Anti foul recommendation for wooden hull?

[georgieb]

Have been reading and lots of conflicting information.
Have a carvel planking mahogany hull, all of the existing anti-fouling is flaking off.... so the question is, how should I prepare it, and which products to use?

TIA,
George

 

[Tranona]

Find out what brand is effective in your area - which could be many. Then get the information from the manufacturer on how to use their products. That will advise preparation and any primer or undercoats. The major manufacturers such as International and hempels provide extensive information on their products. Less common manufacturers may not have the same range, but be just as effective.

 

[KenMcCulloch]

You should try to remove by scraping any existing AF that's not very well stuck to the timber. Then it's a question of how much sanding you are prepared to do to achieve a smooth-ish surface. Some racing boats go to enormous pains to achieve a really smooth surface but it is a question really of how much work you think it's worth putting in. Dry sanding old AF use a good mask, preferably one with a proper filter and goggles.

Some types of antifoulings are not compatible with some other types (in relation to overpainting one with another) so you may want to try to find out what the old paint was. If in doubt paint over the old stuff with suitable primer (Blakes Underwater Primer is good but there are other similar products). You will, anyway, need to prime any wood that has been uncovered by your scraping. Once that's all done roller on a couple of coats of your selected poison and enjoy some sailing.

 

[LittleShip]

Have been reading and lots of conflicting information.
Have a carvel planking mahogany hull, all of the existing anti-fouling is flaking off.... so the question is, how should I prepare it, and which products to use?

TIA,
George

I have been using Flaghttp://www.tcschandlery.co.uk/8355/Flag-Cruising-Antifouling.html for about 6 years now and have had no problems with it wherever I have been.

Tom

 

[amstarminx]

Anti fouling on mahogany

Am the proud owner of a Alfred Mylne one Off.

Saturate the bare wood with D1 and than apply anti fouling over it without any sanding.
Works perfect ! Herewith I have a very stable and easy to keep up anti fouling system.
Hempel self-polishing red colour is what I use.
If desired I can provide pictures.
Willem

 

[oldfrank]

Isn't D1 a swimming pool sealant? Never on my boat, not in a million years.

If you want to get technical, take a water sample and send it for example to International Paints, asking for reccommendations. My father did this years ago and to their credit they suggested a Blakes brand. Different antifoulings simply work differently in different waters ... acid/alkali etc., etc. As has been already pointed out there can be a compatibility problem between various coatings which may well cause flaking - there's no real way of knowing unless the guy who put it on is still around. I hope this helps. OF

 

[burgundyben]

Isn't D1 a swimming pool sealant? Never on my boat, not in a million years.

If you want to get technical, take a water sample and send it for example to International Paints, asking for reccommendations. My father did this years ago and to their credit they suggested a Blakes brand. Different antifoulings simply work differently in different waters ... acid/alkali etc., etc. As has been already pointed out there can be a compatibility problem between various coatings which may well cause flaking - there's no real way of knowing unless the guy who put it on is still around. I hope this helps. OF

I think he means Owatrol D1, not for swimming pools as far as I know.

 

[tidclacy]

https://www.shepherdmarine.com/

Used this company's anti foul this year for the first time. Cheap and so far very effective. Went down yesterday to check my wooden dinghies and launch on swinging moorings at Burnham on Crouch (heavy fouling area ) and very little growth apart from a bit of slime.

As recommended by a very helpful chap at shepherd marine put hard on first followed by soft.

 

[jamesbell]

If you decide to use the Flag antifoul, you can get it from any toolstation outlet, http://www.toolstation.com/shop/Painting+Decorating/Anti+Fouling/d150/sd3261

 

[nispete]

Long life antifoul - ultra fine copper powder and epoxy

Hi,

I have heard many boat builders / owners swear by Cop'r Bote anti fouling - details can be found at http://boatcraft.com.au/Shop/index.php?main_page=index&cPath=4 - though it's not necessarily the cheapest alternative. Guess you get what you pay for, though.

Other debates and references to this sort of antifouling can be found at:

http://www.wharram.eu/cgi-bin/yabb2/YaBB.pl?num=1057442153

http://www.boatdesign.net/forums/materials/bottom-coatings-23157.html


Pete