Bondo® all-purpose white cream hardener mixes with two-part fillers, putties and glazes to create high-quality, long-lasting repairs. When filler and hardener are mixed, a chemical reaction occurs to create a mixture that will deliver a strong, lasting repair. Our hardener is smooth and easy-to-mix with fillers, putties and glazes.

• Formulated and packaged under controlled conditions to ensure consistent performance
• Easy mixing produces a quicker hardener and filler blend
• For use with all fillers, putties and glazes
• Formulated exclusively for use with 3M Bondo® fillers
• Use during the fill stage of the 3M body repair system
• Ideal for repairing vertical surfaces such as doors, walls and siding
• Designed for interior and exterior projects
• Easy-to-mix consistency ensures ideal results
• Non-shrinking and water-resistant
• When filler and hardener are mixed, it will feature a light gray color once cured