Apply colour across the page while keeping areas clean with our Masking Fluid 120ml. This paint resisting medium acts as a mask to keep watercolour paper white. Plus, it has a non-staining formula with a slight yellow tint, so you can see exactly where you’re going with it. Once the masking medium is dry and you’re finished painting over it, peel or erase to reveal the crisp edges and clean white paper underneath. Grab some watercolour masking medium to make things easier during your next creative session.