> I have heard that the 3M '5200 marine sealant' is excellent stuff that
> never comes off. Maybe I should be using that?

I've used 3M 5200 normal cure on both my Pygmys' knee braces and the stuff is solid. We've turned them over in classes extensively and haven't lost anything yet. The stuff comes in black or white and the normal cure takes 2 days to lose its tackiness, and 7 full days to fully cure. Give it a try, costs only about $6-$7 a tube, and get it at Home Depot or the like. I also have some Hydrogrip I plan to use on hip & thigh foam. The stuff comes with a nasty warning about cancer, and isn't even sold in California. Guess I'll do it outside on a windy day.