I'm looking to paint my fiberglass boat. Can I use a 2pk epoxy barrier coat primer as my base on top & bottom?

Posted on July 4, 2009
Filed Under enart.investmentpany.com |

I'm looking to paint my fiberglass boat. Can I use a 2pk epoxy barrier coat primer as my base on top & bottom?

I'm gonna use a anti fouling paint on the bottom. & 2pk top paint. applied by roller & brush Yes, you can (and should) use a barrier coat for a boat that stays in the water. Interlux Interprotect is probably the most commonly used product.

The barrier coat is a good idea on the bottom (between your antifoulant and your gelcoat) to prevent water from permeating your gelcoat... if, in fact, your boat stays in the water. If you trailer the boat, don't bother. Just appropriately sand the bottom so the antifoulant will stick.

You don't really need to barrier coat your topsides. Just use a regular primer.
  • I agree that a 2 part epoxy barrier coat is desirable, but the surface preparation needs to be done. Epoxy coatings have good adhesion, but boats, particularly those that stay in the water, need to be cleaned and or sanded. Fiberglass is relatively porous and old bottom paint may be incompatible with the coating. Interlux has a good free booklet on preparation but seek expert advise as needed. Good Luck!
  • I agree with the comments stated before, but I can't believe nobody told you that barrier coat also traps moisture inside the hull, so check the hulls moisture content first before application. You don't want to barrier coat a "wet" hull and trap moisture( that equals blisters). I have watched boat sit at the marina for months and asked why, marina said they were waiting for the hulls water percent to drop.
  • yes you can as long as you grind it back and wash it with a silicone remover. A lot of boats have been pollished by backyard people and don't know what silicone pollish does

    max





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