Perma-White InteriorZinsser paint review

Why it happens. The white base goes on thin and runny, and hide is its weakest attribute by a wide margin. Pros describe two coats as the floor and three as normal on white and pastel work. One retail one-star review titled "Like water" describes three coats over light beige still not fully covering. Tinted Perma-White hides fine, so this is specifically a white-base problem, not a bad batch.

The fix. Stop trying to solve it with more Perma-White. Block the old color out first with cheap white emulsion or a Bulls Eye 1-2-3 mist coat, then put two coats of Perma-White over the top. On bare plaster, budget the 1-2-3 mist coat plus three. Lay the paint on heavy with long strokes rather than spreading it thin. As one decorator puts it, do not put it on light or you will end up doing four coats.

Why it happens. This is what happens when people try to fix the coverage problem by piling the paint on. Laid on too heavy it sags, throws the odd run, and can orange-peel. Big-box reviewers describe it running out of what they thought was a thin coat. The paint wants a full wet film, but there is a line between a full coat and a wet, sagging one.

The fix. Use a medium-pile roller instead of a brush wherever you can. The runs and the ropey look both come from brushwork, and a roller lays a more even film with less effort. Load heavy, use long strokes, and stop short of a film that is visibly moving. Check the wall sideways to a light while it is still wet, because a run caught in the first few minutes takes one pass to fix and a run caught tomorrow takes sanding.

Why it happens. Self-priming does not stretch to bare plaster, fresh filler, or damaged paint. An eggshell coat rolled straight onto a newly hung bathroom ceiling cracked along the joint-compound seams. The claim on the can covers sound, previously painted interior surfaces, and new porous substrates are not that. One decorator who sanded back to bare plaster and sealed only the filler was on his fourth coat with roughly 20 percent of the patches still showing.

The fix. Mist coat the whole surface with Bulls Eye 1-2-3 before any Perma-White, not just the patches. The same walls done over a full mist coat covered in two coats instead of four. Treat bare plaster, new drywall, and fresh joint compound as a priming job regardless of what the label says. For water or rust stains, spot-prime with Zinsser Cover Stain first, then topcoat.

Why it happens. This is the single most common misread of the product. Perma-White stops mold and mildew from growing on the paint film. The mildewcide is in the dried paint, not in the wall behind it. If water is getting into the cavity, or the bathroom has no working fan and condensation never clears, mold returns behind or through the film. The paint is a film, not a moisture barrier.

The fix. Fix the cause before you open the can. Kill and clean off any existing mildew, find and repair the moisture source, and confirm the exhaust fan actually moves air. Then roll two coats. Painting over existing mildew you did not remove, or painting a room with no ventilation, are both explicitly outside what the 5-year guarantee covers.

Yes in a damp room, no as a decorator paint. At $35 to $48 a gallon it undercuts premium bath paints like Aura Bath & Spa, scrubs clean without burnishing, primes itself over old gloss, and keeps mildew off the film for 5 years. The catch is color and coverage: white to mid-tones only, two coats minimum for the guarantee, and often three over an old color. Buy it for the bathroom ceiling, the basement, and the laundry room, and use a tinted bath paint where color matters.

It stops mold and mildew from growing on the paint film for 5 years, which is the exact claim on the can. The mildewcide is in the dried paint, not in the wall behind it. If moisture or a leak is feeding mold inside the wall cavity, paint will not fix that. On a properly ventilated bathroom wall the film stays clean for years, and two coats are required for the guarantee to apply.

Four things, and they are the four situations people actually hit. Mold growing inside the wall cavity from a leak or trapped moisture is not covered. Neither is a room with no ventilation where condensation never clears. One coat instead of the required two voids it. So does painting over existing mildew you did not remove first. Kill the mildew, fix the moisture source, confirm the fan moves air, then roll two coats.

On sound interior surfaces, no. Perma-White is self-priming and bonds to glossy and previously painted surfaces, which is the point of the product. The exceptions are bare metal, raw wood that needs sealing, and any surface with active stains. For water or rust stains, spot-prime with Zinsser BIN or Cover Stain first, then topcoat. In a shower room painters lean toward Cover Stain or Bulls Eye 1-2-3 over the shellac-based BIN, which some report cracking in constant steam. Bare plaster and fresh joint compound also want a mist coat of 1-2-3 first, whatever the self-priming claim says.

Two is the floor, three is normal when you are changing color. One coat voids the mildew guarantee, so two is a rule rather than a suggestion. The white base goes on thin and runny, and one one-star reviewer describes three coats over light beige still not fully covering. If you are covering an old color, block it out with cheap white emulsion or a Bulls Eye 1-2-3 mist coat first, then two coats of Perma-White over the top.

Only off-white to mid-tones. The factory product is white, and dealers tint it into a limited light range. You cannot get a deep navy or charcoal in Perma-White. If you want a saturated bathroom color with mildew resistance, use a quality bathroom-specific wall paint in your color instead, and reserve Perma-White for the ceiling and the white trim.

Yes, and the ceiling is its strongest use. The ceiling over a shower takes the most steam and shows mildew first. Perma-White in eggshell or satin handles that better than standard ceiling flat, which has almost no scrub or mildew resistance. Roll two coats and you have solved the spot where most bathrooms fail.

Buy the sheen by room. Satin or semi-gloss for shower walls and the ceiling over a tub, where the steam is heaviest. Eggshell for drier rooms where you want less shine. Be aware that semi-gloss can pull a little ropey under a brush before it levels, so roll it wherever you can and keep brush passes short.

You are laying it on too heavy, usually while trying to fix the coverage. The paint wants a full wet film, but past that it sags, throws runs, and can orange-peel. Big-box reviewers describe it running out of what they thought was a thin coat. Use a medium-pile roller instead of a brush, long strokes loaded heavy, and stop short of a film that is visibly moving on the wall.

One gallon plus a quart for touch-ups covers a single bathroom ceiling and walls at two coats, at 300 to 400 sq ft per gallon. For a whole basement or a big laundry room, the 5-gallon pail drops the per-gallon cost and is the better buy. Add material for a third coat if you are changing color rather than repainting white over white.