The TapeTech MudRunner® delivers putty in the corners with precise control and minimal effort. A simple twist of the wrist activates the piston and creates a steady flow of putty. Turn it back and the flow will stop immediately. Use the Mudrunner with the TapeTech Corner Finisher to quickly obtain high quality finished interior corners or to apply the putty to interior and exterior corners when installing paper-wrapped corner guards on the drywall. The MudRunner® holds 50% more putty than a standard 200mm corner applicator and 70% more than a 175mm corner applicator.