I have to pull up an area of carpet that has a urine smell. I’m also thinking of sealing the plywood sub floor after removing the carpet. Planning to use Zinsser Bin. Has anyone ever used this product to seal in a pet urine smell? What were the results? --24.147.xx.xxx

I'd soak it a few times with Nature's Miracle: Urine Destroyer first or replace the OSB. --50.32.xxx.xx

With a bad cat smell I used that to paint the floor and then nailed down luan and then tiled and then carpet. it was that bad. --173.61.xxx.xx

Get the cat version of nature's miracle in the red jug. --99.203.xx.xxx

For small local areas I've sanded then used Zinsser successfully, also used wood sealer. However, if the area is large or deep into the wood it isn't enough. I've had to rip the wood out to get rid of the smell. --71.112.xxx.xxx

If it is cats, blacklight the walls, too, because they will urinate on the baseboards. The smell might be coming from more than the floor. --98.146.xxx.xxx

I read yesterday that a one to one solution of white vinegar will take out ammonia smells since the ammonia is basic and the vinegar is acid they cancel each other out. The article did not say what weird organic compounds are made in the process. --173.61.xxx.xx

Also good idea to use odor-it or similar first, to minimize it. And good point about walls / baseboards, too --68.10.xxx.x

Pet stores have an enzyme product that might work. I’d try that as well as a ozone machine, unless your planning to toss the flooring --66.30.xx.xx

Kilz Original Oil primer worked wonders for me on a cat urine infected plywood subfloor, baseboard molding, and lower portion of the sheetrock. --71.212.xxx.xxx

I have bleached the crap out of a floor before sealing it - if you do that make sure you have the windows open as the gas will chock you. --24.101.xxx.xx

BIN is made with shellac. That's what makes it so great for sealing in odors.(And so expensive!) --73.110.xx.xx

Wanted to thank everyone for the feedback on this post. I ended up removing a small section of carpet in an entry way and then washing the subfloor with a bleach/water solution. Then I hit it with two coats of Zinsser Bin. The odor issue also extended onto the bottom few stairs. I didn’t want to pull out the carpet on the stairs, so based on the suggestions above I tried Natures Miracle Pet Urine Destroyer. That’s a great product—worked excellent! So the odor issue is resolved now based on the above process. Thanks again for the suggestions. --24.147.xx.xxx