Polyurethane on top of Polycrylic

  • Advertise with us

« back to Finishing forum

Forum topic by Stahl posted 12-22-2017 04:08 PM 3971 views 0 times favorited 3 replies Add to Favorites Watch
View Stahl's profile


18 posts in 1344 days

12-22-2017 04:08 PM

Need help quickly. I made a box for a Christmas present and decided to try min wax polyclrylic to finish it, I am so not happy with the finish. Can I finish this project by spraying polyurethane over the water based polycrylic. Im still trying to learn all these different finishes and am giving myself a headache. Will the poly adhere to the water base?

3 replies so far

View TooTall17's profile


16 posts in 935 days

#1 posted 12-22-2017 04:27 PM

I’ve never done that, but it’s my understanding that as long as the polycrylic is 100% dry and cured you can go over it with the polyurethane. Probably wouldn’t be a bad idea to sand the box with some 220 grit before using the polyurethane.
What didn’t you like about the polycrylic finish? I’m just curious, I’ve always had good luck with that stuff.

View ArtMann's profile


1480 posts in 1592 days

#2 posted 12-22-2017 08:40 PM

I am not so confident that you will get good adhesion with no additional prep. At the very least, you need to sand the item with 220 or 320 sandpaper to give the polyurethane something to grip. Others will advise you to spray with shellac first because it is a good material for transitions of the sort you want. I won’t recommend it because I haven’t personally tried it.

View John Smith's profile

John Smith

2440 posts in 939 days

#3 posted 12-22-2017 11:12 PM

if you google the question, the consensus comes back as
yes – if the polycrylic is over 4 days old and cured properly.
can you mask off a 2” area in a nonconspicuous area to try it ?

do you have some similar wood to practice on ?
call the customer service number on the can of PolyCrylic.
I know that Christmas is within hours and this may be a timing issue for everyone.

-- there is no educational alternative to having a front row seat in the School of Hard Knocks. --

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics