ZinsserB-i-n Primer Sealer Spray, 13 Oz (Pack of 6) 6

This is the best primer. Stain blocker.Great for so many jobs.Really stops the stains from bleeding back through.

Used for fire clean up. Worked great.

I liked the quick coverage but it didn't produce a smooth finish. :(

I bought this spray primer at the recommendation of our local paint store, not Amazon. We are painting a 5x7 bath and needed a small amount of primer. It did not go well. The one can covers 9-12 sq ft, which is not nearly enough for this small area. The coverage is terrible (see photo). The paint isn't smooth when dry. The aerosolized paint hangs in the air and settles on everything (see photo).To aerosolize the primer, it's mixed with acetone and ethanol and uses LPG as the aerosol. With an N95 respirator, I could still taste the fumes.So maybe if you need to paint behind a radiator or something tight, you might be able to use this stuff, but for anything else, get a can of primer and a brush.