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Thread: whats the best sealant for ally tank

  1. 19th December 2012, 07:09 PM #1
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    Exclamation whats the best sealant for ally tank

    have just spent hours installing the water tank that was in my 110 into my camper trailer.......

    connect the hose to it and all was going well until it sprung a leak.....silly me didn't open the breather, in saying that it was only garden hose pressure

    one of the welds on top of the tank has a small split

    i'm going away for a week in two days and there is no way i am pulling this tank out to have it welded up

    what would be the best sealant to run along this seam?

    silastic or sikaflex or something else
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  2. 19th December 2012, 07:23 PM #2
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    Are you planning on having it welded at a later date?

    If so, that might affect your choice of sealant. I don't know how silastic would affect a weld, but it creates problems for a lot of other things.

    JB-Weld is supposed to be pretty strong. Maybe it would make a permanent repair.

    http://www.jaycar.com.au/productView.asp?ID=NA1518
    Last edited by vnx205; 19th December 2012 at 07:23 PM. Reason: Added link

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  3. 19th December 2012, 07:48 PM #3
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    Quote Originally Posted by vnx205 View Post
    Are you planning on having it welded at a later date?

    If so, that might affect your choice of sealant. I don't know how silastic would affect a weld, but it creates problems for a lot of other things.

    JB-Weld is supposed to be pretty strong. Maybe it would make a permanent repair.

    http://www.jaycar.com.au/productView.asp?ID=NA1518
    You have just switched my light bulb on.....I have used needit years ago one the alloy fuel tank on my chainsaw
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  4. 19th December 2012, 07:56 PM #4
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    I would expect anything that can cope with the vibration associated with chainsaws would probably survive on the camper trailer.

    1973 Series III LWB 1983 - 2006
    1998 300 Tdi Defender Trayback 2006 - often fitted with a Trayon slide-on camper.
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  5. 19th December 2012, 08:59 PM #5
    Hoges
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    Are you using the tank water for drinking or just washing up /showers etc?
    If it's for drinking purposes I'd suggest you use the 2-part blue/white epoxy ribbon putty. Once it's set it's effectively a permanent fix. Let cure for 24 hrs then fill the tank again. cheers
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  6. 19th December 2012, 09:26 PM #6
    Tombie Guest
    I'd be worried more about the seam splitting further!
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  7. 19th December 2012, 09:30 PM #7
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    Quote Originally Posted by Tombie View Post
    I'd be worried more about the seam splitting further!
    This is the second split.....if it splits more than I'm not overly fuss as I have another 100L at the camp site and we only an hour from civilization .....the tanks been bumping around aus for the last eight years with kids jumping on it so its done pretty well

    Might start designing a poly tank
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  8. 19th December 2012, 10:38 PM #8
    reschook
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    Aluminium devcon would work but dont know wether approved for food grade applications. may contaminate weld area for future repair.used to use it in aircraft galleys etc.
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  9. 19th December 2012, 10:58 PM #9
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    Quote Originally Posted by reschook View Post
    Aluminium devcon would work but dont know wether approved for food grade applications. may contaminate weld area for future repair.used to use it in aircraft galleys etc.
    X2 Use Devcon and you will never have to weld the tank.

    Erich
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  10. 20th December 2012, 08:17 AM #10
    crash
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    Would it be wise to drill a small hole at the ends of the split first to prevent further splitting?
    Aqua need is another brand and is designed for use in water situations.
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