Preserve crisp white areas in your artwork with Mont Marte Masking Fluid Premium 120 ml — a top-quality latex-based masking fluid for watercolour and fluid art that resists paint and ink while delivering clean edges. This non-staining formula, lightly tinted yellow for visibility, allows artists to see precisely where it’s applied. Once dry, paint over it freely, then peel or rub off the mask to reveal bright white space. Ideal for fine details, highlights, and negative painting techniques.