Water-based Paint For Cars :
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Expert Advice On Water-based Paint For Cars From Eastwood
Water-based paints are the future of automotive coatings. The near future. All automotive paint manufacturers are working on this technology and many have already released water-based products into both the O.E.M. and refinish markets. The transition from solvent-based paints such as urethanes to water-based is not a difficult one. Although there are differences, there are many similarities between water-based and solvent-based paints.
Both technologies are the same in their core composition. Each are composed of a pigment for color and a binder for a film. The pigments used are often the exact same, allowing water-based paints to have the same light fastness and color options as a solvent-based paint. The binders, while chemically different, are both forms of an acrylic and each are made specifically for exterior uses, giving water-based paints the durability necessary for an automotive coating. The key element which separates the two is the carrying agent, that is what is used to bring the pigment and binder from the gun to the substrate.
Solvent-based paints use solvent which rapidly dissipates from the surface for chemically controlled time windows whereas water-based uses water which evaporates at a slower rate dependant upon temperature, humidity and air flow. The cost of the solvent-based paintjobs quicker cure times are the noxious release of fumes into the air which water-based does not. However, as water-based paints continue to evolve, mild co-solvent reducers and additives are being introduced to improve performance and drying times. While not as severe as solvent-based paints, there is a slight release of a noxious element when such reducers are used with water-based paints. This is why it's important to always use proper respiratory protection when painting with any type of paint.
Water-based and solvent-based paints are most often very compatible. Urethane primers, paints and clears work perfectly well with water-based paints. Some water-based systems, such as Auto Air Colors, depend upon using a urethane primer and clear along with its paint for a complete finish. The key behind the compatibility is that water-based paints are non-reactive and able to accept and bond with any type of solvent provided the content of the solvent is not too harsh or volatile. Urethane paints, modern lacquer with lower V.O.C. contents work well. Some enamels and lacquers are have too harsh a solvent for compatibility with water-based and will degrade its composition. A test panel is advisable if a product's use and compatibility is not recommended by the manufacturer.
Water-based primers and paints are not a new technology for automotive coatings. They've been around for almost 15 years. Their increased exposure is new and development has been sped up to meet with increasingly demanding environmental compliance. Water-based top coat clear technology has not developed to the point where it is a suitable replacement for urethane clears. Fortunately, the two are compatible and when used properly, a beautiful finish is possible in which the V.O.C. exposure is significantly reduced while no compromise is made in the quality of the finish.
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