I remember my friends Udisco bucket boat that he lovingly referred to as "old patch-mo". After our first year rafting together, i explained to him how contact cement is supposed to work and the patching incidents went down about 80%.
Now a bad investment of $75 and about $32 in shore adhesive. We will always remember our first flip experience, on the "wall of death" ...
Hey, if you want me to take a dump in a box and mark it "guaranteed", I will. I got spare time.