Did you stir the Kilz frequently? *Make sure it is mixed well. *I've
never had any fail - used in four houses.

I'm in the desert. We built a roof over the patio. I painted the new
fascia trim and ends of the beam (exposed) with Kiltz water-based.

It sat through several or more summers before I finally painted the
wood. *Scuffed it up with some sand paper and the paint went down.

I've covered "red children's drawings" on walls. Couple coats - done.

We had some serious ice dam issues last year so they were water spots.
This happens every few years depending on how much snow we get and
when. I've always used the oil-based spray cans (Kilz or Zinsser) and
they cover like magic. I expect the problem was trying to cover water
spots with a water-based sealer.

I contacted the Kilz people and they offered to replace my quart of
the latex with a gallon of the oil, but it wasn't worth jumping
through all their hoops (pictures of the can, the spots and receipts,
etc). I did find an old spray can of Kilz in the basement and it
covered in one coat. I suspect that any brand of latex sealer may have
trouble with water spots. I'll stick with oil in the future.

dss