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Forum Index : Other Stuff : Hot Water Thermal Losses

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Downwind

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Joined: 09/09/2009
Location: Australia
Posts: 2333

Posted: 05:24am 03 May 2014

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Quote Perhaps you could cover with the Styrofoam, fill with PU expanding foam and apply a layer of F/glass to keep it all together? The PU and poly styrene foams both shape well using very coarse sandpaper.

All good, but this could read as glassing over styofoam is recommended, and simply it wont work, as the vapors alone in polyester resin will melt the foam regardless if its in direct contact or not.
Although PU expanding foam can be glassed over with no problems as Mobi has suggested.

Pete.

Sometimes it just works

MOBI
Guru

Joined: 02/12/2012
Location: Australia
Posts: 819

Posted: 01:29pm 03 May 2014

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Quote All good, but this could read as glassing over styofoam is recommended, and simply it wont work, as the vapors alone in polyester resin will melt the foam regardless if its in direct contact or not.
Although PU expanding foam can be glassed over with no problems as Mobi has suggested.

Sorry, I should have specified epoxy not polyester. Even so, you can use polyester resin on polystyrene if you paint it first with a good coat or two of neutral sealant such as acrylic paint.

David M.

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