Crossword clue: a waterproof filler and sealant that is used in building and repair to make watertight

The most common answer is caulk (5 letters).

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

caulk 5 letters wn-def

a waterproof filler and sealant that is used in building and repair to make watertight

caulking 8 letters wn-def

a waterproof filler and sealant that is used in building and repair to make watertight