How many letters does the top answer for “not capable of absorbing or soaking up (liquids)” have?

The most common answer is nonabsorbent (12 letters).

Crossword clue: not capable of absorbing or soaking up (liquids)

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

nonabsorbent 12 letters wn-def

not capable of absorbing or soaking up (liquids)

nonabsorptive 13 letters wn-def

not capable of absorbing or soaking up (liquids)