Flag Paints Cruising Antifoul £42.50
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
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.
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