Possible Results:
había impermeabilizado
-I had waterproofed
Past perfectyoconjugation ofimpermeabilizar.
había impermeabilizado
-he/she/you had waterproofed
Past perfectél/ella/ustedconjugation ofimpermeabilizar.

impermeabilizar

TRANSITIVE VERB
(to make impervious)-to waterproof
Synonyms for impermeabilizar
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to cast a spell on