How often do you dry dock your boat? Not too frequently? Well, then you most likely need a good can of boat antifouling paint. In fact, applying boat vegetative is among the most common jobs among boaters, in fact, this action could even be seen as the most typical of boat maintenance tasks. Do you have any doubts about which product to choose? Do you want more information about self-polishing and electronic antifouling? Do you want to know what are the average prices of antifouling? Well, in this little guide we will explain everything you need to know about this particular product to protect a boat's hull from the threats of marine vegetation.
What is Veneziani antifouling paint?
Let's start with some of the most common questions among those who approach boat maintenance for the first time: what is, and how doesboat antifouling paint work? What is it used for? The function of this product is that one to contrast and to prevent the adhesion to the hulls of the boat of marine organisms that, once present, could colonize very quickly the whole hull, causing some not negligible problems. We speak mainly about the silent attack of algae, of dog teeth and of silt, surely not very kind towards the hulls of our boats. The incrustations of the hull are not limited in fact to undermine the performance of the boat, coming to damage the hull itself.
But what is the composition of this product? Antifouling is made up of biocides (but not only), which prevent the formation of marine flora and fauna. Shall we spend a few seconds to learn what biocides are?
Biocides at a glance
We have already mentioned that antifoulings are mostly composed of biocides. But what is this particular substance? Well, a biocide is defined as any product containing active microorganisms capable of eliminating or rendering inactive other organisms. There are mainly four different types of biocides, namely disinfectants, preservatives, pest control products and other types of biocides.
In terms of antifoulings for boats, the most common biocide is certainly copper oxide, which over the years has gradually replaced tin (the latter has recently been banned due to its high environmental impact).
How do Veneziani antifouling paints for boats work?
Let's talk aboutVeneziani antifouling,Boero antifouling,International antifouling and all the other antifouling paints of this type that you can buy online and in physical stores: the basic functioning is the same. In fact, antifouling for boats releases into the environment - in a controlled manner - a minimum but still effective amount of biocides, capable of reducing to a minimum the action of organisms and microorganisms that are dangerous to the health of the hull.
Starting from this common base, different types of coatings can be distinguished. For those who are particularly attentive to the environment, there is, for example, the ecological option of Veneziani antifouling, or the well-known
However, there is a formula that can help us to carry out an exact and scientific painting of our boat - don't be discouraged, it's absolutely not as difficult as it sounds. There are three starting data from which we must begin to find the paintable surface of a boat, namely:
The A value, that is the waterline length
The B value, corresponding to the maximum beam of the boat
The C value, that is the draught of the boat
Once these three figures have been identified, they should be entered into this formula:
[A * (B 2C)]=
Nothing too complicated, right? (To make the result more precise, you can multiply it by the hull curvature coefficient, which differs between the various types of boats). ) In this way, we will have the total surface to be treated, on the basis of which we can calculate the amount of antifouling required. This last calculation must be made bearing in mind the yield of the product chosen, which varies from paint to paint. Generally speaking, however, we are talking about one litre produced every 10 square metres: dividing the surface area calculated using the above formula by the yield, therefore, we will have the exact quantity of antifouling needed for one coat.
Be careful, however, not to skip the last step of the calculation, which is the doubling of the final result: it is always advisable to apply two coats of product over the entire hull. A boat with a paintable surface of about 30 square meters, therefore, will need about 3 liters of product for each coat, and then, finally, 6 liters total.
If in doubt, it is still better to buy extra paint. There are in fact specific parts that require not one, not two, but three coats of product: we are talking about the rudder, the waterline and other areas subject to higher erosion (which, as we shall see, can also be treated with specific paint).
Compatibility between various types of antifouling paint
We have seen above that, in general, there are two different types of protective paint for boats. What should you do when applying a new paint? Looking at the hard matrix ones, there are no major problems, as they can also be coated with self-polishing products. The latter, on the other hand, can only be coated with paints of the same type. If you want to switch from self-sanding to hard-matrix antifouling paint, you will need to apply a coat of insulation to separate the two layers.
Antifouling paint for special boat parts
Those who take care of their boat from year to year know it very well: for propellers, axles, stern feet, rudders and bulbs it is recommended to use special paint, so as to ensure the well-being of these particularly exposed areas.
Preparing the hull for antifouling application
It should be stressed that, before any new application, the underlying layer should be carefully sanded. As we have already mentioned, in the case of self-sanding varnish you will be able to rely almost entirely on hydro-polishing, while in the case of hard matrix varnishes you will have to make a bit more effort. In order to be sure not to damage parts that will not be touched by the new paint, it is advisable to mark off the area to be sanded with rubber tape. You will have to start with a rather coarse abrasive paper, and then finish - just before painting - with a fine-grained paper, so as to have a hull as smooth as possible.
But what happens, instead, in the case of a new hull or restored raw? What must be done before using our antifouling paint? After removing any remains of paraffin and wax, a primer must be applied, to be chosen according to the material to be protected. An example? Even before choosing the most suitable antifouling for fiberglass boats, in the case of a new or raw hull, it will be necessary to use an anchoring primer for fiberglass, such as the one produced by Veneziani.
Veneziani, Boero, Cecchi, International... Which antifouling paints should I choose?
There are indeed many brands that sell quality antifouling: there are Cecchi, International and Boero antifouling paints... We at HiNelson, however, have a particular preference for Veneziani antifouling paints. We are talking about a prestigious company founded in 1863 in Trieste, which immediately attracted the attention of the military navies, from the British one onwards. Innovation is at home in the over 120 thousand cubic metres of the Veneziani factories. A good 1,500 square metres are dedicated to research and development, with over 35 specialised technicians guaranteeing constant product improvement. And the market certainly appreciates it: the Trieste-based company produces around 27 million kilograms of finished products every year.
A separate chapter: electronic antifouling
Here we are talking about something completely different: electronic antifouling is not a paint. No, it is an electric device that, thanks to ultrasound transducers, is able to destroy algae and other types of organisms that could threaten the hulls of boats. We are talking about a modern and technological alternative to the classic protective paints.