I pulled this off the web:

CRC Marine degreaser is designed to protect electrical equipment and engines from dirt, grease, oil, and other contaminants by dissolving them without leaving residue behind. US Coast Guard approved, CRC marine cleaner/degreaser is non-flammable and non corrosive.
CRC Heavy Duty Corrosion Inhibitor, once applied, forms a corrosion-proof film that remains flexible, won't crack, seals out corrosive salt air and moisture. A coating of corrosion inhibitor provides long term protection even in challenging marine weather, and can be removed with most petroleum based solvents or with CRC's own degreaser.

NAME CAS RN %
solvent naphtha, medium aliphatic 64742-88-7 10-30
methylene chloride 75-09-2 10-30
oxygenated hydrocarbon 10-30
2-methylpentane 107-83-5 5-15
n-hexane 110-54-3 1-10
metal alkyl aryl sulfonate 1-10
hydrocarbon propellant 68476-85-7. 20-40

Other than these two:
oxygenated hydrocarbon 10-30
metal alkyl aryl sulfonate 1-10
the rest appear to be solvents or propellants. One of those two must be providing the protection.

This -- methylene chloride -- is very bad stuff. Don't breathe it and don't get it on your skin.

Tectyl arrived today.

I just received two cases (8, 1-gallon cans) of Tectyl 846,
the US equivalent of what the Porsche Factory uses on
current 911s. They are packed 4 cans to the case and
are shippable UPS ground. This product also comes in
11 oz (312.4 g) aerosol cans. I’m impressed with the
substantial case packaging. Additionally the cans are
double sealed and then in a sealed plastic bag.

The retail cost for 1-gal is US$65 FOB Los Angeles, CA.
Hopefully Wayne’s buyers and our buying power can
reduce that. (For reference it was $30.94 UPS ground
from LA to Denver for two cases.)

The retail cost for the 11 oz aerosol can is $14.25. I
suspect it would take almost two cans to coat a mag
case 915. While this is convenient, a 1-gal can and a
paint brush is a better deal. The aerosol probably also
has environmentally bad things. I’ll speculate a gallon
container will coat 10-20 transmissions or 3-4 under-car
sprays.

This product is used by the military and industry in
HUGE quantity to preserve machinery during
storage, shipment and use. Porsche sprays it under
every new vehicle. They have used various formulations
for almost 40 years. My ’68 911 still has some.

This is a product that can dramatically extend the life of
our 911s if used properly.

This stuff should not get on any of the exhaust components.
There are different issues and products there.

Randy, you will be pleased to know that there isn’t any
methylene chloride listed. It is 30-40% Stoddard solvent
(Aliphatic hydrocarbons – 8052-41-3), the volatile carrier.
The wax preservative (60-70%) is “Calcium salt of
oxidized petrolatum – 68425-34-3.”

The best news is that it is easy to remove with solvent.
Parts can look like new 20 years later if this is done
properly.

Here I sprayed some on a not-very-clean 901 transmission.
I masked off to the left so the application shows up well.
The application should be done 3-5 times and allowed to
dry in between.
http://forums.pelicanparts.com/uploa...1140477180.jpg


http://forums.pelicanparts.com/uploa...1140477310.jpg

http://forums.pelicanparts.com/uploa...1140477409.jpg


The label reads:

Military Specification
Mil-PRF-16173E Grade 4 Class 1
Military TYPE P-19 PRESERVITIVE QPL
Tectyl 846
CORROSION PREVENTION COMPOUND
FIRM WAX TRANSPARENT
1900 5% ASTM B-117
SALT SPRAY HOURS PROTECTION
HEAVT DUTY
AMBR RUST PREVENTAYIVE
INDUSTRIAL WAX COATING

Porsche used to refer to Tectyl as a “one season undercoat.”
If done properly it provides protection for many years. This
is particularly true when combined with other strategies. At
a parade concourse d’elegance, I would add points for a
street/preservation class car.

Everyone should use this product (or something simular)
to protect your 911 from corrosion - even in LA it will
protect from stmospheric corrosion. I suspect there is a
reason that PAG has used this for 40 years. I started in
the late '60s. Why so few others? In the early '70s I
gave Chuck S. a can and he used it.


