Is coated paper hard? What kind of coated paper can be waterproof?

Coated paper is a little harder than ordinary copy paper, but not much harder. One or both sides of the paper look slippery and white, and feel pink and slippery. Mainly used for printing, and the sliding surface is the printing surface. As far as I know, there seems to be no waterproof coated paper, and even if there is, the surface has been specially treated.