Why won't my paint stay attached to the wall?
September 10, 2011 12:03 PM Subscribe
I need to repaint a section of damaged-and-repaired sheetrock above my shower, but I can't seem to get the primer (Killz, anti-fungal and water-based) to stick. It goes on okay, but peels away at a touch.
posted by pla to Home & Garden (8 answers total) 4 users marked this as a favorite
About a year ago, a hook (like a coathook) anchored in the sheetrock above my shower (it has tile going up to about a foot below the ceiling - Why they didn't do tile all the way up, you've got me) pulled loose, leaving a 2x3" crater. I patched it with joint compound, sanded the entire general section of wall (1x4ft), and repainted it.
About a month ago, I noticed some serious mildew growing on/in the area of the original damage, and realized I had just used plain ol' interior paint (the house came with a few cans in the basement, conveniently the right color) rather than one of those anti-fungal paints. So last week I sanded it down to the sheetrock again, bleached the hell out of it to kill any mold that had ideas of living in my wall, let it dry completely (then thoroughly wiped down the surface and let it dry completely again), and put on a nice thick coat of Killz. I also put a dehumidifier (set to 50%) in the bathroom, since it normally stays damp in there for a few hours after showering in the morning.
Except... I can't get the primer to stick! Twice now, when I go to sand it a bit to put on a second coat, it just peels away in big chunks. A few patchy spots (with nothing different about them I can see) will stay attached, but the vast majority of it just rolls and peels away.
Help! What can I do to get this stupid primer to stick?
As another bit of data for anyone who might have an idea, it seems stupid to me to use a water-based paint in the bathroom, but my SO would complain about the smell for months if I used something oil or solvent based. And the Killz label claims it works just fine in damp environments (really the whole reason anyone would use it, as far as I can tell).