What sort of condition is the silk in and how much border (if any) have you got?
I have found that if you can 'soft' dry mount silks by pre-mounting drymount film on a board (with the release paper left on top) and when it's cool, peel the release paper and position the silk. Back in the press for a very quick, low pressure. low temp squeeze. Virtually up to pressure and switch off.
The aim is to get a firm grip without the adhesive penetrating the silk too far. If you do it right you can peel the silk off again quite easily, but it will stay clinging on. I wouldn't do this on anything remotely valuable, but it's an option.