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Problems With Rustproofing Gun. #4539261
10/10/17 03:41 PM
10/10/17 03:41 PM
Joined: May 2005
Posts: 2,201
Toronto, Canada
George7941 Offline OP
George7941  Offline OP
Joined: May 2005
Posts: 2,201
Toronto, Canada


I have used this gun for a couple of years with thin undercoating oil and have had no issues. Yesterday I tried spraying dripless undercoating oil which is somewhat thick and had waxy agglomerations in it. This is the place where I bought the oil
http://www.monarchoil.com/products.php?cat=11
The product is WSUNDDRI

It was 20C/70F ambient yesterday and the oil would just not come out of the gun. I turned the pressure up to 70 psi (did not want to go higher since I did not relish the thought of a oil bath) and the oil still would not flow.

I am thinking of buying a Schutz gun at Canadian Tire
http://www.canadiantire.ca/en/pdp/schutz-siphon-gun-0475761p.html
Will it spray the dripless oil?


2006 GMC Sierra 4.3l, NV3500,G80 , Mobil 1 5W30, Dexcool.
1987 BMW R80 - sold
2015 Honda CBR300R

Staying out of the right lane a lot.
Re: Problems With Rustproofing Gun. [Re: George7941] #4539269
10/10/17 03:47 PM
10/10/17 03:47 PM
Joined: Dec 2002
Posts: 42,085
New Jersey
JHZR2 Offline
JHZR2  Offline
Joined: Dec 2002
Posts: 42,085
New Jersey
Start with the basics. There's not much to this...

Hose collapsed? That would be my bet.

Clog in outlet or intake?

Some sort of o-ring or seal?

Re: Problems With Rustproofing Gun. [Re: George7941] #4539271
10/10/17 03:48 PM
10/10/17 03:48 PM
Joined: Jul 2005
Posts: 30,429
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 30,429
NY
If the gun is working properly the next step would be did you try thoroughly mixing and thinning the product?


God Bless Our Troops

Re: Problems With Rustproofing Gun. [Re: George7941] #4539277
10/10/17 03:51 PM
10/10/17 03:51 PM
Joined: May 2005
Posts: 2,201
Toronto, Canada
George7941 Offline OP
George7941  Offline OP
Joined: May 2005
Posts: 2,201
Toronto, Canada
None of the above. After realizing that the gun would not spray the thick oil I filled the container with thin oil and had no problem spraying it. With the thick oil air would come out out not the oil.

The thin oil is about the consistency of ATF.


2006 GMC Sierra 4.3l, NV3500,G80 , Mobil 1 5W30, Dexcool.
1987 BMW R80 - sold
2015 Honda CBR300R

Staying out of the right lane a lot.
Re: Problems With Rustproofing Gun. [Re: demarpaint] #4539280
10/10/17 03:54 PM
10/10/17 03:54 PM
Joined: May 2005
Posts: 2,201
Toronto, Canada
George7941 Offline OP
George7941  Offline OP
Joined: May 2005
Posts: 2,201
Toronto, Canada
No, I did not try mixing or thinning the oil. The Schutz guns seem to be able to handle tarry undercoating, so I expect it can handle thick oil.


2006 GMC Sierra 4.3l, NV3500,G80 , Mobil 1 5W30, Dexcool.
1987 BMW R80 - sold
2015 Honda CBR300R

Staying out of the right lane a lot.
Re: Problems With Rustproofing Gun. [Re: demarpaint] #4539281
10/10/17 03:54 PM
10/10/17 03:54 PM
Joined: Nov 2008
Posts: 3,157
Oshawa, Ontario Canada
JC1 Offline
JC1  Offline
Joined: Nov 2008
Posts: 3,157
Oshawa, Ontario Canada
Originally Posted By: demarpaint
Did you try thoroughly mixing and thinning the product?


Try to mix it.

I just sprayed fluid film this weekend and it wouldn't come out of the nozzle at first. Had to adjust the amount of threads attached to the gun nozzle to get the fluid to spray out properly. Maybe try to spray water only first to see if the gun is working.
Also make sure the cannister isn't full of rustproofing to the top. It may need some room for the air to do its thing.

Last edited by JC1; 10/10/17 03:55 PM.

2015 Grand Caravan SXT Plus 5w-20 PPPP/Fram Ultra Filter
1997 Honda Civic CX 5w-30 Shell Conventional/Fram Ultra Filter
Re: Problems With Rustproofing Gun. [Re: George7941] #4539284
10/10/17 03:55 PM
10/10/17 03:55 PM
Joined: Jul 2005
Posts: 30,429
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 30,429
NY
Originally Posted By: George7941
None of the above. After realizing that the gun would not spray the thick oil I filled the container with thin oil and had no problem spraying it. With the thick oil air would come out out not the oil.


Try thinning the product to get it to properly atomize. The thinner will flash off and the product will remain and protect the surface. I had the same problem with a different gun, my buddy reminded me to thin the product. I was hoping it would spray as it came out of the pail, that wasn't the case.


