[hackerspaces] liquid based non expanding insulation - name?

[Chris Weiss]

might be out of your budget, but I've found the great stuff "pro"
window and door cans to expand with far less force than the single use
window and door stuff.  There's also quite a lot more in the can, far
more than just the difference in can size.  Also with the gun, you can
use a small amount and then let the gun sit with the can on it for up
to a month and won't cure, great for prototyping iterations like you
seem to be doing.  Instead of 1 can per iteration, you might get 4-5
iterations per can.

On Thu, May 31, 2012 at 10:00 AM, Frantisek Apfelbeck
<algoldor at yahoo.com> wrote:
> Hi to all,
> I need to insulate around 5-10 cm space all around an inner polyethylen (PE)
> box (5 mm thick, cube, a=500 mm) and between it's outer MDF board based
> shell (12 mm thick, cube, a=600 mm). The device is going to be an
> experimental incubator, so temperature insulation is crucial. I have tried
> to use polyurethane foam but it is expanding therefore it would distort the
> soft PE internal layer. I used partly a polystyrene board for the back but
> the boards do not fit exactly (thickness) and due to the fact that I used
> screws and brackets in the project a lot it would be hard to put the boards
> in anyway.
>
> The best thing in this moment would be to fill the spaces between the boxes
> with some liquid un-expanding insulation which would get in all the spots,
> become firm and I would be fine. The plan is that I would insert the inner
> PE box, fasten it, flip the whole box on it's back side and fill the gap
> between PE box and MDF box up with the insulation and "happy ever after".
> Alternatively would you know if it would be feasible to brake down the
> polystyren boards on a small pieces and mix them with some glue and apply it
> in a similar manner? My budget for the insulation is $20-40 and I'm now in
> Seoul South Korea.
>
> Thanks a lot for any help! It is a prototype so a great learning experience
> but I have spend more than 20 hours on building two smaller size simple
> boxes - bit slow I would say.
>
> Sincerely,
>
> Frantisek Algoldor Apfelbeck
>
> biotechnologist&kvasir and hacker
>
>
> http://www.frantisekapfelbeck.org
>
>
> "There is no way to peace, peace is the way." Ghandi
>
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