Start your watercolour off with a papered accompaniment with Winsor & Newtons Colourless Art Masking Fluid! Become an artistic trailblazer with a paper medium that doesnt colour your work before you even start. When your work needs a broad wash, there may be some aspects that you may not wish to paint over the rubber latex that bubbles about in the art masking fluid covers these areas away from your brush, leaving you with the freedom & the confidence to colour your image with complete confidence. Colourless for painting freedom.75ml bottle. Masks areas of choice away from broad washes. Comes off easily under the tap. Winsor & Newton Colourless Art Masking Fluid 75ml