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[Jwood]

Ok so here is some testing I did on 3 different corrosion inhibitors. This was completely unbiased I gave them all the same test to the elements water, snow and to speed up the process sprayed them with salt water throughout the day.
1-Transmission fluid
2-Amsoil MP-HD metal protector
3-Fluid Film
I did transmission fluid because I know that's what most people use, I had two cans of the Amsoil product and bought 2 cans of Fluid film because I heard about people using it on snow plows to keep them looking new for many seasons.
Amsoil is right around $8 a can, Fluid Film was 12-13 a can and can also be purchased in a gallon can, 5 gallon and I believe 55 gallon drum and can be sprayed through a gun.
Amsoil goes on and leave an orange wax type of residue but completely dries after time.
The Fluid film is different it goes on clear has no solvents in it and never dries. It is lanolin based and is supposed to leech into every pit crack or  hard to get to area. Next I will post pics before and after.

[Jwood]

Amsoil product before

[Jwood]

Amsoil after

[Jwood]

Fluid Film before

[Jwood]

Fluid Film after

[Jwood]

I didn't do a before on the transmission fluid but we all know what bare steel with transmission fluid looks like and I used a sawzall blade ground clean just like the other steel. So here is after.

[Jwood]

The transmission fluid surprised me with how fast it washed off. Amsoil test piece is pretty obvious where I sprayed and did spray since you can see where I taped it before I sprayed and with the Fluid film I did the same thing. My thoughts are that Amsoil is great if you can make sure and have total coverage but the Fluid Film I think would be a superior corrosion protection for anywhere on a boiler cause as you can see in the pictures it must have leeches to the unprotected metal and even kept that from rusting for the most part. Fluid film can be used as a wax for a vehicle even so you can spray this anywhere on a boiler.

[randy_1]

I am the sales manager at auto dealership here in north central maine we have been selling and promoting fluid film for a few years now. I used it myself on my 07 GmC pickup,kubota tractor and impliments and whatever else around the house I want to  protect against corrosion. This is my first year s a boiler owner and have yet to have warm enough weather to shut it down, but when I do it is my intention to give it a thorough bath in the stuff...

[mlappin]

We handle all kinds of fertilizer, most is more corrosive than salt being its salt based and has other goodies in it.

Whether it be Urea, 10-34-0 or 28% nitrogen Fluid Film hands down is the best thing we've found to fight corrosion.

It is expensive, but since it does work so well in the long run its cheap.

[Crow]

Thanks JWood for taking the time to do this testing.
I have just shut down the BL for the season and was wondering what I would use. Since I have a gallon can of Fluid Film and a spray wand for the compressor it just makes my decision that much easier.

[Jwood]

Hey my pleasure! That would be my choice to, and if there is anyone having corrosion issues anywhere on the outside of the stove I would be all about spraying it down with fluid film. Crow I agreed with everyone to use transmission fluid and only conducted these tests just in case there was something better. I couldnt believe the transmission fluid washed off as fast as it did, (my deck looked like a rainbow ) of course I know there wont be salt water in your fire box but I used that to just accelerate the test.

[Jwood]

One more thing I thought I read crow was something about spraying through a pump sprayer maybe check out thier site and make sure www.fluid-film.com

[Jwood]

http://www.fluid-film.com/faq.html
Says to use an airless paint sprayer for the gallon containers.

[slimjim]

Thats awesome, can it be sprayed with a hand held bottle type sprayer, Thanks Jwood.

[Jwood]

I don't think so probably your typical Wagner paint sprayer though. The website sounded like you need good pressure to get it to atomize but I wouldn't be afraid to try spraying it through a spray bottle, its worth a shot it may be to thick though.