Putty Knives + Knives
Putty knives help you apply and smooth filler or plaster, choosing the width according to the surface area. Utility knives with various blade widths enable precise cuts in materials such as wallpaper, foil, or cardboard.
Buying Spatulas + Knives — Guide & Tips
Whether wallpapering, plastering, or precisely cutting insulation materials – spatulas and knives are among the most used helpers on any construction site. In our category with 21 articles you will find exactly the tools that are crucial for clean results in painting, electrical, or flooring work. The right spatula is not just a matter of width, but also of blade shape and material composition. For fine repairs in corners and edges, reach for narrow spatulas with a blade width of 20 to 40 mm. For large-area spatula work on walls or ceilings, wide models from 100 mm are suitable, which distribute and smooth the compound evenly. Pay attention to a flexible, rust-free blade – it makes work easier and ensures a clean surface without scratches.
With knives, the focus is on the cutting task: Utility knives with 18 mm blades are the all-rounder for wallpaper, film, cardboard, and light insulation materials. For thicker materials such as carpet, linoleum, or plasterboard, models with a 25 mm blade and reinforced guide are recommended. The blade guidance is crucial: a stable metal body prevents twisting and ensures precise cuts. Safety aspects such as automatic blade retraction or break-resistant snap-off blades should also be considered when selecting. Those who cut frequently benefit from ergonomic handles with non-slip coating – this protects the hands even during longer work.
The combination of both tools is typical for renovation projects: With the utility knife you cut precisely, with the spatula you apply or lift off old coverings. For the right choice, a look at the planned work helps: Fine spatulas with rounded corners are suitable for joints and small holes, while wide, trapezoidal spatulas are optimized for smoothing plaster surfaces. With utility knives, a distinction is made between standard snap-off knives, safety knives with concealed blade, and special carpet knives with hook blades. Plan before purchasing which material thicknesses you will mainly work with – this determines the required blade width and stability.
Popular Spatulas + Knives
These three products represent the typical applications in the category: The 18 mm replacement blade set is the basis for any utility knife and should always be stocked – snap-off blades wear out and must be replaced regularly to guarantee clean cuts. The 40 mm painter's putty knife is the ideal companion for small repairs: It fits well in the hand and is suitable for filler, joint compound, or for applying paint dabs. The Safety carton opener PresstoCut in turn is a special tool for logistics and warehousing that minimizes cut injuries. Especially if you open packages regularly, such a model is a worthwhile investment.
Frequently Asked Questions
Which spatula width do I need for which job?
The choice of spatula width directly depends on the size of the surface. For narrow joints, corners, and small holes up to about 5 cm in diameter, a spatula with a blade width of 20–40 mm is sufficient. For smoothing larger putty areas on walls (e.g., after removing wallpaper or when repairing plaster), widths of 80–120 mm are recommended. Very wide spatulas from 150 mm are mainly used in drywall construction to embed joint tape or fill plasterboard panels. A set of two to three different widths covers most renovation work.
When should I use a utility knife with an 18 mm blade and when with a 25 mm blade?
The 18 mm knife is the standard for light to medium cutting work: wallpaper, foils, thin insulation materials, cardboard, and paper. The blade is narrower and breaks more easily – this is intentional to always have a sharp tip. A 25 mm knife with a more stable blade is suitable for thicker materials such as carpet, linoleum, plasterboard panels, or multi-layer insulation materials. The thicker blade twists less and enables straight cuts through harder materials. Check before purchase whether your knife can accept both 18 mm and 25 mm blades – some models can be converted for this.
How do I properly care for and sharpen spatulas and knives?
Spatulas made of stainless steel or hardened steel should be cleaned with warm water and a brush after each use – dried-on filler is difficult to remove later and can dull the blade. Utility knife blades are simply replaced: break off the blunt end at the predetermined breaking point – and you have a sharp tip again. For a complete sharpening of the knife blade, you can use a whetstone or a special knife sharpener like the WNS45use. Always ensure dry storage conditions to avoid rust.
What safety aspects are important for utility knives?
Look for automatic blade retraction or a locking mechanism that secures the blade in the handle. Many modern models have a blade slider that can be operated effortlessly and fully retracts the blade when not in use. For tasks with a high risk of injury (e.g., opening packages), safety knives with a concealed or replaceable blade are recommended. Further tips on proper handling can be found in our blog article “The Utility Knife: The Precise Helper for DIYers”As a rule: Always cut away from your body and use a suitable cutting mat.
Other categories
Matching spatulas and knives, you will find other hand tools in our range that are often needed together in renovation and construction projects. The parent category Hand toolsprovides an overall overview of all tool groups. If you also perform screwdriving tasks, the categories Wrenches + Screwdrivers and Workshop Supplies are the right place. For fixing workpieces during filling or cutting, we recommend a look at the category Pliers + Clamps.
Especially during demolition or renovation work, a Crowbarbe useful for loosening old tiles, wooden floors or panels. Plan your work steps in advance: With a spatula and knife, you prepare surfaces or cut materials – for subsequent fastening or assembly you will usually need screwdrivers or pliers. The right combination saves time and ensures a professional result.
In brief
The category Spatulas + Knives includes 21 tools for precise cutting and filling work in renovation, crafts and repairs. Narrow spatulas (20–40 mm) are suitable for joints and small areas, wider models (80–150 mm) for smoothing large surfaces. Utility knives with 18 mm blades cover light cutting tasks, while 25 mm knives are designed for thicker materials. The range is supplemented by safety tools such as the PresstoCut for opening cardboard. When choosing, pay attention to material quality, blade guidance and ergonomics – this increases both safety and work quality. Combine spatulas and knives with suitable hand tools from neighboring categories to be optimally equipped for every project.