Chandlery

Flag Paints Cruising Antifoul  £42.50


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Flag Cruising Antifoul
 

How FLAG Antifouling works

All FLAG antifoulings work using high concentrations of copper. Copper is a naturally occurring element in our environment and in fact in small concentrations is an essential trace element in plant growth.

 

When mixed with a resin binder (and colour of your choice!), the active copper is applied to the bottom of your boat such that some of the copper is always in direct contact with the water. The copper does not poison fouling agents like the old banned TBT (Ti butyl tin), but reacts with sea water to create ‘free ions’ or charged particles which in turn creates an unfriendly environment for sea creatures to adhere too. (Try licking the end of a 9V battery and you’ll get the idea!)

 

FLAG does not use any additional organic biocides in its formulations, maintaining only the use of naturally occurring inorganic compounds as the active ingredient.

 

FLAG Performance Extra has one of the highest concentrations of copper currently available and is made hard enough to be used on all types of craft in all environments.

 

FLAG Cruising Antifouling has less copper concentration and is made slightly softer so that fresh copper is exposed more quickly but is therefore more suitable for displacement craft in medium fouling areas.

 

FLAG Antifoulings can be used on all substrates (wood, GRP, steel, ferro etc) except aluminium as galvanic action between the copper and aluminium will lead to serious corrosion. 

 

How to apply FLAG Antifouling

 

Remember:

  • Preparation is everything. If the substrate isn’t smooth and sound, you can’t blame the paint you put on top of it!
  • Antifoulings change colour after immersion, generally turning a little lighter after a couple of weeks due to oxidation. This also shows the paint is working.
  • Do not use FLAG copper based antifoulings on aluminium outdrives or zinc anodes.
  • Iron keels should be ground and brushed until bright, any rust treated with FLAG Rust Converter and then coated with FLAG Multi Purpose Metallic Primer before antifouling.
  • FLAG Antifoulings are compatible with most other conventional antifouling but if in doubt, a barrier coat of FLAG Multi Purpose Metallic Primer should be applied first.

To apply:

  • Wear protective clothing and work in an open environment. Overalls, gloves, hat and protective eye wear are essential and a mask is advisable too. Tip: tape up the sleeve cuffs of your overalls with some masking tape to stop paint running up your sleeve when applying overhead.
  • STIR THE PAINT! Antifouling paint contains copper which is very heavy and easily settles. Use a flat blade stirring knife or similar (an old screwdriver won’t do!) or even better, a mechanical stirrer in a variable speed drill and when you think you have stirred it enough, stir it again! Keep on stirring it before pouring some out into your roller tray. Tip: Keep the cans indoors before using them as it makes them easier to use and store the cans upside down so you start with the copper at the top.
  • Although sprayable, the most common methods used are brush and roller. Use a short mohair or sponge roller suitable for gloss paint (emulsion rollers will disintegrate very quickly). Smaller radiator size rollers with a long handle are easier to use with such a viscous paint but may take a little longer. Use a brush to reach all the parts inaccessible to the roller. Tip: put your tray inside a polythene shopping bag before use so the tray stays clean.
  • Apply a minimum of 2 coats with extra around the waterline, leading and trailing edges and anywhere else where turbulence may occur.
  • Ensure the paint has enough time to cure properly before immersion to ensure adhesion. It won’t dry underwater! Applying antifouling in warm windy conditions will accelerate drying but may lead to an ‘orange peel’ effect finish. Generally FLAG Antifoulings do not need extra thinning but up to 10% can be added to assist applications in quick drying conditions.

Why 2 coats?

In order to gain the best performance from your antifouling, we would always recommend two coats. This is because however well you prepare the bottom of your boat, the difference in height between the high and low points of the substrate surface are invariably going to be greater than a single film of antifouling. That means the first coat dries to leave the ‘valleys’ coated but the ‘peaks’ still sticking out of the paint. Within a short space of time, algae will adhere to the peaks, followed by weed and later animal growth, by which time it’s grown a bridge across the valleys and the system has failed. By applying 2 (or more) coats, the substrate is completely covered thereby producing an homologous surface that does not allow any fouling to attach itself. Don’t be tempted to take a look at a hull you’ve just painted and say it looks covered either – remember for a paint to dry it will have to lose its solvent carrier and thereby shrink back somewhat. There are one-coat paints on the market but you should ask yourself whether your boat’s hull is really smooth enough to take advantage of it. Because lifting, scrubbing and launching is so expensive and time consuming we believe that 2 coats is a safer option.

 

As with all antifouling paint, it’s the amount of active ingredient that is applied to the hull which is the important attribute. Thinning it down or buying ‘extra value’ cans with so much ‘free’ may give you more paint but isn't necessarily applying more antifouling. FLAG Antifoulings are supplied in 2.5 litre cans and contain some of the highest concentrations of active ingredients in their class.

 

PLEASE NOTE: DUE TO SHIPPING RESTRICTIONS, THIS PRODUCT IS ONLY AVAILABLE FOR DELIVERY WITHIN THE UK OR IRELAND!

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