Professional Acrylic Medium, Slow Drying, 250 mL Bottle

Winsor & Newton’s Professional Acrylic Slow Drying Medium is designed for artists who want more time to blend, build transitions, and work wet-into-wet without sacrificing color accuracy. When mixed with Professional Acrylic paints, this medium noticeably extends open time, allowing smoother gradients, more controlled edges, and relaxed working sessions, especially helpful for detailed work, glazing, or painting in warmer environments where acrylics dry quickly. One of its most appreciated qualities is that it maintains the paint’s true color from wet to dry, preventing the shift that can sometimes occur with fast-drying acrylics. The result is consistent, predictable color performance that helps artists confidently match mixes, refine layers, and revisit areas without racing the clock. The formula remains unchanged regardless of packaging. During a label transition, some bottles may read Artists’ Acrylic instead of Professional Acrylic, but the medium inside is the exact same high-quality blend trusted by painters worldwide. This medium integrates seamlessly into studio workflows, offering extra flexibility without affecting pigment strength or film integrity.