Last year I performed a few repairs on my Romany that I use for guiding. I paddled some 450 miles guiding and my kayak probably road on the trailer 2-3 times that distance. This past year I made sure that it only rode on the good trailer and that the people loading trailers knew not to tighten it with all their strength. So, all my repairs from last year (hatch rim re-attachment, bulkhead patch, and keel strip) held fine for over a year now.
The KeelEazy keel strip is not staying on around the skeg, but is working great in other places.