How do I get a solid balloon shape? Using a 3 Foot diameter latex balloon, need to fill with a solid, smooth material?
I need the shape of the Inside of the balloon - not the outside like papermache'. I tried Canned Foam Insulation "Great Stuff" brand; but it didn't expand and solidify. Then I need to cut it in half to get a hemi-sphere / hemi-balloon shape. A shape like half an egg, but 30" long, 19" wide, and 9" deep if laid on the flat side.
Will Gorrilla Glue puff up and stretch out the balloon?
Is there some kind of expanding urethane that doesn't need free air to cure?
Will a rubber mold making liquid like Vytaflex fill a balloon to it's "real shape" and cure inside without air? http://www.youtube.com/v/MJ9lgZ3V90o&autoplay=1 is a video of making a sink mold from an existing vessel sink. But I don't have an original of this shape to make a copy of.
Ice isn't permanent enough, but would be the perfect slick surface texture. I don't have the tools to cut a 30x19" sphereoid in half neatly.
The goal is to get a solid shape with a smooth surface to use as a mold for pouring material over to achieve a "bowl" shape with a very smooth interior surface and a hand formed outer surface.