Used with Restoration Shop AU Series Acrylic Urethane paints and universally with many other urethane paints 1 Half Pint (8 Ounces)Acrylic Urethane Hardener Only - One Half Pint is required for 1 quart of AU series Color Restoration Shop AU4001 Urethane Hardener - 1 Half Pint Can (8 Ounces) Unlock professional-grade results for your automotive refinishing projects with the Restoration Shop AU4001 Urethane Hardener, specially formulated for use with Restoration Shop AU Series Acrylic Urethane Paint Colors. This premium-performance hardener is designed to activate and enhance the durability, gloss, and chemical resistance of urethane-based topcoats, making it an essential component for collision repair professionals, custom car builders, restoration specialists, and automotive DIYers seeking a factory-quality finish. Each half pint (8 ounces) of AU4001 Urethane Hardener is precision-engineered for compatibility with Restoration Shop’s high-quality acrylic urethane paint line, offering a reliable 4:1 mixing ratio (4 parts paint to 1 part hardener). This ensures proper curing, excellent flow, smooth application, and a high-gloss, long-lasting finish that resists chipping, UV fading, and environmental contaminants. Whether you're applying a solid color or a custom finish, AU4001 delivers consistent performance you can count on. AU4001 is a medium temperature hardener, ideal for shop conditions ranging between 70°F to 85°F. It provides ample working time and a predictable flash time, making it versatile across a variety of projects and environmental settings. It is not compatible with other product lines, and it is recommended to use only with AU Series paints for optimal results. Packaged in a convenient half-pint metal can, AU4001 offers the perfect quantity for small to mid-sized jobs, touch-ups, or multi-stage applications. When combined with the appropriate Restoration Shop components, it delivers a professional-grade urethane system trusted by painters nationwide. Key Features: Designed for Restoration Shop AU Series Acrylic Urethane Paint, Medium temperature hardener (70–85°F), Improves durability, gloss, and chemical resistance, Ideal 4:1 mix ratio (paint:hardener), 8 oz. (half pint) can – perfect for smaller jobs Note: Always follow proper safety and mixing instructions. For professional use only.