Zinsser B-I-N Shellac White Base Primer Ultimate Stain Blocker, 1 Gallon

Looking for a “silver bullet” primer that covers everything unwanted? Use the one contractors keep in their vans: Rust-Oleum Zinsser B-I-N Primer

As the original, shellac-base primer-sealer, nothing is better at permanently blocking stains, odors and wood knots