If your drywall has been painted before it is possible to get away with using a paint with a primer added to it.
Can you use drywall primer on painted walls.
Before you apply those however you need to seal the.
Improves the glide and spread of top coat.
Unfortunately it doesn t stick well to gloss or semi gloss paint.
This will work best if you are keeping a similar paint sheen and color to what is already on the walls.
The solution to those minor imperfections is a high build drywall primer sealer.
If it is a pva primer then i d suggest you go ahead and purchase kilz for this project.
This means that after you apply the primer you can use a sanding pole like my favorite the radius 360 sanding disc to smooth out the walls to a perfect finish before you apply the topcoat.
Painted drywall drywall compound usually will adhere to a surface painted with a flat or dull paint.
If you have ever looked at a painted wall from a sharp angle and seen the finished joints show through this is an effect called joint banding or flashing.
If you re making a big change in color though play it safe by applying a separate primer.
After you re done hanging drywall and all the seams are taped and finished you need two coats of paint to give the wall its final appearance.
A drywall primer allows for easy sanding drywall primers are made to be sanded easier than topcoat paints.
If the drywall primer is something like kilz or zinser you can go ahead and use it.
A coat of primer provides the necessary adhesion and another one.
If you re an ace drywall finisher and your walls are perfectly smooth you can use a standard drywall primer sealer.
Primer equalizes porosity drywall primer soaks into the paper scuffed paper and mud the areas of differing porosity and creates a uniform surface to which the finish paint can adhere.
Once the drywall has gone up the joints taped and the screws mudded something is needed to create an even solid surface over those different textures for a smooth coat of paint and possibly to help blend in new drywall with an existing wall.
However a glossy paint enamel or paint intended to repel moisture such as bathroom paint may not hold the compound as securely.
This means that your first coat of paint can actually be absorbed into the drywall making it act more like a primer than paint.
You use drywall joint compound for almost all drywall repairs.