Anonymous
01-17-2003, 01:39 AM
I bought a 1989 22 predator from florida in the spring. When I stripped the bottom I found silver dollar size blisters. The previous owner said they appeared after sx years in the water.I moored the boat all summer in long island sound and found no new ones. Has anyone else had this problem?
Date: 09:04 a.m. on 12-09-2000
Leprechaun
premium member in standard member. 2. Re:osmostic blisters
Yep - seen them on 2 20' Predators. There's 2 schools of thought on these blisters. The first, and the one I belong to, says grind 'em out and fill with epoxy putty, fair and then coat the entire boat with 4 coats of Interlux Interprotect. Expensive and a PITA. School #2 says ignore them IF when digging into them you find no brown styrene foul smelling schmutz. I wouldn't count on the 2nd method if you plan on keeping the boat.
For more on this subject, check out www.yachtsurvey.com and go to the essay on Blisters. Great info in that article and the entire site in general. Regards, Leprechaun.
Date: 05:05 p.m. on 12-09-2000
Fish Magnate
normal member in standard member. 3. Re:osmostic blisters
I had them on my Trojan when I bought it. I would suggest that you grind/cut out the bad material and fill with 3M vinylester resin. If you use epoxy you will forever prevent the repair of your boat in those areas with polyester. The free amine in the epoxy keeps the polyester from polymerizing. I would tell you that the interprotect protective coating jury is out. I had no further blisters in 5 years without any further protection. My neighbor had a protectively coated boat and got blisters anyway. The coating is very expensive. I would fix the existing blisters and see if any more develop. If its just a few a year you can fix them very easily. If it becomes pervasive then you can always try the coating.
Just my 2 cents.
Date: 09:04 a.m. on 12-09-2000
Leprechaun
premium member in standard member. 2. Re:osmostic blisters
Yep - seen them on 2 20' Predators. There's 2 schools of thought on these blisters. The first, and the one I belong to, says grind 'em out and fill with epoxy putty, fair and then coat the entire boat with 4 coats of Interlux Interprotect. Expensive and a PITA. School #2 says ignore them IF when digging into them you find no brown styrene foul smelling schmutz. I wouldn't count on the 2nd method if you plan on keeping the boat.
For more on this subject, check out www.yachtsurvey.com and go to the essay on Blisters. Great info in that article and the entire site in general. Regards, Leprechaun.
Date: 05:05 p.m. on 12-09-2000
Fish Magnate
normal member in standard member. 3. Re:osmostic blisters
I had them on my Trojan when I bought it. I would suggest that you grind/cut out the bad material and fill with 3M vinylester resin. If you use epoxy you will forever prevent the repair of your boat in those areas with polyester. The free amine in the epoxy keeps the polyester from polymerizing. I would tell you that the interprotect protective coating jury is out. I had no further blisters in 5 years without any further protection. My neighbor had a protectively coated boat and got blisters anyway. The coating is very expensive. I would fix the existing blisters and see if any more develop. If its just a few a year you can fix them very easily. If it becomes pervasive then you can always try the coating.
Just my 2 cents.