use this stuff.

 

[TheLoneRanger]

Zinc chromate primer is yellowish/greenish when it's applied, and might be what's inside the door. Not sure if it's still available, since the EPA might have banned it.....?

 

[JHZR2]

Quote:

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The yellow stuff MB puts on their vehicles is called "cosmoline". It's applied on the vehicles so they won't rust during transatlantic shipping. The stuff is brittle and easily flakes off, thus making it a poor long term rust preventative.

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Ive seen cosmoline, its all over the underhood areas of my 91 BMW. This stuff is purposely sprayed into the door skins and whatnot, and while similar in color, unless MB was cutting way back on budget, is a much thinner, much skimpier, spray, that is not so hard and flaky.

The goopier version seems to be used by auto body shops... its not like the cosmoline on my BMW either...

Ill look out for the texaco stuff. Thanks for the lead!

JMH

 

[ikeepmychevytoo]

Paraffinic wax is widely used by the manufacturers. Usually in the structural areas, in the pillars, roof beams and inside the rocker panels.

Watch for mid section of the B pillars, I saw several MB's of that vintage rusted from there inside to out. After 20 years or so wax simply dries. Industry uses hot wax, but 3M, Würth etc. has the spray can versions, they just have a quick evaporating carrier and solvent.

On window guide channels there might be a silicone based gease, which could be amber or light yellow. They get "smeary" over time. I know from my '84.