There is a good chance that you’ve heard all your experience that oil-based paints are not able to be mixed with different types of paint. However, you may be told that you can apply latex paint in conjunction with the oil-based primer. Both of these are true, but they might initially sound confusing. Once they’re dissected, are much simpler than they seem.
Why Oil Paints aren’t compatible
Oil-based paints have been in use for centuries. And despite many innovations, some aspects have remained a prominent part of the world of art. One of them is the fact that oil paints require an extended time to dry. Modern oil paints are quicker, but they dry in a different way than acrylics or latex.
Additionally should you apply oil paint to latex, it can expand and shrink at a slower speed than the layer underneath which causes it to crack. Latex is not able to stick when it is applied directly over an oil-based layer, without preparation and can easily crack or peel.
Utilizing Latex on an oil-based primer
There are many benefits to using latex paint instead of an oil primer. the results provide a sturdy and long-lasting surface. In general the use of latex primers is for soft and drywall but there are some notable instances. Paints and oil primers require longer drying times and require airflow, so a mix of latex and oil may minimize discomfort and time, without sacrificing strength.
Why you should choose an oil-based Primer
While certain brands of primer are designed to work with latex and oil paints. There are situations that an oil-based primer will be more effective than one made of latex. Examples of this include:
- Unfinished or varnished wood
- wood that is prone to bleeding tannins such as cedar and redwood
- painting over chalky or damaged paint
- wood that has been badly weathered
- Bathrooms are damp, for example.
- You can tint it in the paint store if you are using light or dark shades
How to determine if your walls have Oil-Based Paint
There are some essential steps to take when you are trying to apply latex paint to an existing wall. The most important of which is to determine whether or not you’ll be painting over oil paint. In order to prepare for painting, you must follow this procedure:
- Take a look at the wall. Oil is shiny and smooth, whereas latex tends to be matte , and is more rubbery in its finish.
- Swirl a cotton ball or cotton swab into Acetone and then test the paint surface. The latex will disintegrate slightly, while the oil remains unaffected.
- If you’ve concluded that the current paint is oil-based, then you’ll have to roughen the surface with sandpaper of 100-grit until the gloss is gone Then clean the surface and let drying. Then, you will be able to apply the primer for bonding.
Applying Latex on top of the Oil Primer
The primers made of oil require at least 8 hours for drying. It is possible to sand the primer on smooth surfaces of wood using 180-grit sandpaper for an easier surface to bond. Make sure you wash off any dust that was created by the sanding, and then allow the surface to dry prior to adding the paint. In general two layers evenly applied of latex paint are needed over your primer. Give the time between 2 and 4 hours to allow each coat to fully dry.
A room should take around 16 hours to dry in between two coats of primer. This is not including the drying time following cleaning or the time needed to complete the painting. But, you can divide the project into several days, provided that the project completes within two weeks after the application of the primer.