Another thought, using an FEP coating on top the PDMS, since the UV transmittance of FEP is around 82%; see this thread. If it works, it might have the huge bonus of not fogging too.
Another thought, using an FEP coating on top the PDMS, since the UV transmittance of FEP is around 82%; see this thread. If it works, it might have the huge bonus of not fogging too.