p-Ex [UK] [trademark] [esp. US] and ANZ [trademark] Liquid Paper, [US and ANZ] whiteout [noun] [U] - a white liquid used for painting over mistakes in a piece of writingYou have to let the Tipp-Ex dry before you write over it.
TIP
Meaning of TIP in English
Cambridge English vocab. Кембриджский английский словарь. 2012