JAXAshby wrote in message
...
JG, 5200 is a stronger adhesive than contact cement, but a.) the extra
strength
is of no use because the contact cement patch lasts as you wish to use the
sail, and b.) 5200 leaves a serious hard spot in your sail.

Don't worry about it. sail repair tape/cloth works fine and works for
years.

I have had a roll of sail tape for some years and have never used it so it
is clearly past its best now anyway. But the snag is that the instructions
say that the sail must be dry before using the tape. If you get a torn sail
how often is it going to be dry when you urgently want it back in service?