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Old 09-02-2009, 01:51 AM   #1
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polyurethane over lacquer?????


Help please! We just completed our hardwood floors but used lacquer instead of polyurethane. That was what the 'GUY' at the rental area said to use...Never thought to read the directions that said "NOT RECOMMENDED FOR FLOOR". I know, thats what I deserve for being that dumb, but now that we have put on the four coats of lacquer, would it be a good idea to lightly sand it and just add several coats of poli over it to make a better floor?

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Old 09-02-2009, 06:50 AM   #2
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polyurethane over lacquer?????


Definately not the norm, but I doubt it would be a real problem either. A lot of old floors were finished with shellac, which is not any harder than laquer & they've held up for decades. Just be sure to abrade the floor good with a sandscreen before giving it a couple coats of a floor poly. I'm betting you'll be fine. If it don't work well, what ya got to loose, a little time & a couple gallon of poly. Better than the alternative of resanding, right?

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Old 09-02-2009, 08:35 AM   #3
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polyurethane over lacquer?????


i'd recommend testing a small unseen area to be sure it doesn't bubble or do other funky stuff before doing the whole thing.
if you sand first, be sure to vacuum, then damp-dust to remove all residue before adding poly.
from my experience, poly over lacquer is ok, but not the reverse. usually, lacquer will 'bubble up' on poly.

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Old 09-02-2009, 01:36 PM   #4
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polyurethane over lacquer?????


Quote:
Originally Posted by DangerMouse View Post
from my experience, poly over lacquer is ok, but not the reverse. usually, lacquer will 'bubble up' on poly.

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Your experience is spot on. Sometimes I run trim or finish other wood that has a poly top coat. To speed up the process, I've been known to give 1-2 coats of laquer before top coating with poly.
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Old 09-05-2009, 02:16 PM   #5
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polyurethane over lacquer?????


Thanks, Ill try it on an hidden area and see how it goes.
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Old 09-07-2009, 11:18 AM   #6
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polyurethane over lacquer?????


all that is of concern is that both the lacquer and the poly or both oil or both water based. Do not mix the two.

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