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Posted by Bill Schwab on January 30, 2008, 3:08 pm
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Hello all,
I am building a frame/box onto a metal cart - long story. The chase is
that it needs to be water resistant, and there will be a couple of butt
joints that would benefit from a gasket of some type. Whatever I use
needs to be non-porous.
RTV sealant strikes me as a reasonable choice (perhaps I'm having too
much fun tinkering my truck<g>). Any concerns about using it on Enco's
extruded Al tubing? Some quick searches suggest avoiding acetic acid.
Any other concerns?
Any better ideas? Again, porous materials will be a problem.
Thanks,
Bill
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Posted by pdrahn@coinet.com on January 30, 2008, 4:49 pm
Please log in for more thread options > Hello all,
>
> I am building a frame/box onto a metal cart - long story. The chase is
> that it needs to be water resistant, and there will be a couple of butt
> joints that would benefit from a gasket of some type. Whatever I use
> needs to be non-porous.
>
> RTV sealant strikes me as a reasonable choice (perhaps I'm having too
> much fun tinkering my truck<g>). Any concerns about using it on Enco's
> extruded Al tubing? Some quick searches suggest avoiding acetic acid.
> Any other concerns?
>
> Any better ideas? Again, porous materials will be a problem.
>
> Thanks,
>
> Bill
If you want to use RTV, but don't want acetic acid, find some
electronic assembly grade RTV.
Paul
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Posted by Richard J Kinch on January 30, 2008, 6:22 pm
Please log in for more thread options Bill Schwab writes:
> Any better ideas?
3M 5200 marine polyurethane. Stands up to constant immersion. Very
strongly adhesive.
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Posted by Bill Schwab on January 30, 2008, 7:07 pm
Please log in for more thread options Richard J Kinch wrote:
> Bill Schwab writes:
>
>> Any better ideas?
>
> 3M 5200 marine polyurethane. Stands up to constant immersion. Very
> strongly adhesive.
Interesting. It might be too much of a good thing, but I will consider it.
Thanks!
Bill
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Posted by Ian Malcolm on January 31, 2008, 5:07 am
Please log in for more thread options Bill Schwab wrote:
> Richard J Kinch wrote:
>
>> Bill Schwab writes:
>>
>>> Any better ideas?
>>
>>
>> 3M 5200 marine polyurethane. Stands up to constant immersion. Very
>> strongly adhesive.
>
>
> Interesting. It might be too much of a good thing, but I will consider it.
>
*dont* consider it for any joint you might want to dissasemble
non-destructively. If you get any on your skin, you'll have its stains
with you far about a month. You can also forget about getting it off
any soft or poreous surface that its got onto. Its also got a *very*
short shelf life once opened. 3M 4200 is somewhat less drastic and
Sikaflex do a range of marine sealants, one or more of which should suit
your purpose.
IIRC your cart is all or part Alumuinium and you are concerned about
corrosion. You may wish to google "poultice corrosion". In any wet
(non-potable water) application if I have Aluminium faying surfaces
without a specific gasket, I use Duralac (an inhibiting Barium
Bichromate goop), ESPECIALLY IF DISSIMILAR METALS ARE INVOLVED.
--
Ian Malcolm. London, ENGLAND. (NEWSGROUP REPLY PREFERRED)
ianm[at]the[dash]malcolms[dot]freeserve[dot]co[dot]uk
[at]=@, [dash]=- & [dot]=. *Warning* HTML & >32K emails --> NUL:
'Stingo' Albacore #1554 - 15' Early 60's, Uffa Fox designed,
All varnished hot moulded wooden racing dinghy.
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>
> I am building a frame/box onto a metal cart - long story. The chase is
> that it needs to be water resistant, and there will be a couple of butt
> joints that would benefit from a gasket of some type. Whatever I use
> needs to be non-porous.
>
> RTV sealant strikes me as a reasonable choice (perhaps I'm having too
> much fun tinkering my truck<g>). Any concerns about using it on Enco's
> extruded Al tubing? Some quick searches suggest avoiding acetic acid.
> Any other concerns?
>
> Any better ideas? Again, porous materials will be a problem.
>
> Thanks,
>
> Bill