ready to put some boat on my boat

Bruce <brucepaige RemoveThis @gmail.com> schreef in
news:bata93ptiqd2pm77jdpc61rel3bvuucq1g@4ax.com

> On 11 Jul 2007 21:08:43 GMT, Lodewijk Stegman
> <ajeevee-ditweghalen RemoveThis @xs4all.nl> wrote:

>>For instance: wood shrinks and swells with changing humidity. Epoxy
>>won't move with it. How do you engineer that?
>
> Well, I have seen a large number of boats built of wood and epoxy -
> strip planked, cold molded and duracore composite all come to mind.
> These boats are all made of wood and epoxy and seem to have no
> problems with dimensional changes due to moisture content.

You don't have to convince me.

I have seen those boats too. And you and I know why these boats have no
problems with dimensional changes due to moisture content.
The moisture content does not change (enough) to crate problems, once the
wood is sealed from external moisture.
Which seems to prove that epoxy is waterproof enough for this purpose.

Practically spoken, epoxy is waterproof.

--
Lodewijk

On Thu, 12 Jul 2007 12:19:56 GMT, Paul Oman <info RemoveThis @epoxyproducts.com>
wrote:

>
>>Ha! Maybe a chance to get me some free information here =;-}
>>
>>If you were planning on building a composite potable water tank what
>>would you use to line/paint the inside?
>>
>>I have had several boats that had integral tanks. In one case the tank
>>appeared to have been painted inside with polyester resin and a second
>>boat that appeared to have gel coat on the inside.
>>
>>I am considering building a spare water tank out of plywood, lined and
>>taped with glass, and do not have a big selection of epoxy available
>>here. My thoughts were to go ahead and paint it inside with several
>>coats of epoxy, let it cure for several weeks and then flush it with
>>several/many changes of water.
>>
>>If some form of special, "This stuff is for lining water tanks" resin
>>was available I'd use it but as far as I can discover there is
>>nothing like that available in the country.
>>
>>Thanks for any information you can give me.
>>
>>
>>
>>
>>
>>Bruce in Bangkok
>>(brucepaigeatgmaildotcom)
>>
>>
>
>---------------
>
>gel coat is just thickened polyester resin.
>
>epoxies tested and approved for potable water (NSF 61 approvals) are
>generally (always????) test /approved for tanks over 1000 gallons or
>pipelines over 16 inches dia. Some folks don't worry about it, others
>do......
>
>paul
>- progressive epoxy polymers

Thanks, I understand.


Bruce in Bangkok
(brucepaigeatgmaildotcom)

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