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:
> I just got an old roll of film back from the developer's, and I had 3
> shots of making my seat mold from plaster and a box of sand. I still
> haven't built the actual seat yet, as I've been busy building the
> Guillemot, but the mold is quite comfortable!!