Schmincke : Masking Fluid

Liquid, colourless gum emulsion for masking specific areas of your work from unwanted colour. Easily apply this masking fluid with a wooden stick, the end of a paint brush, or a masking fluid applicator, and leave to dry. Once the fluid has completely dried, you can paint over, without any worry about the surface underneath. Do not leave on your work for longer than 2 days, remove as soon as possible. Rubs off easily with your finger or eraser. Clean any equipment immediately with water and soap, and ensure the bottle is closed properly after use.