Winsor & Newton 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.

• Gives you more working time: Slows the drying rate of Professional Acrylics so you can blend, layer, and adjust color without rushing.
• Keeps colors true: Maintains consistent color from wet to dry, helping prevent unexpected shifts while you work.
• Supports smoother transitions: Ideal for wet-into-wet techniques, glazing, soft gradients, and detailed painting sessions.
• Mixes cleanly with acrylics: Integrates easily into Professional Acrylic paints without weakening color strength or altering finish quality.
• Reliable for studio and outdoor use: Helpful in warm, dry conditions where acrylics tend to set quickly, giving you more flexibility.
• Made by Winsor & Newton: A trusted brand known for premium artist materials.