A taping knife or joint knife is a drywall tool with a wide blade for spreading joint compound, also known as “mud”. Spackle knives are a smaller version, used for patching small holes. A right-angle joint knife allows one to apply joint compound to inside corners where walls meet.Click to see full answer. Also asked, what are the best taping knives? 3 Best Drywall Taping Knives of 2020 with Reviews Warner 12″ ProGrip Blue Steel Drywall Taping Knife. Red Devil 4218 6-Inch Flex Taping Knife. LEVEL5 8-Inch Blue Steel Soft Grip Taping Knife. how do you use a plastering tape knife? Starting in the middle of the newly taped joint, hold your taping knife at a 25 degree angle and pull the knife to one end of the joint, smoothing and pressing the tape firmly into the compound. Return to the centre point and repeat in the other direction. (This prevents the tape from pulling off the wall.) In respect to this, what size taping knives do I need? The Right Knife Most 4-inch, 6-inch and 8-inch taping knives are used for applying drywall mud to gaps or holes and for taping. They are also used to remove excess drywall mud. The 12-inch taping knife is used for feathering areas where a wall or ceiling may be sloped or uneven.What is taping knife used for?A taping knife or joint knife is a drywall tool with a wide blade for spreading joint compound, also known as “mud”. It can be used to spread mud over nail and screw indents in new drywall applications and is also used when using paper or fiberglass drywall tape to cover seams.

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