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Trowel Corner
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Trowel Corner
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Trowel Corner
Trowel Corner
Construction & Hardware Product

Trowel Corner

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Corner trowels are specialized masonry and drywall tools designed to create clean, sharp, or rounded 90-degree angles in plaster, stucco, and concrete. They are categorized primarily into Internal (Inside) and External (Outside) types.

Essential Corner Trowel Types
  • Internal Corner Trowel: Used for smoothing materials into a 90-degree inside corner where two walls meet. These typically have a blade angle slightly less than 90° (e.g., 89°) to ensure a tight fit when pressed.
  • External Corner Trowel: Features an outward-angled blade to finish protruding corners, such as door frames or external wall edges. These often have a blade angle set to 103° to allow for flex during application.
  • Bullnose Corner Trowel: A variation with a curved radius, used specifically for creating rounded corners rather than sharp 90-degree edges.
  • Adjustable Corner Trowel: Features a hinge mechanism that can be modified to fit various corner angles (typically 70°–110°), ideal for non-standard joints like archways or custom architectural features
  • Key Features to Consider
    • Material: Stainless steel is preferred for its rust resistance and easy cleanup. Flexible plastic versions are cost-effective for light-duty or one-time DIY projects.
    • Flexibility: A good corner trowel should have a slight flex to adapt to wall pressure, helping eliminate air gaps and ensuring a smooth finish.
    • Handle Design: Ergonomic soft-grip handles reduce hand fatigue during long projects.
    • Corner Radius: Some rounding trowels feature blade radii between 25mm and 75mm for creating soft, aesthetically pleasing curved edges. [1, 4, 5, 6, 7, 8]
    Pro Tip: For the best results, use an internal trowel that is slightly less than 90 degrees and an external trowel that is slightly more; this "pre-bent" design ensures the edges of the tool don't dig into the wall when you apply pressure.
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