Sdowney, can you give us an update on how the permaflex is preforming as an antifouling paint? Reply:
Sure, It is not an effective antifoul coating If you dont brush them off when small.
I have lots of barnacles. The coating is undamaged, barnacles dont affect it.
I think it has been a couple of years now.
This was a test and the boat mostly sits.
At first the barnacles were small easily removed simply with my hand, meaning no sticking. Easily brush everything off using my hands.
I just left everything alone to see what hapens and now some barnacles are about an inch and stuck on but can be scraped off with some effort. I was thinking of getting in when the water warms up and use a WOOD scraper made from oak to clean the hull and see what happens. what ever you use to clean with cant be sharp metal or you likely would cut the permaflex rubber.
Permaflex is acid proof so If I haul the boat, I will power wash, scrape, then spray HCL muriatic acid to dissolve anything left.
A sheet piece of permaflex I had in the water as a test grew some barnacles.
When they got to about a half inch I pulled the sheet and when I rolled it they popped off completely intact. Sort of peeled them off. So the barnacle's bottom was there and it is slightly concave. I think these things are sticking to the surface like a suction cup, but they dont harm the coating.
So If you were prepared to get in the water and scrub the boat once a month this would work ok. The bottom is basically dirty. This coating would require someone to periodically expend some effort to keep the surface clean.
some pictures showing intact peeled off barnacles etc New antifoul discovery - 100% effective AND green - Page 8 - Boat Design Forums