Sheet steel tender tank sealant

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Bill Shields
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Re: Sheet steel tender tank sealant

Post by Bill Shields »

Tried that gas tank sealant stuff and it does not hold a candle to Devcon.

Called PQR or something and it peels right off...at least the one part pour it in and air dry version
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RThomp
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Re: Sheet steel tender tank sealant

Post by RThomp »

a welded stainless tank inside the visible "tender tank" would be a lifetime solution as well. It could be removable as well, with bulkhead style fitting on the bottom. You would literally never have to mess with it.
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Steggy
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Re: Sheet steel tender tank sealant

Post by Steggy »

RThomp wrote: Tue Feb 21, 2023 3:34 pma welded stainless tank inside the visible "tender tank" would be a lifetime solution as well.
Not necessarily.

Depending on the chosen alloy, a stainless weld may be susceptible to the formation of chromium carbide in the fusion zone as the metal passes through the transformation temperature range. The resulting joint will not have the corrosion resistance of the base steel. This is true no matter the process used to fabricate the weldment.

If corrosion-resistance of a welded, stainless steel container is mandatory, one of the very-low-carbon alloys should be used. My choice for this application would be 304L (UNS 30403). The mating fittings should also be 304L.

The welding procedure itself should endeavor to minimize time in the transformation range. In other words, use enough current to weld as quickly as possible—time is more critical than absolute temperature.
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michaellynn2
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Re: Sheet steel tender tank sealant

Post by michaellynn2 »

I am with hoppercar about using brass for the tender tank. Yes it was expensive but it has lasted so far 45 years and going strong. I even built a car to carry water (canteen) out of brass.


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Bill Shields
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Re: Sheet steel tender tank sealant

Post by Bill Shields »

:mrgreen: very nice
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Sandiapaul
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Re: Sheet steel tender tank sealant

Post by Sandiapaul »

Bill, do you use the putty or liquid version of the Devcon? Your pics look like the putty...but I don't know how thick the "liquid" is
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Bill Shields
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Re: Sheet steel tender tank sealant

Post by Bill Shields »

Will photos can. It is brushsble for about 10 minutes

Process idms important

Grit blast
Ptimer 1
Primer 1 again
Primer 2
Devcon

Mix in a small plastic cup with Popsicle stick using exace property weight . I have plastic shot glass looking things

Spread around with small cheap paint brush (1/2)" wide or strong acid brush. You will lose bristles from the brush. Not to worry, pick them out later

You have maybe 10 minutes to work with the brush Each batch throws away brush and cup.

Cannot do everything at once because most will set up before brushed .. so small batches .

Turns tacky to touch in 30 minutes .

Repeat until all done. You can mix and work one batch right after the other. ok to have fresh brush on area joining a previous solid since it is not air dry. Ok to sit hours or days between work zones it vou get tired.

Let dry a day or two before putting water in tank to look for leaks


It you find a leak, matk it on outside. Mix up a batch and dab it on with a brush on the inside . Not to worry, flexane sticks like crazy to itself.

If you get it on where you do not want it, razor blade required to cut it off

Plug holes with screws. Masking tape works also, just be prepared to use a razor knife to define edges where tape stops and you want devcon remain.

Experiment on pieces of scrap.

Strongly suggest you get a small digital food scale to measure the ounces needed to mix. I tried by eyeballing volume and it is tough. Pouring by weight is about the best way to go. You gotta get the proportions correct or it never sets up or sets up so fast you cannot brush it.
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pat1027
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Re: Sheet steel tender tank sealant

Post by pat1027 »

milwiron wrote: Mon Feb 20, 2023 3:13 pm ...possibly galvanized.
Take a look at galvanneal. You get the protection of galvanized with a surface that takes paint well. I have a tender 30+ years old made from galvanneal. The seams were riveted and soft soldered. The sheared edges inside the tank need protection. They are covered with a two part epoxy product.
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dnevil
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Re: Sheet steel tender tank sealant

Post by dnevil »

You might consider using "Red-Kote" fuel tank liner. See this article

http://ibls.org/mediawiki/index.php?tit ... w_Oil_Tank
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SF2900
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Re: Sheet steel tender tank sealant

Post by SF2900 »

Might want to consider GacoFLex LM60. It is also a 2-part urethane product that looks to be similar to the Devcon material. LM60 is designed to coat/waterproof tanks and structures and comes in a horizontal and vertical viscosities. https://gaco.com/product/gacoflex-lm60/
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Greg_Lewis
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Re: Sheet steel tender tank sealant

Post by Greg_Lewis »

Another thought is to make a plastic insert tank. The plastic can be cut on a table saw and glued together. Can be drilled and tapped as needed. Easy. Just drop it into whatever metal tank you want for the outside. Painless. Won't rot, rust or peel.
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Re: Sheet steel tender tank sealant

Post by Odyknuck »

SF2900, The GacoFLex LM60 appears to be more for wood and concrete. Have you actually used it in a tender?
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