Latex paints will not stick to oil based paints. The exception is that an oil based primer may accept any kind of top coat paint. For that reason, an oil based primer is recommended to be applied over any oil based top coat, then a water based paint may be used as a top coat.
No special prep is needed for oil over water just the basic required for every job. The reverse however is not true. Oil based paint must be primed with an oil based primer before painting on latex.
You can't just paint directly over oil-based paint. Glossy surfaces will not take a second layer of paint well on their own. They need proper cleaning and priming. You can achieve that with the following steps.
You can use a water based primer over oil base paint as long as you sand the oil base paint down first to allow the water based primer to stick to the surface!
Use on interior and exterior surfaces including woodwork, drywall, plaster, paneling, masonry, brick, painted metal and properly prepared glossy surfaces†. Use under or over water-based or oil-based paints. Not recommended on flooring.
The most common issues when painting oil over latex (and vice versa) include peeling, blistering, and an overall poor finish.
Firstly, when painting with oils, it is important to adhere to the three rules of oil painting. These are 'fat over lean', 'thick over thin' and 'slow-drying over fast-drying'. This means that each layer of paint should be progressively more flexible, thicker and slow drying than the one below it.
You cannot mix water- and oil-based products together.
They are Sherwin Williams Extreme Bond Primer, and Behr Bonding Primer. These top two primers were the very best at bonding in both the 24 hour test and the 38 day test.
It is specially formulated to bond to a variety of challenging substrates and reduces the need for sanding dense and glossy surfaces – making it an ideal primer choice for painting tile, glass, Kynar®, and vinyl. This water-based formula has a quick dry time and can be used under Alkyd, Oil, and Water-based topcoats.
Most projects where you're going over a previously-painted surface do not require the use of a primer. In many cases all you'll need to do is spot-prime any bare areas that need to be addressed before applying your finish.
Do I have water-based or oil-based paint in my house? The test to determine whether your paint is oil-based or water-based is pretty easy. Simply put some methylated spirits on a rag and wipe at a small section of your wall. If the cloth is stained with the wall colour, it is water-based.
Water based primers - These primers tend to be sometimes easier to use than shellac and oil-based primers, they also have less odours and are environmentally friendly.
Painting is a popular and rewarding way to spruce up a room or outdoor space, but the fumes from oil-based paint primer can be dangerous. Some of the paint fumes' side effects include headaches, dizziness, nausea, and even more severe health problems.
KILZ Original 1 Qt. Oil-Based White Primer, Sealer and Stain Blocker is suitable for application on most interior surfaces such as furniture, drywall, plaster, woodwork, paneling, wallpaper, masonry, brick, painted metal and properly prepared glossy surfaces.
Shellac Primers - These primers can be used with both oil-based and latex paints and may be the best at blocking stains and can even seal in smells that may be coming from the surface you are painting. They are fast-drying and can adhere to almost any surface.
The glossy surface of oil-based paints makes it so difficult for any other paint to bond. That's why, if you apply water-based paint straight to oil-based, it will flake and crack as the water-based paint pulls away. So, to get oil-based ready to paint over, you need to take away a lot of that gloss.
Water-based primers work well on ceilings, interior walls, and exterior surfaces for new projects. On the other hand, oil-based primers offer better performance on surfaces that require more durability and stain-blocking capabilities.
There are three rules to follow when painting in oils because colours dry at different rates: 'fat over lean', 'slow over fast' and 'thick over thin'.
When painting over oil based paints, only an oil based paint may be used. Otherwise, the paint will peel off or blister off. The reason is that the government is not allowing oil based top coat paint from being sold on the standard market.
The advantage of the slow-drying quality of oil paint is that an artist can develop a painting gradually, making changes or corrections if necessary. Oil paints blend well with each other, making subtle variations of colour possible as well as more easily creating details of light and shadow.
It is recommended you always use a primer before embarking on a painting job. For best results use an oil-based primer if your top coat is oil based paint, or latex based primer if your top coat is latex-based paint.
If you have various stains, shellac Bonding primer is the ideal choice. It can be used to cover rough surfaces and old varnish as well as metal and ceramic.
Latex-based Primer
They are more flexible and fast drying, and are less brittle than oil-based primers, making them less susceptible to peeling and cracking. They are also good for priming soft wood (such as pine), brick and concrete and galvanized metals.