Hi, i didn't do the research as well as i thought. I put Zinser Fast Prime 2 latex on cedar and pine walls. 2 coats of latex later, I see bleed thru and the knots coming thru. I spot sprayed the knots and bleed thru with a can of shellac, primed and painted the problem areas to no avail. What do I do now?
hi, this has been about a month now. i got old cedar boards from a lumber yard that had been sitting around for years. they very dark. as i said, i put the latex primer on. let it dry for a few days, went over it with behr white latex semi and let that dry and reapplied. a few days after that, i noticed the bleed thru. sprayed the shellac on the really bad areas and painted over the next day. we are putting pine boards up for trim, i have primed them with Bin that has the shellac in it but am afraid it will bleed thru again.
So you haven't tested whether the Bin held it back, you are just afraid it hasn't , right?
Wait- I see you painted over the shellac the next day- but so far- no bleed?
Shellac (BIN is pigmented shellac) is the industry standard to hold back bleeding stains.
These are boards on the interior? Bin is best used on interior, although it can be used as a spot primer outside.
Also when you spray it is ok for small spots- but if it is an overall problem, you might want to roll on a full coat. Stinky stuff- use plenty of ventilation- but it does the trick.
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