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Drywall knife

A drywall taping knife.

Photo: Wikideas1 / CC0

Drywall knives, also called taping knives, are the wide steel blades used to apply and smooth joint compound. A narrow one presses tape and fills, and a wide one feathers the edges so the patch blends into the wall. The videos here use them for hammer-sized holes, mesh tape patches, corners and testing a Level 5 finish.

Apply thin coats, let each dry, and sand lightly between them. Keep the blade clean and the edges straight, because a nick in the blade leaves a ridge in the mud. Several thin coats beat one thick coat every time. Our drywall repair guide helps you choose the patch, and patch a hole in drywall shows the steps. See also drywall.

Videos

  1. Tear-Away Bead for Drywall Around a Fiberglass Shower Insert

    Step by step how toVancouver Carpenter · 20:45

  2. How the California Drywall Patch Works and Why It Fails

    Step by step how toVancouver Carpenter · 17:35

  5. Mud Framing: Hiding a Half-Inch Hump in Taped Drywall

    Step by step how toVancouver Carpenter · 28:15

  6. How to Coat Corner Bead With a Trowel: First-Coat Basics

    Tool how toVancouver Carpenter · 16:57

  10. Kitchen Subway Tile Backsplash: Demo, Green Board Patch, Grout

    Step by step how toFix This Build That · 15:21

  11. Cement Board and Aqua Defense Waterproofing for a Shower Wall

    Step by step how toThe Excellent Laborer · 15:55

  13. Easy Drywall Patch for Beginners: Plywood Backing and Mesh Tape

    Step by step how toVancouver Carpenter · 24:48

  14. Drywall Repair Methods for Dents, Nail Pops, Holes and Corners

    Step by step how toLowe's Home Improvement · 3:10

  16. How to Patch Small, Medium and Large Drywall Holes With Hot Mud

    Step by step how toHome RenoVision DIY · 30:48

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