If the spot is small you can also try multiple layers of conventional primer and paint.
How to paint roof water stain.
Clean the stain.
When applying paint to water stains bits of old paint and plaster will typically flake off.
Apply a light coat of the stain blocking primer over the stain to cover it while avoiding dripping.
Now that your leak is fixed any mold or mildew is eliminated and the area is primed you can paint.
Now prime the stain with stain blocking primer.
Use a primer that blocks stains.
Take a putty knife or paint scraper and remove the textured area around the stain.
Your first priority when dealing with a water stain should be to find the source of the leak or in.
A primer that blocks stains is the ideal product to use to ensure the water stain is sealed and won t show up after painting.
If you don t do this then you might be able to see the stain through the new paint.
Identify and repair the root cause.
Now you can paint.
No matter how conscientious you are in maintaining your home you will inevitably discover at one time or another that a plumbing or roof leak has left a.
If your ceiling has a texture you ll find using an aerosol can easier than a paintbrush and you ll get more reliable coverage.
You need to cover the stains with primer before painting and drywall primer won t do.
Conceal an unsightly water stain on the ceiling and put a stopper on the leak that caused it with these stain fighting tips.
Cover the floor with plastic and find a good pair of goggles drips are a fact of life when painting the ceiling.
Make sure the stained area is dry otherwise the new paint and texture will not adhere and the stain will reappear.
To dry the area turn down the air conditioner to about 70 degrees for the day and apply a fan directly to the area.
4 prime the water stained area.
If the primer doesn t match the color of the ceiling you may need to paint the entire ceiling once the primer has dried.
Use shellac based stain blocking primer or an equivalent high solids latex primer.