Rust-Oleum Zinsser primers—specifically products like Zinsser B-I-N Shellac-Based Primer—are frequently rated by professional painters as superior to Kilz for extreme stain blocking, odor elimination, and surface adhesion. While Kilz is an exceptional and reliable consumer choice, Zinsser's advanced shellac formulations lock in stubborn pet odors, heavy smoke damage, and severe water stains even more effectively across difficult substrates.
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