proper procedure for barrier coating

[joe]

I am considering a barrier coat with interlux2000 done by a gentlemen who was recommended to fair my keel and rudder. The question is he wants to just place a moisture meter on the hull if it comes out normal then go ahead and put the barrier coat on this spring. My boat is just 3.5years old. I asked him if the hull should be sandblasted and allowed to dry out better he responded that because the boat was so new and there were no sign of blisters as long as the moisture meter was normal he would recommend to procede and barrier coat with a light sanding. He maintains that he has done 8-10jobs a year for the last few years so I believe he is experienced. I have a very expensive boat and would like to protect my investment. what should I do? Thanks for any forthcoming advise.

 

[Pete]

barrier coating

Joe, I'm not sure I would do anything at this time,Not knowing what type of boat you have but I do know that sandblasting will void you warrenty if you have a Hunter. I would suggest to you call the manufacture (boat) and disscus it with them and also call Interlux and ask there advise and mull over your concerns. I'm not sure it would be a good idea to barrier coat at this time.Maybe after the warrenty is over you might think again about a barrier coating in the mean time the warrenty should give you all the protection you need !

 

[Tim Schaaf]

Your expert is exactly correct....

....and is describing the process detailed by Interlux, in their manual, exactly. I agree with R.W. Landau that it makes sense to go ahead, and I will bet a good job will increase resale value. By the way, if you talk to the Interlux techs, they will also tell you that you should actually use about twice as much as is in the manual (for a total of 10-12 coats - water resistance is a function of thickness and you really want 20-40 mils), you should go about six inches above the waterline (which might mean a new boot stripe on top of the upper part of the barrier coat), and that you should keep a dry bilge, or barrier coat it, as well. Good luck, the stuff works.

 

[R.W.Landau]

John

Tom Ehmke's post said O'Day also.I was in the O'Day forum when I saw Joe's post. Right above the text box For responding to a post is a box marked "Your post is reevant to which Oday model(s)?" and the pull down box says "3800"r.w.landau

 

[James rohr]

Don't sandblast

I have a 1979 O'day 30. bought it in 1991. Surveyor told me that it had the beginnings of blisters. don't worry about them for 4 or 5yr. at that time I did a lot of research on the problem. Universally everyone said if you want it cheap sand blast it, if you want it right it right peel it. I did mine right away. I wanted to do it before I had a soft hull. I sanded mine with one of those gorilla 7" power sanders. primed it and coated w/ interluks 2000. I have yet to see any sign of a blister comming back. 11years now. on a new boat I would be very reluctant to sand blast. I would just lightly sand to rough up surface to prov. good bonding and coat. one other item is interluks says you can bottom over w/o any prep if done within 24hr. Don't believe it. wait 48, lightly sand,wash and then put on paint. I had one small area where it was painted right away and the paint peeled the first season.