I just recently tried the REMA patch kit after dealing with the cheap box store ones for years (BELL),
It's like a Ferrari vs YUGO! The Bell is like gluing a brick to your tube after using REMA's.

I didn't have the cheap ones fail (although they were in MB tires, not higher pressure "road" tires), although I've had some "installation fails" that I had to re-patch.

I bought the box of 100 REMS patches because I was so impressed with them.

I did patch a tube using the BELL rubber cement & REMA patch and it seemed to work OK. Not quite as nice as using the REMA fluid, but good enough not to worry about.
It was for a CL flipper, so if I can go a couple cents cheaper on a patch.....and use up my 6 tubes of BELL cement.