Great sealer for skim coated level 5 ceilings
This is absolutely the right thing for the job if you have skim coated your walls or ceilings with joint compound. After months of popcorn removal, skim coating, and sanding I was finally ready to paint my ceilings. The all-purpose joint compound left a chalky, powdery feel on the ceilings. The chalky surface would easily rub off on your fingertip and looked like it could absorb a lot of paint.
After doing some research on various painting and drywall websites, the overall opinion was that
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Zinsser Gardz was the best product for the job to seal a level 5 finished wall or ceiling.
Application was fast and easy with a short nap 9" roller. Simply load up the roller and spread across the ceiling evenly. Be liberal in application, but backroll if any runs appear.
I had over 1500 sq ft of ceiling area to paint, and 5 gallons was more than enough. After one application of Zinsser Gardz I rolled on two coats of Behr Premium Plus ceiling paint with a lower-nap 18" roller. I think a better ceiling paint with more primer may have allowed me to do fewer coats, but the paint went on evenly and did not get absorbed into the ceiling, leaving a uniform texture.