If the urine is in an upstairs floor, you have to be certain that the smell isn't coming through the floor into the downstairs.Other than that, if it is dog urine or human urine, a really good coat of any paint should seal the smell in.

I've read on some sites that the corporate seal is not necessary or used that much in real life.

We did that twice between washings.Polyurethane sealed in whatever odor was left.I lived in that house for seven years before selling it for a sweet profit.

The income tax and later income withholding sealed the deal.Could be, but at the time of the Fed creation, we were under the Gold Standard, so the Fed couldn't just create money out of nothing, i.e., it had to be backed by gold.

Inspect roof for raised shingles, nails popping, vents sealed and in good condition, drip edge secured and facia condition being free of rot/decay.

I loved sealing doors....LOL Yes, if we had known then what we know now we would have quit the job and gone the RE path full time!

The washer and tape was disintegrated after only 1yr.I was told to use plumbers tape by people at hardware store.Plumber tape: A teflon tape is used to seal pipe threads against leaks.

I will also be sealing all the subfloors with primer.

I’m certain this will remove all surface debris, including tar, and any stains that have not penetrated too deeply.I seal everything using matt finish Behr concrete waterproofing sealer.

Then double bag the waste in heavy duty garbage bags and seal the ends.