A putty knife is a hand tool used to apply, spread, smooth, and scrape putty, filler, spackle, or joint compound during surface preparation and repair work.
A putty knife consists of a flat steel or stainless steel blade attached to a comfortable handle. It is primarily used to fill cracks, holes, joints, and other surface imperfections before painting. The flexible or rigid blade allows for smooth application of fillers and easy removal of excess material, helping create a level surface for priming and painting.Common Types
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Flexible Putty Knife – Best for spreading putty, filler, and joint compound smoothly.
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Stiff Putty Knife – Used for scraping old paint, adhesive, and hardened filler.
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Wide Blade Putty Knife – Ideal for patching and smoothing large wall surfaces.
Common Sizes
Blade WidthTypical Use1–2 in (25–50 mm)Filling small cracks and nail holes3–4 in (75–100 mm)General wall repairs and putty application5–6 in (125–150 mm)Large patching and surface leveling
Common Blade Materials
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Carbon Steel – Strong and durable for general-purpose use.
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Stainless Steel – Rust-resistant and easy to clean.
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Plastic – Suitable for light-duty repairs and delicate surfaces.
