Old Masters 5oz Hardener for Apex Finishes

The Old Masters 10-0109-25 5oz Hardener is a powerful performance booster designed specifically for use with Old Masters Apex High Performance Polymer (HPP) Interior Water-Based Clear Finishes. This optional additive enhances the durability, chemical resistance, and overall toughness of the finish, making it ideal for high-traffic areas and surfaces exposed to frequent wear and tear. Whether you're finishing cabinetry, doors, trim, or furniture, adding the hardener allows the Apex system to deliver professional-level results with increased longevity.

By integrating this hardener, you improve the coating’s resistance to scratches, household chemicals, and moisture, while also maintaining the excellent sandability, self-sealing capability, and fast dry times that Apex HPP is known for. It helps accelerate stacking and handling timelines, making it an excellent solution for shops or users working under time constraints. The 5oz size is ideal for precise mixing and offers a convenient, manageable quantity for individual projects or touch-ups. This hardener is easy to use and mixes directly into the Apex finish per manufacturer recommendations. The result is a tougher, more resilient surface that stands up to daily use without sacrificing clarity or smoothness. For professionals and DIYers looking to elevate their finishing results, the Old Masters Hardener for Apex is a smart addition to your toolkit.

• Optional additive for Old Masters Apex HPP clear finishes
• Improves overall durability and long-term surface performance
• Enhances chemical and wear resistance for high-traffic areas
• Maintains fast dry times and excellent sandability
• Supports faster stacking and handling after application
• Ideal for use on furniture, trim, cabinets, doors, and more
• Mixes easily into Apex finish following manufacturer instructions
• Does not compromise the clarity or smoothness of the finish
• Convenient 5oz size is perfect for controlled mixing
• Recommended for users seeking increased protection and resilience