Mould sealant - UK suppliers

Hi All, just a quick, boring one really.

I need to seal a Perspex vacuum RTM mould, for use with Frekote 770NC.
I’ve seen Frekote FMS-100 or CS-122 look like they should do the job, but can’t find any UK distributors. Only need a small amount. Any ideas?
If not, any alternative sealing solutions (needs to be transparent)?

Cheers, ryan

Freekote b-15

If my memory serves me correct, Scott Bader are the distributor for frekote in the UK