Do You Need To Sand Between Coats Of Water-Based Polyurethane?

There are differing opinions on this subject, but the labels of most water-based polyurethane products will recommend sanding between coats. Once the first coat has dried fully, you should take some very fine-grit sandpaper and give the surface a little rubbing. This is meant to provide a little bit of traction that helps the next layer to adhere.

The important thing to remember here is that you don’t remove any more material than necessary. A single coat of polyurethane is not very thick, and it doesn’t take a lot of effort to sand through to the bare wood. This danger is especially present when doing the first coating. Use light strokes and fine sandpaper to ensure you don’t go too far.

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William Stewart

The proud owner and lead writer of WoodImprove.com. Started writing in 2018 and sharing his love and passion for wood treatments and crafts.

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