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Old 12-04-2009, 12:25 AM   #1
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Polyurethane not cureing


I have touched up the wood cabinetry in my bathroom consisting of framed mirrors and have applied polyurethane. I have used it before with good success. But this time it has dried on the surfaces and on the upper sides of the trim surrounding the mirrors but not on the sides at the bottom. Here it is still tacky after 3 days. Can anyone tell me why.

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Old 12-04-2009, 07:01 AM   #2
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Polyurethane not cureing


There is something in the underlying finish or surface that reacted with the poly. Give it some more time, if it does not cure, you will have to strip it and start over.

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Old 12-04-2009, 09:14 AM   #3
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Polyurethane not cureing


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Originally Posted by Just Bill View Post
There is something in the underlying finish or surface that reacted with the poly. Give it some more time, if it does not cure, you will have to strip it and start over.
Agree. Sounds like there may be wax on it. Try wiping it down with a mineral spirits dampened rag to wipe off the residue.
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Old 12-04-2009, 10:16 AM   #4
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Polyurethane not cureing


in the bath, it could likely be soapscum or cleaner residue as well as possibly wax.
always thoroughly clean any surface to be painted. scuff sand if needed, primer and paint.

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Old 12-04-2009, 12:40 PM   #5
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Polyurethane not cureing


Thanks for all the info. I'll see what I can do with it now.
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Old 12-05-2009, 07:34 AM   #6
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Polyurethane not cureing


Poly will lift lacquer-I don't know if this is your situation--If some hardened but not all-I agree with the others--Probably the surface was contaminated with crud.-MIKE-

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