e difference between Kilz original and Kilz Max?Besides the price

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Kilz original was formulated originally as a stain blocker as a base for painting. Kilz Max was formulated as a stain,odor shellac to seal stains in. There are only two ways to effectively deal with pet odors. tear out things down to floor boards and studs or use the best odor blocker to seal it in. And I doo mean seal it in. you NEVER get it all our.