Top - quality oil - based paints have excellent adhesion characteristics, which means they get a tight grip on the surface being painted. And good adhesion is essential for a durable paint job. However, oil-based coatings do tend to oxidize and get brittle over time, which can lead to cracking problems in exterior applications, and yellowing and chipping problems in interior applications. They are still your best choice in two circumstances:
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When repainting exterior surfaces with heavy “chalking” (chalk is the powdery substance that comes off on your hand when you run it across the surface)
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When repainting any exterior or interior surface that has four or more layers of old oil - based paint (the number of layers can often be determined by removing some paint chips and examining them).
There are also circumstances in which you should never apply oil-based or alkyd paints. For example, they should not be applied directly to fresh masonry, nor to galvanized iron. In either case, the result will probably be a quick failure of the paint.
If you decide to use oil-based coatings, be aware that they are more difficult to apply and clean up than latex paints. They also take longer to dry sometimes 24 hours or more so you cannot apply a second coat as quickly as you can with latex paint.
CHARACTERISTICS OF LATEX PAINTS:
Prior to 1950, in USA, almost architectural coatings was oil - based paint. By 1975 – just 25 years later, and before any regulation of paint – almost 75 percent of architectural coatings had been converted to water-based (latex) versions. Today, that’s up to 85-90 percent. Water-based paints present less of a fire and safety hazard, have lower odor and air quality impacts, and are easier to use and clean up.
Water - based latex paints are popular with do - it - yourselves and professional painters because of their easy cleanup with plain soap and water. Today’s quality latex paints based on the latest polymer technology offer significant performance advantages as well.
Compared to oil-based paints, top-quality exterior latex paints have greater durability in the form of better color retention and chalk resistance, so they continue to look good for years. Since they do not tend to get brittle as oil-based paints do, they have better resistance to cracking. Latex paints also dry much faster than oil-based paints (typically in one to six hours), which allows you to quickly apply a second coat.
It has been tested for more than 50 years, show that top quality 100% acrylic latex paints are excellent choice when painting any of the following exterior surfaces:
TOP-QUALITY PAINT:
The importance of paint quality
Regardless of the type of paint you will use, one of the most important factors in the ultimate success of any paint job is the quality of the paint used. You should use the highest quality paint to get the best paint performance.
How do you identify top-quality paint?
Purchasing the best paint within your favorite manufacturer’s line of products is the simplest and best way to identify quality paint. More costly paints typically contain a higher percentage of better quality ingredients that are critical to superior paint performance.
Ingredients of paints
Top-quality paints outperform ordinary grades of paint in several ways:
· Better durability;
· Better hiding characteristics’
· Easier application;
· More uniform color and sheen, and they maintain their original color and sheen better.
· Higher levels of additives for example, more mildewcide to help keep unsightly mildew in check.
