The company I talked to had similar products, but they all react at temperatures higher then we need, I guess.

http://motoform.blogspot.se

300degrees is indeed a very high temperature.

Here is scanned article about south African motorcycle carbon wheel manufacturer BST.
Images turn out small, see attached files below.

http://motoform.blogspot.se

thanks prsw, 

just came up with a new theory,

Hi Matt

I came across an article in (I think it was called) Composite World. There was an article with pictures of them makong a airfoil for a race car. They used silicone and a aluminium mould and heated press.It was very interesting and I would like to try it my self.

Fred

yes maybe, but will the pressure be high enough?
The silicone gives a mechanical pressure, not like a "gas" pressure, but on the other hand thats what you get in an autoclave.

Crazy idea, use only water like in hydro forming.
Moulds have to be strong in any case.
Do you have a good system for making bladders?


https://www.youtube.com/watch?v=I_Z3AIFSd60

Update
I have called a company who told me to call another company who told me to call another company who told me to call the first company again.
I have not called them again yet, but will soon.

On of them was Wacker, http://www.wacker.com , they are quite specialized in silicones but they could not deliver this, at least the Swedish office
didnt know about a heat expanding silicone, but, they told me that it could in fact be an ordinary RTV2 silicone, that expands in heat just like any other material.

http://motoform.blogspot.se

Here is the link to the article I spoke of. Its awesome and so high tech.

http://www.compositesworld.com/articles/high-speed-press-cure-for-high-speed-racers

Fred

Thanks for the updates! Fred, they don't really talk about the silicone expanding but more as a core material that is removed afterwards?!