4 years ago I had the saturated upper deck & core removed and replace due to the water intrusion from the where the mast mounted in the deck. The fiberglass shell was put back on and patched back in then painted with matching gelcoat with silica type nonskid additive. It looked great, all is well in the world, I feel as if I had it repaired properly and it should last a long time. (not a cheap repair about $7K) Well, now I am getting little spider cracks in the gelcoat and some seams where the replacement plywood core was installed are cracking and allowing a little moisture in get in. It does not go far, as everything was coated and put back with epoxy resin.(2 layers of 1" exterior plywood was used) But, it still required digging in with a dremel, applying the peanut butter looking epoxy resin with the chopped fiberglass and recoating with gelcoat. It has happened in 3 spots approximately 2" x 16" long for a total of about $1,200.00 for the repairs.
I have gone back to the yard that did the original repair and they said it is the deck flexing that is causing the problem. I am not believing that, it is solid as rock and does not flex and the yard is not offering any restitution, warranty or help, just more repairs.
That brings me to the product that Beach House Chuck used on his nonskid deck repairs. Do you think the flexible version of this coating would adhere and seal/waterproof my top deck and solve the problem I am having?