If there is a core material, it will be
Posted by: g2d on Oct-07-12 5:57 PM (EST)
closed cell and not able to get "waterlogged." I have a slalom boat where the deck is foam sandwiched between single layers of Kevlar and epoxy. That skin gets cracked occasionally, but no waterlogging occurs.
Also, claims by some that damage to a Kevlar hull will result in water soaking all through the laminate are false. It just does not happen. Cloths encapsulated in epoxy or vinylester resin do not get "waterlogged."
Celia cited the possibility that small amounts of water could get into delaminated areas. That can happen, but it's no great problem as long as the boat is dried out and repaired within a reasonable period of time. Reasonable means within a few months.