Sennelier masking fluid 250ml To temporarily cover spaces on a canvas, notebook or paper. Prevents the adhesion of watercolor or paint on the parts where the masking liquid has been applied. It can also be used with water-based and spray inks. Once dry, it is easily removed with your fingers. For application, preferably use old brushes. Composition: natural rubber dispersion Dries in 10 minutes. Size: 250 ml. How to use: Draw, write or use a stencil with the masking fluid. Let it dry. Use your inks or watercolors on the canvas or paper, you can paint without fear on the mask you have created. When it is dry, remove the mask with your fingers, the drawing or phrase that you have made with the previous background color will remain. If you have doubts or want to see the results step by step with this technique in Mixed Media, don't miss the tutorial How to use masking fluid.