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We generally use a high build epoxy primer and then a finish primer and then a 2 part polyurethane. The barrier coatusually epoxy or similar material that seals out the moisture better than polyester gelcoatwas born.
You can re-gelcoat a smaller boat like a 13.
Epoxy barrier coat over gelcoat. I have read that in order for an older hull to dry out sufficiently you must remove the gel coat and let it dry out before applying an epoxy barrier coat and that it will not dry out without removing the gel coat. I also read of people putting an epoxy barrier coat over the gel coat. Do you have to remove the gel coat in order for a wet hull to dry out.
Lightly sand the rough gel coat and then apply 3 coats of epoxy 1 coat of primer and 2 coats of hard antifouling. On my boat I then applied 2 coats of self polishing antifouling. As the hard antifouling is a contrasting colour to the self polishing I.
The barrier coatusually epoxy or similar material that seals out the moisture better than polyester gelcoatwas born. Over the last 30 years or so techniques and products have grown to maturity. TotalProtect Epoxy Barrier Coat Primer.
Two-part high-build epoxy primer and barrier coat for gelcoat blister prevention and repair. Compatible with all antifouling paints this universal primer may be used above and below the waterline. It also provides superior corrosion protection on underwater metals.
To apply an epoxy barrier coat over the gelcoat your boat NEEDS TO BE DRY. This means that the boat was out of the water for at least 30 days. Have the hull checked with a moisture meter to ensure that the fiberglass bellow the waterline is dry.
Before coating a fully cured layer of epoxy with polyester gelcoat prepare the surface properly to remove any amine blush. Before applying gelcoat over epoxy. Allow the epoxy to cure to the point where sanding produces a fine powder.
Wash away amine blush with water and an abrasive pad such as a 3M 7447 Hand Pad. Those of us using epoxy never put gel coat directly on top the epoxy. We generally use a high build epoxy primer and then a finish primer and then a 2 part polyurethane.
We dont want to have to sand the epoxy but generally would prefer to. The prohibition against applying gel coat resin over epoxy is something of an old tale and it is advice that is often given. However it is possible to apply a polyester resin like gel coat over epoxy if the epoxy surface has been properly prepared.
As mentioned above soap and water will remove any amine blush from the epoxy. Your boat is going to be bottom painted the epoxy or gel coat of any kind wont be exposed directly to the water most of the time an epoxy barrier coat is applied to the hull then antifouling paint over it. That product also says it has a rough surface even if there was some benefit ceramic coatings tend to be hard to sand and polish.
In other words after stripping gel coat and making any repairs to delaminated areas exposed you would apply a couple of coats of clear regular epoxy to seal the laminate followed by multiple epoxy barrier coats Interlux 2000. Applying Gelcoat Over Epoxy - YouTube. The coating procedure is a combination of the first two procedures above.
Coat the areas of the hull where the gelcoat was removed with unthickened epoxy fill the holes with epoxy filler and fair and then apply 46 coats of the barrier coat material to the outside of the hull. Protecting your boats bottom from water intrusion is best accomplished with an epoxy barrier coat which is more effective in sealing out moisture than gelcoat. And therefore it is probably the single most important coating on your boat.
VC Performance Epoxy is an extremely hard two-component epoxy that contains Teflon. It has been designed for use on boats that do not require antifouling such as trailered or rack stored boats. The hard white finish resembles the original gelcoat and will resist scuffing marring and staining of the surface.
Other products boast only needing 2-3 heavy coats but in the end it may be a compromise on finish or having to sand between coats. Barrier coat epoxy primers also work well as general purpose epoxy-based primers for decks topsides and other applications. Typically only 1-2 coats are needed for these applications to get proper coverage and have enough material so that.
Epoxy Barrier Coat. Sand the bottom to the Gelcoat and sound it as best you canI suspect youll find no real damageHoweveryou do want to prvent water from migrating as best you can into the Glass works so Id use an Epoxy Barrier Coat available at most Marine Stores and do the job yourselfthis is a more permanant and for sure cheaper solution to your problem. Posted 08-26-2008 0551 PM ET US You are looking at three main choices.
Gelcoat one-part paints or two part polyurethanes. You can re-gelcoat a smaller boat like a 13. It involves spraying gelcoat then wet sanding the entire boat to obtain a shine there will be an orange peel look to the finish after spraying that must.
Wet over tacky provides the best interlayer bond and does not require sanding between coats of barrier. I see the barrier coat and the anti-fouling as two separate systems in which I place the utmost importance on the effectiveness of. Will Gelcoat Stick To Epoxy.
A final 80-grit sanding with the Fein orbital vacuum sander and I was ready to clean up tape off and apply a batch of new products to test. This time I rolled and tipped two coats of Pettit Protectan easily applied high solids epoxy barrier coat. And followed up with two coats of Trinidad Pro bottom paint.
Epoxy Barrier Undercoat is ideal for direct application to Fibreglass GelcoatGRP. To achieve adequate barrier protection Epoxy Barrier Undercoat may also be applied over surfaces primed with Epoxy Primer. For wooden surfaces that have not been pre-sealed we recommend the first coat of primer be thinned 30 to aid penetration into the.
If the fiberglass area used an epoxy product instead of a polyester vinyl ester or gelcoat product then make sure to wash the surface with a mild soap and water prior to sanding. If the area that is to be painted is epoxy based wash the surface with a simple soap and water solution to remove any potential amine blush as well. TotalProtect high-build marine epoxy primer is used as a barrier coat to prevent gelcoat blisters and is also an excellent primer for underwater metals.
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