Masterchem Industries 10007 KILZ Up Shot Sealer, 10 oz.

Wasn't sure how effective this would be to remove water spots on ceiling tile. Tried it on one tile and was very impressed. Yes, you need to be careful about spraying this onto the tile (wear safety glasses, esp if you have contacts), but if you're mindful of that, you can get excellent results in an easy to use package. Tried bleach/vinegar home solution, it didn't work. This did--spots completely covered, even ones which were pretty dark and had been there for a while. White blends in with the tile nicely as well.

works good on small areas

Perfect color match, value for money, easy to apply, bought 2 cans, did my whole ceiling in minutes, drys fast, no drips,

I was very easy to use without spraying nozzle that's the paint the ceiling almost perfect

Worked well. There was a significant amount of paint debris. I used an umbrella under while spraying. The coverage was good. Did not smell

Great product

Covers dark ceiling stains nicely. Easy to use.

Works great on any ceiling stains. Color matches standard white ceiling paint perfectly.