i am looking for a material of any kind with the following characteristics:

-waterproof (or at least water-resistant)
-adhesive (or can be heat glued) to cotton, such as the kind on a towel
-the final product would be like a bathroom rug's nonskid/waterproof
backing. --the roll is ideally at least 55 inches wide.

i looked into some 3m tapes, especially the 471 but they are adhesive enough.

any suggestions on what materials would be suitable to this function?
what material do they use on the above mentioned bathroom rugs?

thanks