- Anyone try this stuff. It is sold by aircraft spruce. They make it sound as between non-structural on one side, but as good as polyester on the other. Polyester isn't glue, but structurally it is OK, and many decent boats were made with it. Up here it is the cheapest stuff, we don't have any of the half dozen cheaper but tolerable brands that are sold in the US. But I can't even find out much about it on the aircraft groups.