Use a water based product if youre concerned about color because it wont yellow as much as an oil based one. Water based polyurethane has a slick finish which looks keeps other products from adhering to it.
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Water based polyurethane over paint. How to apply polyurethane over paint. Oil based polyurethane levels out to a smoother finish although it takes several hours longer to dry. Stain finishes sealers.
Also lower sheen paints are easier to bond things on top of. How to use oilbased polyurethane over waterbased polyurethane. For use water based poly over latex make sure the surface is fully dry and free of dust it helps the polyurethane adhere better.
Assuming you want the paint color under the finish to remain visible and unaltered choose a water based polyurethane for your project. You can apply polyurethane over any type of paint as long as its clean and has been properly prepared. If you want to avoid a similar outcome.
Water based polyurethane is essentially a plastic coating. However oil based polyurethane tends to yellow as it ages whereas water based varieties stay transparent. Both oil and water based polyurethane can be applied to latexacrylic paint.
Interior stains finishes. If you already laid down a wat. Unfortunately when many do it yourselfers apply polyurethane over a water based latex or acrylic paint they end up with rampant flaking.
With proper preparation you can paint over water based polyurethane. However oil based polyurethane will create a yellow or amber hue especially to light colors. As you are using water based polyurethane so cover any air vents or ducts in the room to minimize dust in the air.
Before applying the second coat the first coat must be dry. Find quality polyurethanes online or in store. You could use a water based poly over wall paint but it will not offer better protection and durability than a waterborne enamel the labor and material cost would be more to do two coats of wall paint then 3 or four coats of waterbased poly id suggest doing two coats of waterborne enamel and being done with it.
Polyurethane can be oil or water based and you can use either kind over latex paint. Luckily there are ways around this when it comes to applying finishes. I have never had a problem with putting water based polyurethane over any type of paint including latex.
How to polyurethane over water based paint. A polyurethane finish can prolong the life of paint and prevent ultra violet rays from causing it to fade. Oil and water are famous for repelling one another and not mixing.
It is quit time consuming method. To add durability without affected color use a water based finish. To prepare the polyurethane to accept paint first wash it down with a grease cutting detergent and water and dry it well.
Next scuff the polyurethane surface with sand paper.
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