This is the only brush designed to work perfectly with Gamblin Gamvar Varnish. Get the depth of colour, the saturation of colour and precisely the gloss level you want. Easily. Every time. This brush has the correct thickness and stiffness- soft enough to contour to the texture of your work, yet stiff enough to evenly and thinly varnish your paintings. Works with Gamvar Gloss, Satin, and Matte on oil and acrylic paintings.