unwettable
/ʌnˈwɛtəbəl/Definitions
1. adjective
Not able to be wetted or moistened; having a surface that repels water.
“The unwettable coating on the roof helped to prevent water from seeping in during heavy rainfall.”
2. noun
A property or characteristic of being unwettable.
“The unwettable quality of the surface made it ideal for outdoor use in rainy conditions.”