These Body Filler Hardeners are mixed with a Body Filler to create a chemical reaction forming an extremely strong, waterproof repair material.

The secret to a better finish with the 3M™ Dynamic Mixing System lies in the vortex-like action in the mixing nozzle. By mixing 2-component products directly in the nozzle, the applicator quickly delivers the perfect ratio of product. Within this sealed environment, no air is allowed to enter when the filler or glaze and hardener are mixed.