With Sennelier’s Masking Fluid Drawing Gum, masking watercolours in detail is now easier than ever! Masking Fluid isolates background areas by creating barriers against moisture, ensuring that watercolour, ink, or gouache aren’t easily absorbed. It can be applied with a brush or nib, and is slightly tinted blue to differentiate from white backgrounds. Just remember to let it dry for two to three minutes before applying colours. After it dries, it can be peeled or rubbed off surfaces.

This handy tube applicator can save your brushes. At 36.9 ml (1.25 fl oz), this bottle of thin formula masking fluid will certainly last, especially considering that its .5 mm applicator opening can lay down the perfect amount. If that weren’t enough, the pin-cap keeps the opening block-free!

• 36.9ml bottle with fine tip applicator