Advantages of Dewaxed Shellac vs. Shellac with Wax

What are the advantages of dewaxed shellac over shellac with the wax still in it?

Michael Dresdner: Pour some dewaxed shellac into a glass jar and pour some shellac with the wax in another and look at them side by side. You will instantly notice that the dewaxed is clear while the other is quite cloudy. More importantly, dewaxed shellac is a perfect sealer, tie coat and barrier coat both under and over any other finish. Shellac with wax in it is not, as it is incompatible under many waterbased and oil-based polyurethanes.

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