Materials that were a “best fit” were not good enough for us.
We needed silicone rubber formulated to our exact requirements and there was no supplier willing to do this. That was in 1978. Primasil are now the European experts in silicone compound formulation mixing thousands of tonnes every year!
Of course, your requirements will not only be determined by the product characteristics - you may need specific approvals. We can supply material to meet specific approvals, and already have formulations which satisfy most global requirements.