Dr. Ph. Martin’s Frisket Mask Liquid is a helpful tool for both beginner level and advanced artists. This latex-based product allows for protection of the working surface to give added control as the artist works with different mediums. Specially designed for use on watercolor papers, as well as a variety of other surfaces. This liquid frisket allows for blocking or layered applications, and then is easily removed by peeling or with a soft eraser. Comes in a 1.0 oz (30 ml) glass bottle with dropper.