The Couteau Demi Lune is a half-moon shaped finishing knife designed for smoothing, shaping and finishing plaster, skim coat and jointing compound. Its curved blade provides excellent control in tight areas, rounded surfaces and detailed finishing applications.
• Half-moon curved blade (standard size)
• Suitable for fine finishing and detailed plastering work
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| Property | Specification |
|---|---|
| Tool Type | Half-moon plaster finishing knife |
| Blade Shape | Curved half-moon design |
| Blade Material | Stainless steel or flexible steel (model dependent) |
| Handle Type | Ergonomic non-slip handle |
| Primary Use | Detail finishing, smoothing curves and patch repairs |
It is used for smoothing and finishing small or curved areas of plaster, skim coat and jointing compound. The half-moon blade design makes it ideal for detailed finishing, rounding edges and working in tight spaces.
The curved shape allows better contact on rounded surfaces and improves control when blending patches or smoothing tight areas. It helps eliminate flat spots and uneven edges that occur with traditional straight blades.
Yes. Because of its natural curved glide, beginners can easily achieve smooth, blended finishes in areas that are difficult to reach with standard knives. With light pressure, it creates clean results.
It can be used with plaster, skim coat, ready-mixed joint compound and patching materials. The blade adapts well to both thin finishing coats and minor repair compounds.
No. A standard knife is still needed for larger surfaces. The demi-lune knife is specifically designed for detail work, curves, edges and finishing touches that require more precision.
Absolutely. The half-moon blade works exceptionally well on rounded surfaces, domes, arches and decorative curves. It helps maintain smooth transitions without flat spots.
Keep the blade clean, apply light pressure, and use smooth, overlapping strokes. Working with a slightly wet blade also helps achieve a polished and streak-free finish.
Many models include a flexible stainless-steel blade, which improves control and allows the tool to follow uneven or curved surfaces without leaving ridges.
Clean immediately after use, dry thoroughly and store it flat or hanging. Avoid bending or applying heavy pressure to the curved blade to preserve its shape and performance.
It is commonly used in plasterboard finishing, patch repairs, curved wall sections, pipe surroundings, decorative elements, and areas requiring precision smoothing where flat knives cannot reach effectively.
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