Is this waterproof for dog urine? Or does liquid go through the interlock sections?

The 1/2" Diamond Top Dog Kennel Mats are water resistant but not waterproof. The tiles do interlock very tightly but if liquid is left at the seam of the tiles for a period of time, liquid can get through. These tiles are non-porous, so no liquids will get in the tiles making them great for doggy day cares and kennels.