Yes Tim thats it VALMUX. If RIB-X says that they use it on the RIBs that FALCON made I am not sure. FALCON told me that this is an experimental material that is not easy to flex and they use to see how it will cope in various environments right now.
If FALCON uses it to make RIB-X RIBs I think that I will be very much intested to know the true story