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Unread 11-29-2013, 12:26 PM   #1
machartm
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Great Stuff Gap Filler

I'm using this stuff for the first time and I have a very serious question....

How do I avoid bubbles in the interior after spraying? Especially these huge cavities that form?

I watched a few videos and this person gets their foam to come out very dense, almost like pink insulation foam. While me, even on my second try, still looks more like a sponge, with big pockets here and there.

Does anyone have any tricks? or Tips?
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Unread 11-29-2013, 07:25 PM   #2
JasonTerror
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I'm no expert with the stuff since I only use it to fill things, rather than carve it, but it might be how much is used. Maybe using more in the space will make it thicker like that..Like, as in while spraying, going really slow as appose to faster..Think about that like spray painting..If you go slower, you get more paint in one area, but the faster you move along, the less paint there will be in that area. Maybe going slower will help
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Unread 12-08-2013, 01:29 AM   #3
Frekki
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I have the same issue that you described. I don't know how to prevent it, but you can always go back and fill in the large gaps with more foam! I find that the thinner the foam is, the less airbubbles I get. Also, going slower does help to some degree.
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Unread 12-08-2013, 01:40 PM   #4
Mehdia
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My brothers have both used this for props in the last few years and while they got some bubbles, they didn't get huge ones because they sprayed it in small sections and even used the spray that specifically said for gaps 1" or larger. Both of the props were quite large, one being Alice's Hobby Horse from Alice Madness Returns and the other was a 1/1 scale Kakuna from Pokemon. For the Hobby Horse, my brother first made a skeleton of cardboard, so he had these little shelves to fill in instead of spraying a blob and then carving. I don't know if Kakuna was done that way, but I think it was.

If you want, I could always ask them about what they did in more detail and share it with you. I know my brother at one time was going to make a tutorial on how he did the Hobby Horse, but he's never actually made it.
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