Winsor & Newton Permanent Masking Medium

Winsor & Newton Permanent Masking Medium

Winsor & Newton Permanent Masking Medium is a specialised watercolour resist designed to preserve fine details, highlights, and areas of paper that must remain untouched by colour. Unlike traditional masking fluid, this medium is permanent — once applied and dry, it cannot be removed, making it ideal for intricate work and long‑term stability.

Mix it directly with watercolour to create permanently masked strokes, or apply it to the paper before painting to block out areas that must stay white. It dries clear and maintains the texture of the paper, allowing artists to build layers around protected details without lifting or disturbing them.

Perfect for botanical artists, illustrators, and watercolourists who rely on precision and crisp, controlled highlights.

Key Features

• Creates a permanent resist that cannot be removed

• Preserves highlights, fine lines, and detailed areas

• Can be mixed with watercolour for masked strokes

• Dries clear without altering paper texture

• Ideal for layered and detailed watercolour techniques

• Prevents colour from staining protected areas

Ideal For

• Preserving tiny highlights in botanical or wildlife painting

• Protecting fine linework, whiskers, veins, or sparkles

• Creating crisp edges and detailed resist effects

• Artists who need a non‑removable masking solution

• Watercolourists who build multiple transparent layers

• Illustrators who require precise, controlled white space