- Jan 20, 2009
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I am trying to make a vacuum formed copy from a vacuum formed master. The master is hollow (it's the Estes space shuttle) and I need to fill the inside so it doesn't collapse. My first thought was to use some sort of expanding foam, but I'm worried about it attacking the thin plastic of the shuttle. Can anyone offer any advice about this stuff? - brands, types, etc. About the only experience I have is using it to seal around the outside of my house!