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What's in the can.
A synthetic resin binder called alkyd is the most common oil based product. Alkyd is made with linseed or Soya bean and cleans up with mineral spirits. It works best for ceilings paint and some high traffic floor areas.
Pigments:
Adds color to the paint.
Resins:
Creates a film on the surface.
Additives:
Thickening, drying, or an anti-foam agent.
Solvents:
Prevents liquefaction prior to paint application.
Benefits:
Has excellent adhesion and is the best type of ceilings paint or when you need to coat a heavly chalkedsurface. Alkyd also goes on thicker and in most cases requires only one coat.
Drawbacks:
Oil based paints when dry can become brittle, prematurely crack, fade, and can developed a powder on its surface. They also have health and environmental concerns.
Health and the Environment.
Alkyd paints have a noticeable odor and high VOCs or volatile organic compounds. A study by John Hopkins University found that some oil base products contain 300 toxic chemicals and 150 carcinogens.
Why are volatile organic compounds bad
VOCs have been known to cause eye lung and skin irritations. Along with headaches, dizziness, nausea, respiratory difficulty muscle weakness, liver, kidney, and other problems.
Alkyds paints can be difficult to use.
Alkyd has more drag (stickiness), takes up to 48 hours to dry, attracts dirt and insects when wet, and it's harder to clean from brushes and roller cover.
Mildew.
Alkyd is made from vegetable oils giving needed food for the mildew to grow. Even with mildew sides added oil based paints have a difficult time keeping fungus away. Some people add a coat of latex over there ceilings paint so as to guarantee against mildew growth.
Can I apply latex over oil ( Alkyd ) or oil over latex.
Yes latex can be painted over oil or oil over latex. Prior to doing so a gloss or semi gloss surface must be sanded or a liquid dulling solution applied. If either of these steps are not followed the paint may not adhere properly. For example apply a coat of alkyd ceilings paint and finish it with latex
Are there percussions for alkyd paint.
Oil based paint is flammable and has potential health hazards. Alkyd should never be thrown into a land fill. It should be properly disposed according to your local government regulations.
Can I thin alkyd paint.
Thinning of alkyd paint can cause drips, sags and the probability of extra coats. However diluting alkyd by up to 25% is recommended for some paint spraying equipment.
How do I keep my paint from aging.
Paint can be kept for a minimum of two years. Be sure the lip of the paint can is clean and free of debris. Place a layer of plastic wrap over the can and then hammer down the lid. The paint should be stored upside down in a cool dry area and protected from freezing.
My paint froze what should I do.
Prolonged or repeated freezing can cause paint to separate. Even so paint can still be applied if it stirs freely when thawed.
Where should I use alkyd paint.
Alkyd works best for high traffic areas or surfaces that are frequently cleaned. Oil paints are tough and stand up better to wear and tear.
Can I use oil based paint on my new eves trough.
Alkyd should not be applied directly to galvanized metal.
Can alkyd be used on stucco or masonry etc.
Before doing so a special primer would be needed
Is oil based paint more costly than latex.
Whether your using ceilings paint or floor enamelalkyd paints are generally more expensive than latex.
In time alkyd paints will no longer be used even as ceilings paint. The majority of dollars spent by paint manufacturers for research has been earmarked for latex. If at all possible it is always best to use a latex paint.
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