Getting her back tomorrow with new gelcoat on new transom. Looking for the best procedure for barrier coating prior to bottom paint.
Barrier coat
- Thread starter cdwood
- Start date
Go to interlux's website and follow their instructions. You have two choices, either use a hard bottom paint as your base coat and paint over it with ablative paint, or buy interlux's barrier coat paint and use that. The barrier coat is more work then hard bottom paint but both will serve the same purpose in the end if you go with ablative paint. If you do use ablative which I would highly recommend, mix some interlux paint thinner in with the paint when you mix it, I used about 1/3 of the thinner bottle in the gallon of paint, this made the paint go on thinner and smoother, was easier to paint and it will also wear more evenly and better. If you slop it on thick you will get a rough bottom and add too much paint. You need to sand between steps lightly, it is all writen out step by step on the website. I did it this season and it worked well and looked great. I used the interlux dark blue, it matched the grady boot stripe perfectly, but is hard to find.
As Gradyfish said, check out the Interlux site.Note that the site is Yachtpaint.com and not Interlux.com
Success with the barrier coat is dependent on surface prep, applying the correct thickness of paint and following the recoat time tables.
I don't thin my ablative bottom paint. I apply it with a short roller ( 4 inches I think). It goes on easily with that size roller. If you use a brush or a standard roller, your arms will fall off before you finish the job
Success with the barrier coat is dependent on surface prep, applying the correct thickness of paint and following the recoat time tables.
I don't thin my ablative bottom paint. I apply it with a short roller ( 4 inches I think). It goes on easily with that size roller. If you use a brush or a standard roller, your arms will fall off before you finish the job
Hookup1
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Bottom prep
The barrier coat has nothing to do with controlling marine growth.
The barrier coat is to protect the hull from water intrusion. Boats the have blisters in the gel coat strip the bottom, fix the blisters and then barrier coat it. Its at least two coats and a primer to get ready to bottom paint. Start with Interlux web site.
If you elect to not bottom paint you may still want to prime the new area your going to bottom paint.
The barrier coat has nothing to do with controlling marine growth.
The barrier coat is to protect the hull from water intrusion. Boats the have blisters in the gel coat strip the bottom, fix the blisters and then barrier coat it. Its at least two coats and a primer to get ready to bottom paint. Start with Interlux web site.
If you elect to not bottom paint you may still want to prime the new area your going to bottom paint.
Got her back today and she looks great. Only concern is the gentleman who did her thought he was doing me a favor by following the bottom paint across the transom. My concern is I do not know what paint he used, if it was copper based or whatever. My question is, if it is copper based and I mount an engine of alum. against this am I asking for problems down the road? Former posters on this site were adamant about leaving at least a 1 inch margin between paint ant engine. What are the real issues here?
It is advisable to avoid copper based paints on aluminum. If the aluminum was bare, I would be concerned. If it was fairly well sealed, then you will probably be OK.
On the issue of what paint was used, it is important to find out the brand and variety of paint so that next time you need to paint or touch up, you pick a compatible product and perform the correct surface prep. You might even ask for a small amout of the paint for spot touchups.
On the issue of what paint was used, it is important to find out the brand and variety of paint so that next time you need to paint or touch up, you pick a compatible product and perform the correct surface prep. You might even ask for a small amout of the paint for spot touchups.
DONT MOUNT AN ENGINE TO IT. My brackets are corroded from this form the previous owner. Your suspicions are correct, you need a small margin not necessarily a full inch, but you need some. You should sand off the area around the motor mount before you mount the motor, then repaint. jh