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Posted: Sun Jul 11, 2010 1:47pm

Post Subject: Zinga coating

What are the benefits of Zinga coating over bitumen based blacking. Is the difference in the cost justified?


Posted: Sun Jul 11, 2010 8:46pm

Post Subject: Zinga coating

Zinga is a zinc rich "paint" that is claimed to act as a sort of hot dip galvanising but with the ease of application of a paint. I suggest that you take some trouble to read the data sheets on the Zinga website. They specifically state that over-painting with a coat that contains a solvent may cause a breakdown of the Zinga coat and as far as I know all paints apart from water based ones contain solvents so they are covering their backs. I believe that zinc and hydrocarbons like bitumen can cause a reaction so if there is any likelihood of bitumen being used in the future I would suggest it is better to avoid it. If you want a dull grey hull then Zinga may be a good coat, but if it is why do so few boats use it? You also need to be aware that you will have to keep on repairing the inevitable battle damage to maintain the film. Personally I can see more potential pitfalls that real benefits. We have 40 year old boats with plating between 4 & 6 mm thick still in serviceable condition with regular blacking so how long will or 10-6-4 hulls last with blacking? Tony Brooks

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