It is possible to coat paint with polyurethane. You can use water-based or oil-based polyurethane over any kind of paint as long as it’s clean and the paint is fully dried. Some polyurethanes, such as oil-based polyurethanes, can discolor.

Silky Terrier Dog Breed Playing Aro... Silky Terrier Dog Breed Playing Around

Can you polyurethane a painted floor?

Polyurethane Based on WaterAs a clear-coat for a painted floor, polyurethane provides superior protection and adhesion properties. There is a good chance that you will be able to find this product in any hardware store.

Can you seal a painted floor?

Sealing a painted floor is possible. Clear acrylic floor sealers are available from a number of manufacturers and can be used to seal concrete and asphalt surfaces. Acrylic’s strong adhesive properties allow them to adhere well to previously painted surfaces, and they dry to a semi-gloss sheen when used over them.

Should you polyurethane over paint?

Protecting freshly painted surfaces with one or two coats of polyurethane is a good idea. If you’re concerned about yellowing, use a water-based product instead of an oil-based one. A smoother finish can be achieved with oil-based polyurethane, but it takes several hours longer to dry.

Can you put polyurethane over white paint?

Applying polyurethane to paint is possible. In order to use water-based or oil-based polyurethane over any paint, it must be completely dry and free of any contaminants. Even when using polyurethanes based on oil, it is important to watch out for discoloration.