Winsor & Newton Watercolour Art Masking Fluid is a liquid with added pigmentation for masking areas of work needing protection when colour is applied in broad washes. It is composed of rubber latex and pigment.

For best results remove as soon as possible after application. Brushes can be cleaned if washed immediately with water after use. Sections treated with Art Masking Fluid must be allowed to dry before overpainting. Once dry these areas remain protected and cannot be penetrated by colour.