I have had the best results by using epoxy to fasten Velcro to minicell and fiberglass. Rough up the back side of the Velcro with sand paper and clean it with rubbing alcohol for best results.

: Some time ago I posted about the problems I had fastening
: heavy-duty velcro to the underside of the foredeck of my
: strip-built Greenlander Night Heron. The velcro was intended for
: fastening a mini-cell foam masik at the forward end of my
: cockpit for thigh bracing. I received a number of helpful
: replies, none of which I can find.

: I bought some McMaster-Carr "velcro" similar to what's
: used to fasten transponders to car windshields. Someone, I think
: it was Brian Nystrom, suggested I first sew some nylon webbing
: to the velcro backing and then fasten that to the epoxied strips
: with epoxy. I plan to try that. What's the easiest secure way to
: fasten the McMaster-Carr stuff to the mini-cell foam? I'm hoping
: I don't have to go the webbing route for that. The masik has to
: be removed frequently, so permanent fastening is not an option.

: I've been away from this project for a long time as the result of a
: tree falling on our house, causing us to move out for almost
: half a year, and I'm anxious to finish up my outfitting and get
: back to enjoying the kayak.

: Len Thunberg