Use it with TapeTech corner finishers to quickly achieve high quality, finished internal corners or with mud heads to apply compound to internal and external corners when installing paper faced. The MudRunner® holds 50% more joint compound than a standard 8" Corner Applicator and 70% more than a 7" Corner Applicator. The MudRunner® applies compound to external corners for paper faced bead application, inside corner for tape application and finishes internal corners. Ships from and sold by All-Wall Equipment. Use it with TapeTech Corner Finishers to quickly achieve high quality, finished internal corners or with Mud Heads to apply compound to internal and external corners when installing paper-faced corner bead to drywall. This item: TapeTech MudRunner Tool Case - Padded, Zippered with Carry Handle. Twist it back and the flow stops immediately. A simple twist of the wrist activates the piston and creates a consistent flow of joint compound. A simple twist of the wrist starts a continuous flow of joint compound and turns off just as easily. The MudRunner takes the concept of a Corner Applicator to a whole new level and makes finishing corners effortless. Use with TapeTech Corner Finishers and Mud. A simple twist of the wrist activates the piston and twist it back to stop the flow immediately. Delivers compound to corners with precise control and minimal effort. The TapeTech MudRunner® delivers joint compound to corners with precision control and minimal effort. TapeTech Mud Runner Description The TapeTech MudRunner® delivers joint compound to corners with precision control and minimal effort. The MudRunner is another exclusive innovation from TapeTech. Holds 50 more joint compound than an 8 Corner Box and 70 more than a 7 Corner Box. South Georgia & South Sandwich Islands (CAD $).