In the recent thread about the Prijon Calabria there were several posts
regarding the difficulty keeping skirts on plastic boats.

Here is a cheap and simple solution.

Get a bar of surf board wax from a surf store. Rub it liberally around
and under the outer edge of your combing. It makes a "sticky" contact
between the skirt rand (outer construction of the skirt) and the cockpit
combing.

Cost is about a dollar.

I like Mrs. Palmer's cold water wax. It seems to stay softer in cold air
temperatures.