Liquid Hardener mixes with Bondo Extreme Filler or Bondo Liquid Resin for Fiberglass to create high-quality, long-lasting repairs. When hardener is mixed with Bondo Extreme or Bondo Liquid Resin for Fiberglass, a chemical reaction occurs to create a mixture that will deliver a strong, lasting repair. Our hardener is easy-to-mix and must be used with Bondo Extreme Filler - not designed to use alone.
Liquid hardener designed to mix with Bondo polyester fiberglass resin and Bondo Metal Reinforced Filler requiring liquid hardener
Creates chemical reaction with resin for fast curing
Use with Bondo Fiberglass Resin for auto and home repairs including tubs, showers, sinks, pools, hot tubs, boats, and more
Results in a 100% waterproof repair
Apply to fiberglass, metal, brick, wood, and concrete surfaces
Once mixed, the fiberglass resin will cure in approximately 2 hours
Great for interior and exterior projects
Use during the Fill stage of the 3M Body Repair System
Compatible with Bondo Liquid Resin for Fiberglass – Bondo Liquid Hardener is designed to work with Bondo Liquid Resin (available in 2 sizes: Lowe’s Item #5693968 and #5693969)