antifouling

/AE1 N T IY0 F AW1 L IH0 NG/
noun
  1. 1

    Any substance that prevents or counteracts the buildup of barnacles and other deposits on undersea surfaces such as those of boats.

adjective
  1. 1

    That prevents or counteracts the buildup of barnacles and other deposits on undersea surfaces such as those of boats.

Source: https://en.wiktionary.org/wiki/antifouling