QUESTIONI had the grout of my tile floors professionally cleaned and sealed. I have small dogs. Where they accidentally urinate the sealant is coming off. Do you know of a sealing product that can withstand urine?
ANSWERANSWER - I assume you are saying that you seal your tile with a sealer and that your dog's urine is causing the sealer to be removed.
Sealers are meant to minimize the chances of the tile or grout to stain. The sealer should cause the urine to bead up and not readily absorb into the tile or grout. If the urine is cleaned up right away it should not stain or etch the tile or grout. Urine is acidic so if left too long on the floor it could degrade the sealer.
As long as water or urine beads up on the floor and grout and doesn't leave a wet spot after it is wiped up then the sealer is doing its job. If that doesn't happen then it is time to reseal the floor.
There is traffic grade sealant caulking that can be used in grout joints that are chemical resistant, but you have to remove the grout and that would not do anything for the tile itself.