Alright DIYers and professional painters, listen up - this Rust-Oleum Zinsser B-I-N primer is basically the secret weapon that contractors keep in their vans for a reason. This stuff is the original pigmented shellac-based primer and sealer, and let me tell you, nothing blocks stains better. We're talking permanent protection against water stains, ink, smoke damage, you name it. Got those annoying wood knots or sap streaks that always bleed through? B-I-N seals them shut forever. But here's where it gets really impressive - it actually seals odors too. Pet smells, smoke odors, musty smells - this primer locks them in so they don't come back to haunt you. The 13 oz aerosol spray makes application super easy, whether you're working on interior walls or doing spot exterior touch-ups. It works great under any top coat you want to use afterward - latex, oil-based, whatever you prefer. This is that 'silver bullet' solution for all those painting problems that make you want to pull your hair out. Seriously, if you've got a surface with stains or odors that you're worried will show through your fresh paint job, this primer is your solution. It dries pretty quickly too, so you can get your painting project done without waiting forever between coats. Trust me, this is one of those products that's worth its weight in gold when you need serious stain blocking power.