Now we need Wayne’s buyer to organize this. I think this is
one more great product PP can supply. No one else is doing it.

Best,
Grady

Thank you, Grady. I had wondered how to go about reproducing the preservative for years. I will be using this as soon as I can get hold of some.

Great work Grady!

From your estimate, it sounds like each person (tranny) needs a pint or less...

Brushing it is also likely to give a thicker coat and better penetration than a spray.

Randy,

One gallon = 3,785 ml is about right. A liter or less for the transmission, 250 ml for the underside of the crankcase, valve covers, etc, 250 ml for the rear trailing arms, 2000 ml for everything else and have 288+ ml left over for touch-up maintenance.

We should think of this as wax for the underside - which it is. We can have perfectly clean, painted, plated, etc. parts underside and then protect them to preserve that condition. When we want/need to service things; a quick cleaning with solvent gets everything looking like new.

We wax our beautiful exterior paint. Why not the underside? This may not be as shiny but the beauty is within – preserved.

Best,
Grady

Grady, your dedication to the preservation of the 911 is amazing.

Back in my USAF machinist days, we used to coat some of the mag pieces with something similar to what you have purchased. I recall painting the aluminum stuff with zinc chromate primer. Many of our aircraft (especially naval) have serious corrosion problems due to the nature of use, and exposure to "salt air". I also recall everything was covered in cosmoline when we got it. I shudder to think of my exposure to the cleaning agents, like toluene and methyl ethyl ketone, et al.

Pat-
Zinc chromate, toluene, ketone, Stoddard solvent.
All names from my "prop-shop" days, also. No wonder I can't remember what day it is!

Aah yes, good ‘ol MEK and 1,1,1, tri-chrolo-ethelene. I can still smell it. I wonder why I have all these cancers?

Best,
Grady

Alright Grady, is this going to be available thru PP, or are you selling off some of your stash?

MEK is bad, methylene chloride is not really as bad as Randywebb's source suggests. It is relatively inert physiologically compared to chloroform (3 chlorines instead of 2, 1 carbon and remaining hydrogen to make 4 bonds to the carbon) and more toxic carbon tetrachloride (use to be used as brake cleaners and fire extinguishers). I use methylene chloride routinely as an industrial solvent (it's just on the banned list by environmentalists for contributing to ozone depletion). Chlorine in those people's mind have been given a bad rep and doesn't deserve to be generalized into obscurity.
Tectyl is just a heavy wax and as such is perfect for the application of sealing metals from water and salts. Grady has the right idea for preservation.

That's the stuff the hobby shops sold us for "gassing" moths and butterflies for collections.
It's a wonder any of us lived to be a day over 25!

Grady- Nice work tracking down the Tectyl. I'll be in for some of that in a month or two. Hope Wayne is able to do something with it.

Exactly. "not as bad as chloroform ... and more toxic than carbon tetrachloride"

Now c'mon -- did I make it out to be worse than it is?

Yes, chlorinated and brominated HC's deplete the ozone layer... but if you are careless with MEK, you won't be around long enuff to die of skin cancer...

Randy, you misread my post. I said methylene chloride is less toxic than chloroform which is less toxic than carbon tetrachloride. Not as you stated "more THAN carbon tetrachloride."

"It is relatively inert physiologically compared to chloroform (3 chlorines instead of 2, 1 carbon and remaining hydrogen to make 4 bonds to the carbon) and more toxic carbon tetrachloride".

Also the phobia against MEK may be confused with MVK (methyl vinyl ketone which is a Michael acceptor and really screws up one's enzymes and proteins and is highly toxic to animals and humans.)

If the politicians and radical environmentalists have their way (and they already do-look at the crappy gas you western states have to run your HP cars with) we'd all be peddling bicycles to work (and that will still not cut down on carbon dioxide emissions (the more excercise the harder we expell CO2).

Just enjoy while you still can. In 20 years time many of us will be dead from old age and disease and probably run out of gas for the Porsches which are still in top rust free condition .

"radical environmentalists" -- OK, I think I see where this is coming from...

