Are any of your rug pads waterproof? Will they mold or mildew over time?

All of our rug pads can sustain some level of water exposure without harming performance. However, the only pads that contain spill proof moisture barriers that will prevent liquids from reaching your floors are SpillTech, Anchor Grip and Cloud Comfort rug pads. These will preventing pet urine or spills from reaching your floors.