Is it necessary to use Pro Sealer every time I finish a wood floor?

General Finishes Pro Image Topcoat or Pro Shield Topcoat can be applied directly to the stain without a sealer.

In cases of species like White Oak top coats can pull tannin from the wood leaving an undesirable color affect. Many closed grain woods such as maple, walnut, and cherry may only require one seal coat and two finish coats. Most open grain woods such as the oaks and ash will need two seal coats to increase the build of the finish and improve the final result. If in doubt, put down a coat of sealer.