"we'd all be peddling bicycles to work (and that will still not cut down on carbon dioxide emissions (the more excercise the harder we expell CO2)"
-- a ridiculous assertion. A motor engine outputs orders of magnitude more CO2 even divided by 4 passengers, than does a bicyclist.

Rather than argue, I simply reccommend everyone who plans to work with MEK to get the MSDS sheet and read it carefully -- add a safety factor if you wish for [1] synergysitc interactions with other chemicals; [2] your reproductive status; and [3] the lack of chronic tests (only acute testing is done for most chemicals).

Back to the Tectyl...
- I plan to only treat the Mg stuff, not my valve covers or engine case (both Al and doing fine in our relatively unpolluted Orygun rain). So, I'd be interested in pint or Qt. sizes. I bet a few of us here in town could split the cost for a gallon.

I'd be interested in splitting a case of Tectyl 846 1-gallon cans with some Boston area Pelicanheads. Anyone interested in going in on a case? If so, please PM me.

Randywebb,

I'm only being facetious with my comments on global warming and CO2 emissions. I realize the general Pelicanite is not a chemist or MD but there are a lot of overblown and incorrect warnings being cited in postings on cleansers and preservatives. For your info, MEK according to the Merck index has an LD50 of 6.86mL/kg in mice versus 35 mg/kg for MVK (20000 times more toxic and a carcinogen widely used for plastic products). The bad symptons of MEK exposure includes irritation to eyes and throat, dizziness, and vomitting (and exposure will have to be spilling about 400 mL to be toxic to an adult human of about 70kg based on mice data quoted). But on the other hand your advice about reading the MSDS on any chemicals used is perfectly correct. I think the best solvent for cleaning car parts is mineral spirits (hydrocarbon of between 6-8 carbons) or orange oil (best smelling, etc.) BUT THERE IS THE FIRE HAZARDS DOWNSIDE!!!

Tectyl 846 is now available from Pelican HERE

It is Pelican part number PEL-TECTYL-GAL, $65 per 1 gal can, can only be shipped UPS ground in Continental US.

Thanks to Wayne and Scott for the effort. This is a product we all should use.

Best,
Grady

Grady, Randy, and others, great post with really hepful suggestions. I have a couple questions.

1. I can clearly see why the factory so liberally sprayed the magnesium cars with the Tectyl (always seems to me they sprayed just about everything in sight). I didn't see this question come up, please excuse if it did, I have noted that aluminum engined cars also get squirted. I have to assume this is to
prevent the same type of corrosion? Obviously, there is such a thing as aluminum oxide, maybe that's why they got sprayed too.

2. I've cleaned up my magnesium case and trans many years ago and it sill looks clean, is the oxidation layer there but just not that visble? The car does not get wet, does this have an affect on the rate of oxidation?

1. 'same type' - yes, sorta.** the corrosion is the more or less the same in all metals, incl. iron -- we live in an oxygen atmosphere,* and oxygen is a fearsome, uh, oxidizer. It goes after all metals - gold and Ti are essentially unaffected. Mg )at least the alloys used a while back) corrodes much more than Al. I saw somewhere that they had figured out the high corrosion rate of Mg was related to something in the alloy recently, and that newre alloys were much better - not sure where I saw that tho.

2. Yes. Al, for example, oxidizes faster than iron and that forms a protective coating. But you can corrode Al with heat and salt spray pretty well. Water will definitely speed up corrosion. A fe years ago, scientists discovered that bacteria were involved in the rusting of iron (think about 'iron poor blood'). Every since I've been paranoid about rust...

Now here's my question: How come there is anything we know of 40 years later that is beter than Tectyl??


* Originally, there was no O2 in the atmosphere. A type of bacteria eventually evolved a new chemical pathway to 'eat' and that liberated oxygen. This had the collateral advantage of killing off all its competitors, causing the first of the major extinction events on Earth. Today, only a very few anaerobic organisms survive, and they are not ones that we like (they infect wounds that aren't left open to the air). No charge for today's bio-tidbit.

** This is the Wheaties version. It's more complicated if you get into the detailed chemistry. I only have an undergrad. degree in chemistry, so I ain't goin' there.