The Couteau d’angle intérieur is a specialised inside-corner knife designed for finishing and smoothing plasterboard internal corners. Its V-shaped blade allows perfect distribution of joint compound into the corner, creating clean, sharp and professional interior angles with minimal effort.
• Standard inside-corner knife
• Fixed V-shaped blade (90°)
• Suitable for all plasterboard internal corners
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| Property | Specification |
|---|---|
| Tool Type | Inside corner finishing knife |
| Blade Angle | 90° fixed V-shape |
| Blade Material | Stainless steel or flexible steel (model dependent) |
| Handle Type | Ergonomic non-slip handle |
| Primary Use | Finishing tapered joint compound in interior corners |
An interior corner knife is designed to smooth and finish joint compound inside 90° corners on plasterboard walls and ceilings. Its V-shaped blade produces sharp, clean, and consistent inside angles.
The fixed 90° angle matches the internal corner of two plasterboard surfaces. This shape ensures compound spreads evenly on both sides, eliminating ridges and creating a professional, uniform finish.
Yes. The design naturally guides the compound into the corner, making it easier for beginners to achieve clean results. With minimal practice, anyone can produce sharp, perfectly aligned interior corners.
Most models use stainless steel for durability and corrosion resistance. Some variations include slightly flexible steel for improved glide and pressure control along the corner.
Yes. A regular taping knife is typically used for embedding tape and applying the initial coat. The interior corner knife is mainly for smoothing, finishing and perfecting the final shape.
Absolutely. It is ideal for ceiling-to-wall internal corners. The ergonomic handle provides good control, allowing smooth strokes even when working overhead.
Use steady pressure and long, continuous strokes. Applying too much pressure can create ridges, while inconsistent force can leave uneven compound. Clean the blade regularly between passes for best results.
Yes. Most inside corners require at least two coats. The first coat fixes the tape; the second smooths the finish. Light touch-ups may be needed after sanding.
Yes, it works with ready-mixed compound, quick-set compounds and finishing plaster. The tool is versatile and compatible with all common drywall finishing products.
Clean immediately after use to prevent dried compound buildup. Store the tool in a dry place and avoid bending the angled blade to maintain precision in future applications.
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