impermeabilization
noun
im·per·me·a·bi·li·za·tion
(ˌ)imˌpərmēəˌbiləˈzāshən;
-bələ̇ˈz-,
-bəˌlīˈz-
plural -s
: the act of impermeabilizing something
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Merriam-Webster unabridged
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