: Does anyone know what kind of foam is used inside of foam-cored paddle
: blades? I built a couple of them with some polystyrene that I got from a
: surfboard shaper, but I'm not convinced it's the best type of foam to use
: for paddles. I also have some polyisocyanurate. It's stiffer than the
: polystyrene, but I'm not sure how well it'll bond with glue or epoxy.

: Thanks in advance for any insight.

: Pedro Almeida

Btw, here's a good basic foam article (link) for structural foams:

http://boatdesign.net/articles/foam-core/index.htm

Bill H.