Pebeo Drawing Gum is a peelable blue-grey tinted substance for the realization of artworks using ink, watercolour or gouache, as well as varnishes & fixatives. Apply using a brush or pen on the parts of the work to be masked. Colour is applied when the drawing gum is dry. Once the colours are completely dry just rub the gum with your finger or with an eraser to reveal the masked parts. Select from either 45ml or 250ml sizes, & traditional latex or synthetic (latex-free)! Pebeo Drawing Gum Tinted Masking Fluid 45Ml Or 250Ml