I use PUL to make large washable potty pads for dogs. I run an Italian greyhound rescue, and they will do just about anything to avoid going outside in inclement or cold weather.
Joann's PUL fabric is often printed BACKWARD. The outside of the fabric should be soft, not plasticky, and Joann's frequently has the plasticky side out. You can find it also online, and on places like etsy.