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Old 08-26-2014, 08:09 AM   #1
Join Date: Aug 2013
Location: New Hampshire
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Propane tank

We have a 2005 Fleetwood Bounder 33R with a 25 gallon propane tank The original tank rusted out and has just been replaced. I would like to prevent the new tank from rusting, and the problem is that it sits just behind the right front tire. Debris from the tire sand blasts the bottom of the tank which then rusts. There is a mud flap behind the tire but it doesn't stop everything. The question is, how can I protect the bottom of the propane tank. A couple of possibilities occurred to me: Paint the bottom of the tank with spray-on undercoating. Cover the bottom of the tank with a sheet of rubber that is glued on (don't think this will stay put) or perhaps held with bungy cords. (May be a problem trapping moisture).

Any other ideas?

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Old 08-26-2014, 09:18 AM   #2
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My thought is a can or two of liquid bed liner, brushed on. Two coats.

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Old 08-26-2014, 11:33 AM   #3
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x2! A brush-on bed liner or similar coating material should protect it nicely and be easy to do. Better looking than the undercoating stuff and just as effective, I think.

Here's one brand:
Amazon.com: Herculiner HCL1B8 Brush-on Bed Liner Kit: Automotive
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Old 08-26-2014, 11:40 AM   #4
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The brush on bed liner looks like a good answer. Thanks!!
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Old 08-26-2014, 11:47 AM   #5
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The only requirement for the propane tank area is that it be vented.
So if the spray on bed liner appears to be in trouble, from gravel rash, you can mount a, full length shield under the tank. It just has to allow any propane fumes out and that would allow road grit in so it would require cleaning out when required.
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Old 08-26-2014, 12:18 PM   #6
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Regular cleaning and re-painting with rust control paint will work,, NOTE: do not change the color of the tank,, Stories suggest not good to change color.

As for your sheet of rubber idea... What about Flex Seal Bright,, This is a white,, RUBBER spray on coating. Have not tried it on a propane tank but have used it (2 coats) to protect electrical connections and to fix a short 3" hose So far, impressed. works as advertised.
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Old 08-26-2014, 12:39 PM   #7
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Thanks for the replies. I have considered a shield but attachments would be something of a problem. I may ultimately have to go that way. This is a $600+ tank and I'm not buying another one. As for changing the color, I would imagine that if the tank was exposed to the sun and the color was dark, that could be a problem. This tank is completely protected from the sun and in an open bottom compartment. Plus, only about 15 or 20 per cent of the surface would be painted. Maybe after I put the bed liner material on - if that's the route that I go - I will paint the black bed liner white. Really don't care much about the cosmetics.
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Old 08-26-2014, 12:55 PM   #8
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I would be concerned about using anything that moisture might be able to get behind at the edges if you don't coat the whole tank. I'd probably lean toward regular maintenance cleaning and repainting as needed fall and spring a few minuets with some sandpaper and a can of spray paint should do it.
Whatever way you go it will need to be checked periodically. Anything that is soft will be almost impossible to remove if necessary.
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Old 08-27-2014, 10:35 AM   #9
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Personally I think a 5.00 can of rustoleum spray paint the proper color applied every few months when you see a problem would be the cheapest, easiest, Safest solution.
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Old 08-27-2014, 11:53 AM   #10
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An occasional quick touch up was my first thought. However when I drove to my house from the RV shop - a distance of about 10 miles - there was already some paint chipping. We travel to and from Florida, so there will likely be a lot of bare metal and I don't want rust to get started. I also don't want to be constantly having to mess with the tank. I think that I will need something more durable and the DIY bed liner looks promising.

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propane, tank

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