I think that minicell foam is EVA (ethyl-vinyl-acetate?) I'm sure the manufacturers of the foam blocks pour some sort of liquid into a mold to make "buns" of foam 4-5" thick which they then slice into useful sizes. I worked with some brightly colored foam made in china which i used to make 3-d puzzles. some showed raw edges that looked like that stuff you buy in a can for insullation.

> Shawn, That looks like a great way of making a very comfortable seat. I'm
> wondering if there is a source of minicell foam in a liquid form that
> could be poured over a positive mold made following your procedure.

> What is the chemical composition of minicell foam? TAP plastics sells
> liquid "Room Temperature Vulcanizing" urethane rubber, silicone
> rubber and liquid latex for mold building. They also sell expanding
> Polyurethane foam in a two-part kit that becomes rigid after pouring.

> Brian

> Shawn wrote: