noun
oil paint; oil-based paint
Refers to paint that uses oil as a binder, as opposed to water-based paints. Often used in contexts like art supplies or home improvement.
See also: 油絵の具 (あぶらえのぐ)
油性ペンキは水で洗えないので、うすめ液が必要です。
Oil-based paint can't be washed off with water, so you need thinner.
この看板は油性ペンキで塗られています。
This sign is painted with oil-based paint.