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Bottom Paint

Discussion in 'Cruising Sailors' started by seadaddler, Jun 8, 2019. Add this thread to a FAQ

  1. seadaddler

    seadaddler

    Joined Dec 19, 2006
    5,558 posts, 158 likes
    Hunter 36
    US Punta Gorda
    hanging from anti fouling to a hard bottom paint.
    My new diver for the last year is a great guy spending one to two hours cleaning my
    bottom every month and my antifouling is coming off sooner than in the past so some of others sailors using same diver have also changed to hard bottom and so I am doing the same
    Nick
     

    Attached Files:



    jeff356 and JamesG161 like this.
  2. Ken Cross

    Ken Cross

    Joined Oct 24, 2010
    1,981 posts, 327 likes
    Hunter 30
    US Everett, WA
    We can't legally scrub soft paint in the water here. In 2021 we won't even be able to use copper bottom paint. I find it interesting that anyone can clean it in the water. How much toxic paint do you suppose gets transferred to the water in your harbor. It sounds like hard paint would be much better in areas where you need to manually scrub the bottom in the water.

    Ken
     


  3. seadaddler

    seadaddler

    Joined Dec 19, 2006
    5,558 posts, 158 likes
    Hunter 36
    US Punta Gorda
    Most sailors use ablative because they are afraid of build up over the years and hard bottom would be much better for our water in harbor.
    Takes me 5 minutes to get out into harbor and so I get a lot of water movement at my dock
    and our harbor is a mix of the gulf and the peace river.
    Nick
     


  4. fstbttms

    fstbttms

    Joined Feb 26, 2011
    1,128 posts, 135 likes
    Achilles SD-130
    US Alameda, CA
    Studies show that very little copper is committed to the water column via in-water hull cleaning activities. The number runs around 5% of the copper that gets into the water from anti fouling paint comes from hull cleaning. Which means 95% of the copper comes from passive leaching of the biocide, which happens 24/7/365. And that includes both hard and ablative paints.
     


  5. Project_Mayhem

    Project_Mayhem

    Joined Sep 24, 2018
    414 posts, 81 likes
    O'Day 25
    US Waukegan
    Do you mean the paint is wearing away or you're finding chunks missing? I had ablative come off in chunks on a rudder that wasnt prepped properly
     


  6. jeff356

    jeff356

    Joined Apr 21, 2014
    143 posts, 28 likes
    Hunter 356
    US Middle River, MD
    Your bottom looks good :laugh: I just took mine down this spring to the gel coat because of an adhesion issue and too much paint build up, royal PITA...
    Do you have a barrier coat under it and did you remove all the ablative paint before painting the hard?
    Jeff
     


  7. Ken Cross

    Ken Cross

    Joined Oct 24, 2010
    1,981 posts, 327 likes
    Hunter 30
    US Everett, WA
    Do you have those studies handy? I'd love to see our copper ban repealed. It was put in place based on some study in California but nothing in our local waters. And it only applies to recreational boats.

    Ken
     


  8. fstbttms

    fstbttms

    Joined Feb 26, 2011
    1,128 posts, 135 likes
    Achilles SD-130
    US Alameda, CA
    You do not have a ban on copper- yet. The implementation of that legislation has been pushed back a year while the powers that be rethink the wisdom of doing it at all.

    You'll have to Google the studies to which I referred. I don't have links.
     


  9. jssailem

    jssailem

    Joined Oct 22, 2014
    9,591 posts, 4,307 likes
    CAL 35 Cruiser
    US Salem, Moored Port Everett WA
    This is Washington. They may just be rethinking how they can get more money out of the boat owners... But I would like to think you are more correct.
    They also may have a bit of an issue. There is not enough paint in the area that is not copper based.
     


  10. sail sfbay

    sail sfbay

    Joined Feb 21, 2013
    44 posts, 19 likes
    Hunter 46
    US Point Richmond, CA
    The attached article on bottom paint may be of interest. Suggest discussing bottom paint choice with your local boat yard. In San Francisco I put on 2 coats of Interlux ultra-kote hard paint and get 3+ years of service between haul outs to repaint and the hull cleaning divers like it because the hull is easy to clean.
     

    Attached Files:



    jssailem likes this.
  11. fstbttms

    fstbttms

    Joined Feb 26, 2011
    1,128 posts, 135 likes
    Achilles SD-130
    US Alameda, CA
    No offense, but the boatyard is the last place to get good advice about which anti fouling paint to use. They're experts at painting boat bottoms, not maintaining them once they're back in the water. The boatyard only sees your boat's hull once every few years or so and has zero idea of how well your anti fouling paint has been performing in the interim. The boatyard's interest is in selling product, frequently one on which they have gotten a good deal, regardless of how well it may (or may not) suit your particular anti fouling needs.

    The best resource for this kind of information is your hull cleaner. He or she sees every anti fouling paint product available in your area doing its job day in and day out, in real world scenarios. Your hull diver knows what works and what doesn't and gains nothing by recommending to you an inferior paint.

    BTW- this hull diver never recommends Ultra-Kote. Not when Pettit Trinidad is available and on the shelf right next to it. :thumbup:
     


    Last edited: Jun 14, 2019
    jssailem likes this.
  12. sail sfbay

    sail sfbay

    Joined Feb 21, 2013
    44 posts, 19 likes
    Hunter 46
    US Point Richmond, CA
    fstbttms,
    Good to know!! I took note of your Petit Trinidad recommendation for my next bottom paint job and as I see you are also in the SFO bay.
     


    jssailem and fstbttms like this.
  13. fstbttms

    fstbttms

    Joined Feb 26, 2011
    1,128 posts, 135 likes
    Achilles SD-130
    US Alameda, CA
    We’re in Brickyard Cove every week.
     


  14. JimInPB

    JimInPB

    Joined Aug 22, 2017
    1,524 posts, 436 likes
    Hunter 26.5, 212, 170
    us West Palm Beach
    Do you have recommendations for warmer water bottom paints???
     


  15. fstbttms

    fstbttms

    Joined Feb 26, 2011
    1,128 posts, 135 likes
    Achilles SD-130
    US Alameda, CA
    There are only two paints I ever recommend: Pettit Trinidad and Interlux Micron 66. They are the best paints you can buy, IMHO. But depending upon where you do your boating, YMMV. Again, talk to your diver.
     


  16. JimInPB

    JimInPB

    Joined Aug 22, 2017
    1,524 posts, 436 likes
    Hunter 26.5, 212, 170
    us West Palm Beach
    Unfortunately, I am my diver, so I only know what is happening on my boat.

    Thank you for the two recommendations.
     


  17. fstbttms

    fstbttms

    Joined Feb 26, 2011
    1,128 posts, 135 likes
    Achilles SD-130
    US Alameda, CA
    Well, I know a lot of Florida divers swear by Sea Hawk products. I have never come across one that was worth a damn, but I'm not in FLA. :p
     


  18. ToddS

    ToddS

    Joined Sep 11, 2017
    123 posts, 53 likes
    Beneteau 373
    US Cape Cod
    "never come across one" Sea Hawk product...
    or
    "never come across one" Florida diver...
    ?
    ;)
     




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