Osmosis is a documented fact as opposed to a belief; air inclusions in Poly Ester resin allowing water in by osmosis over time.
That said, most builders now use VE resin, minimizing water transfer. Better builders also infuse, which completely eliminates air voids or wet bag which, when everything goes right, should also eliminate voids.
Lastly, Kevlar/Twaron is minimally hydrophylic, and, even when skin coated, as per the exterior on some, mostly race, boats and on the interior of just about every bagged canoe, is completely resin filled.
We've all seen skin coated boats in their second decade with resin flexed out of the fiber. Time for a new boat. Designs and construction have probably improved anyway!
Bent Shaft Canoe Paddles
Paddler's Truck Rack
Cartop Kayak Carriers
Heel and Pegpads™
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