Antifouling - how much to cover 24 footer?

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In real life, not manufacturers ideal coverage.

[/ QUOTE ]First mistake! If you don't apply the amount the manufacturers recommend, it won't perform the way they say it will. And you'll be dissatisfied - like lots of people who post here saying their antifouling is useless.
 
Don\'t think so...

Reckon you'll need around 4 litres for 2 proper coats. International have a paint calculator for antifouling - see here - note that the quantity of paint indicated is per coat.
 
Agree with pvb. Put on what the manufacturer recommends or the result will be poor. Unfortunately there is no such thing as the perfect antifouling anymore because legislation has forced the strength to be reduced over many years.

Your boat should need about 2 - 2.5L and 2.5L isthe can size for most major brands. Use the whole tin however many coats it takes and as someone else said put a bit extra on the leading edges of the rudder, keel and forefoot. Also around the water line as these are all areas of high wear or high fouling. Unless you have a mud berth I would recommend an eroding antifouling which means it slowly dissolves into the water and helps to reduce build up of thickness on the hull. Remember though, if you scrub to remove any fouling that does settle you will remove a lot of the antifouling too.
Finally, check compatibility with what you already have on the boat. It will probably be OK bot if there is any doubt you may need a primer to isolate what you already have.
Once this horrible job is out of the way - happy sailing!
 
When are you planning to launch? If you are thinking about applying antifoul now but not launching until the spring then you may have to freshen up the surface with a scourer before launching. Read the tin - most specify the max period of air exposure before launching (normally three months if memory serves)
 
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good advice. Thanks! So how many cans as a guesstimate?

David

[/ QUOTE ] One 2.5L can should do two coast and a bit extra on the leading edges of your rudder and keels.

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Spot on. This is what I did with my 26ft centaur, last afouled 2 yrs ago.
 
My 747 took about half a 2.5 litre tin last year, applied by roller. It seems to take more if applied by brush, which I suppose tends to go on thicker. The boot top was done separately with a hard antifoul, which seems to have done better than the eroding stuff below the waterline. I think you will need some trial and error to find out how many coats and what type of antifoul work best in your conditions.
 
length of waterline x width at waterline x y
in your case y would be about 1.3
6.5x2x1.3=16.9sq m
the tin probably covers at about 6sqM?? per L depending on the manufacturer???
16.9 / 6 = 2.8 litres per coat.
allow 2 coats.
5.6 litres

basically y, is a figure that can be used as a multiplier to allow for the curve in the hull. on a flat bottom power boat y is about 1.2, on a deep v keel boat y is about 1.5, and can be adjusted for anything in between.

Remember to calculate on the length and width of the waterline and not the LOA.
 
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