Simondo said...
In theory, EPS (expanded Polystyrene Foam) does not suck water / absorb water. But you still don't want water getting in. Also, in theory, the EPS Foam should be well bonded to either the sandwich layers, or Epoxy & Fibreglass. But logic says, you want to seal it up.
Nail Polish is a great cosmetic cover up. But if you ding your board bad enough to expose foam, or crack and dent the epoxy, or sandwich layer, then you can do a cheap repair at home, and fill it with an Epoxy like Araldyte, perhaps in 2 stages for a better job. Sand back any bumps. Then you have the option to leave it, nail polish, or whack a sticker over it !
Nice theory and partially correct, the foam component of EPS wont suck water but EPS is made up of very thin-walled beads, surrounded by open channels. On a 100lt board you can have in excess of 30lt of air space in these channels which can and will take on water. Big problem is once the water gets in it is very difficult to get it out again.
.. and it's just a temporary fix to seal it and prevent further damage from water getting in.
