bottom paint and sealer

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str8fishon

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hey guys i had a question regarding bottom paint and sealers. i have a 1980 grady white 24 offshore. The bottom has never been painted. I bought 1 gallon of interlux interprotect 2000E and 2 quarts of micron csc. I bought this amount based on what another of my dealers customers bought for a similar sized boat. Now upon reading the packaging on the interprotect it says i should do 4-5 coats. i know 1 gallon will not do this on my boat (240 sg ft is coverage of 1 gallon). Upon reading the interlux's website they say you can do 1 coat or 4-5 coats. Having never painted the bottom of a boat i was hoping that someone could give me some real world advice about what they did on their boat, how it worked for them and how much sealer and paint it took. thanks
 
I redid the bottom of my Seafarer a few years back and unfortunately I needed about 1.5 gallons of Interprotect to get 4 coats on. I only got 2+ coats out of a gallon, and that was using epoxy thinner to thin it out some. Sure dealers will say a gallon will do, but if you're doing it yourself and want it to be done right, you definitely want 3-4 coats.

Also, I bought 2 different colors- white and grey. Put 2 coats of grey on white hull to show total coverage, then did final 2 coats in white to again show total coverage.

Use a drill mixer attachment to mix the eopxy paint and activator, and add some epoxy thinner (don't recall the Interlux thinner #) to help with even spreading. You need a foam roller (actually a bunch of them)

And you are probably going to need another quart of CSC, which in effect brings you up to the total cost of a gallon. You'll want 2-3 good coats of bottom paint. I'd take the 2 qts back and exchange for a gallon.
 
Concur with uncljohn.

Be careful about the temperature of the air and the surface when you apply the barrier coat. Of course, surface preparation is critical.

Also critical is the timing of the first coat of paint after the last barrier coat. If you don't get it right, then you may have a bonding problem between the paint and the barrier.

Brian
 
Also concur with previous 2. Did my 24' in 2003. Although my memory is fuzzy I thought there was something on the directions for the interprotect that stated the importance of applying the additional coats before the previous fully dried. Mine dried quickly and I had to apply the additionals in a hurry. Did it by myself and wished I had some help in the re-application. If my memory serves me that was sometime in April. Again, stuff dries quickly. Like said, I'd get a gallon of bottom paint......unused will keep. Mine has held up just fine. Get the gray, if I may say it's no need to purchase mutiple colors or a hard off-color bottom paint. When the ablative wears off, you'll see the gray. Maybe I'm wrong here but I would think it would be a good idea to sand the bottom before applying, maybe someone else can comment on that.
 
like the 2 previous posters said, read the instructions for the Interprotect VERY carefully. Take note of every specific solvent wash & thinner b/c you will need to buy them. You'll need to wipe your hull w/ solvent wash (do NOT use latex gloves for this job). Your hull should have a sanded finish.

And the timing betw the last barrier coat and first paint coat I recall is most important. Its like "At least 4 hours but not to exceed 8 hours" (I'm just making that up but its something fairly restrictive that you have to plan carefully).
 
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