God Bless Our Troops

Re: Problems With Rustproofing Gun. [Re: demarpaint] #4539294
10/10/17 04:01 PM
10/10/17 04:01 PM
Joined: May 2005
Posts: 2,201
Toronto, Canada
George7941 Offline OP
George7941  Offline OP
Joined: May 2005
Posts: 2,201
Toronto, Canada
Would diesel fuel be a good thinner?


2006 GMC Sierra 4.3l, NV3500,G80 , Mobil 1 5W30, Dexcool.
1987 BMW R80 - sold
2015 Honda CBR300R

Staying out of the right lane a lot.
Re: Problems With Rustproofing Gun. [Re: George7941] #4539318
10/10/17 04:14 PM
10/10/17 04:14 PM
Joined: Jun 2003
Posts: 33,077
ME
eljefino Online content
eljefino  Online Content
Joined: Jun 2003
Posts: 33,077
ME
Originally Posted By: George7941
Would diesel fuel be a good thinner?


no b/c it would stick around. Mineral spirits would flash off, leaving your original undercoating at its sticky tacky viscosity.

Re: Problems With Rustproofing Gun. [Re: George7941] #4539429
10/10/17 06:17 PM
10/10/17 06:17 PM
Joined: Oct 2012
Posts: 4,608
Taiwan
Ducked Online content
Ducked  Online Content
Joined: Oct 2012
Posts: 4,608
Taiwan
I'd try pre-heating the goo in a double boiler, and then either putting the blue cannister thing in a bucket of very hot water from time to time, and/or insulating it, perhaps with one or more of those silvery plastic coffee bean bags, because i have some.

One of the reasons I dont like the UK product Waxoyl. Clog City Central. A windmill in old Amsterdam.

Last edited by Ducked; 10/10/17 06:29 PM.
Re: Problems With Rustproofing Gun. [Re: George7941] #4539448
10/10/17 06:36 PM
10/10/17 06:36 PM
Joined: Oct 2012
Posts: 4,608
Taiwan
Ducked Online content
Ducked  Online Content
Joined: Oct 2012
Posts: 4,608
Taiwan
(If you thin it with white spirit as well, which was the Waxoyl recommendation and not very effective on its own, you of course have to be a bit careful with the naked flame thing when heating.)

Re: Problems With Rustproofing Gun. [Re: George7941] #4539508
10/10/17 07:43 PM
10/10/17 07:43 PM
Joined: Dec 2006
Posts: 7,650
Toronto, Canada
KrisZ Offline
KrisZ  Offline
Joined: Dec 2006
Posts: 7,650
Toronto, Canada
I believe you need to change the attachment for the thicker stuff, or simply remove the one in the picture. That hose is most likely too thin. From the picture it looks like you can unscrew it and you will be left with a wide nozzle. I bet it will spray fine out of that. However you can probably use it for undercarriage like that, for cavities, where the hose attachment has to be used, I would switch to a thinner product.

For thinning the existing product, WD40 works great, but then it will not last as long in the high wash areas.


2015 Dodge Grand Caravan-27k miles.
2006 Mazda 3-163k miles
Re: Problems With Rustproofing Gun. [Re: eljefino] #4539514
10/10/17 07:50 PM
10/10/17 07:50 PM
Joined: May 2005
Posts: 2,201
Toronto, Canada
George7941 Offline OP
George7941  Offline OP
Joined: May 2005
Posts: 2,201
Toronto, Canada
Too bad about the diesel fuel because I have twenty litres of diesel contaminated with two litres of gasoline that I do not want to burn in a late model diesel engine.

I will try thinning it but I would still like to know if a Schutz gun can handle this oil. I see youtube videos of Schutz guns spraying thick rubberized undercoating and that undercoating appears to be thicker than the dripless undercoating.


2006 GMC Sierra 4.3l, NV3500,G80 , Mobil 1 5W30, Dexcool.
1987 BMW R80 - sold
2015 Honda CBR300R

Staying out of the right lane a lot.
Re: Problems With Rustproofing Gun. [Re: George7941] #4539540
10/10/17 08:10 PM
10/10/17 08:10 PM
Joined: Jul 2005
Posts: 30,429
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 30,429
NY
I'd cut it with Mineral Spirits, just enough to get it to work properly.


God Bless Our Troops

Re: Problems With Rustproofing Gun. [Re: George7941] #4539744
10/11/17 12:41 AM
10/11/17 12:41 AM
Joined: Oct 2012
Posts: 4,608
Taiwan
Ducked Online content
Ducked  Online Content
Joined: Oct 2012
Posts: 4,608
Taiwan
Originally Posted By: George7941
Too bad about the diesel fuel because I have twenty litres of diesel contaminated with two litres of gasoline that I do not want to burn in a late model diesel engine.



It'd work, but as suggested above, it'll keep the goop runnier for longer, which might make it more vulnerable to wash off.

OTOH if the goop tends to over-harden with time (like Waxoyl did) it'll delay that. Probably better inside cavities/box sections.

Not sure about the safety aspect of the 10% petrol, though I might chance it.

Last edited by Ducked; 10/11/17 12:43 AM.
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