"The stuff I've had experience using with was out of Phil Cleggs kit one fine rock hoppin' day in Rhode Island. In the UK it's known as Flash Band. Heavy duty aluminum foil on one side, the black sticky bitothane stuff on the other. The stuff I picked up at Home Depot was similar. It's mostly used for window flashings.
The aluminum foil is a bit thinner than what Phil had. I haven't had to use it yet so no report on how well it will work. When I used Phil's flash band, the hull needed to be mostly dry and the material needed to be warmed up a bit. It worked like a charm but once it was on the only way to get it off was with a sharp
scraper and lots of effort. Acetone would not touch any residue, it had to be sanded off. If ya holed your boat your'e gonna have to do some sanding anyway. I'm assuming the stuff I carry will work well as it is very similar to what Phil carries. I always carry a tube of 2 part plumbers epoxy. Works great for field repairs. I've used it in the field to fix up a pretty good size chunk that was taken out of the seam near my day hatch. Also carry an air bag in case I need to displace water in a hatch
from one of those big crushing holes that I hopefully will never experience.

Ron's got a great idea... field tests! I've got plenty of the material I've been carrying so if you need some let me know. Just can't remember the name of it. Happy Holidays Everyone!"

I second what Jim R. says above. I used some of the flashband (bithathane) that Jim R. gave me for a field repair on a boat in Maine several years ago. I did the repair on shore where I was able to dry the boat. The field repair lasted for months until I got around to really repairing the boat. The stuff comes off with a razor blade and Naptha which is great for removing adhesives. I have tried many different things on my old fiberglass boats which have become a good testing platform for field an permanent repairs.

Happy Holidays to All Too!
Ron