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Old 01-06-2017, 12:13 AM   #12
phil herranen
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Join Date: Apr 2007
Location: santa cruz
Age: 48
Posts: 5,473
Re: Travel Float / Bag Stiffener Build

You would think that the steam would go out how it came in but it rarely works that way , I've had flat floats similar to yours puff up like a football in a mater of minutes in the sun .

It's not off gassing that's the problem ,it's simply the air that's in the foam expanding when it heats up and the contracting when it cools . Starting warm and letting it cool as it cures is the proper way to do it but it won't prevent the air from expanding again when it heats back up (or is in the unpressurized cargo on a plane )

The other problem is there is almost no soak in of the resin like.there is on eps so you are completely relying just the surface . With eps the resin will soak in at least 1/2 to 1" down between the beads making a very strong bond between the glass and the foam
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