Should I Use Sealer Before Paint?

For most paint jobs, you should prime or seal the surface first to create a smooth base for paint. Primers and sealers provide an extra measure of assurance that the paint you use will adhere to its surface.

Do I need a sealer before painting?

If you're going to paint over a porous substrate, we advise you to use a sealer if you want to make your painting job a hassle-free experience. Other uses of sealers can be to seal and retain any waxes in the substrate and protect the painted surface from staining.

Can I paint over sealer?

Paint can be applied to water sealers, but the drying time of the sealer itself is the most important part of this task. ... Use either a latex-based or an oil-based primer as your first coat of paint before applying the finishing coat.