I got gas
Jack,
Just thought I would chime in.
Out gassing refers to vaporising components of the epoxy blend.You are seeing just air expanding from the mix.If you mix the A&B and vacuum the mix it will expand and foam 2 or 3 times the origional volume.De-airing a neet epoxy mix would require a 5 gallon bucket with only one gallon in the chamber to ensure it will not foam over the top.De-airing should be done before pouring into the mold and then mold vibration.There will be millions of bubbles expanding from the heat of exotherm and you will have to accept the top will not be perfect.
Larry
L GALILEO THE EPOXY SURFACE PLATE IS FLAT