Pebeo Synthetic Drawing Gum is a latex free masking fluid, which can be applied to a surface to mask areas where colour is not desired.The new synthetic formulation contains no latex, and may be applied with a brush or applicator bottle. Apply to all shades of paper, allowing 10-15 minutes drying, before colour is applied. Gray tint allows for exact detail work in application, as well as easy identification for removal. Use with ink, watercolour and gouache. Water soluble when wet, but dries waterproof.