Collection: Filling & Stripping Knives

A putty knife is a flat-bladed hand tool used for applying and smoothing putty, filler and similar compounds. It can also be useful for light scraping, lifting loose paint and removing wallpaper residue. Flexible blades are suited to spreading filler, while firmer blades provide more control when scraping or working material into smaller areas.

Putty Knife, Filling Knife or Filler Knife: What's the Difference?

The names often overlap, so the job you are doing matters more than the label.

A filling knife or filler knife is usually chosen for applying filler to cracks, holes and surface imperfections before decorating. Putty knives can handle many of the same jobs, although stiffer versions are also useful for glazing putty and controlled scraping.

For everyday decorating work:

• Narrow blades suit screw holes, small cracks, edges and detailed repairs.
• Wider flexible blades make it easier to spread filler across larger patches and feather the edges.
• Stiffer steel blades give you more pressure when scraping away loose paint or stubborn residue.

A useful rule is to choose a blade slightly wider than the area being repaired. This allows you to spread filler beyond the edges rather than leaving a raised patch that needs heavy sanding.

Should You Choose a Flexible or Stiff Filling Knife?

A flexible filling knife follows the surface more easily, making it a good choice when applying thin layers of filler across walls, woodwork or plaster. Flex in the blade also helps with precision when you need to smooth the edges of a repair.

A stiffer knife is better when the job calls for more pressure. Think scraping loose coatings, removing dried material or working putty firmly into position.

Stainless steel is a popular choice because it is hard-wearing, rust resistant and easy to clean after use. Comfort matters too, particularly on bigger jobs, so look for a handle that gives you a secure grip without making the knife difficult to control.

What Else Do You Need When Filling Walls?

A good knife is only part of the preparation. Pair it with the right ready mixed filler for the repair, then smooth the dried area with hand and pole sanders before applying paint.

If the job involves cutting wallpaper or tougher scraping rather than filling, browse our knives and blades for more specialist tools.

When disturbing old painted surfaces, especially in older properties, take suitable safety precautions. The HSE guidance on lead and paint explains the risks associated with older lead-containing coatings.

Find the Right Filling Knife for Your Next Job

Compare the range above by blade size, flexibility, handle style and brand to find a tool that suits the surface in front of you. Haverhill Paint Supplies stocks decorating tools for both trade and DIY work, with free UK mainland delivery on orders over £49.99 and same-day dispatch on weekday orders placed before 1pm.

Choose the filling knife that fits the repair, add what you need to your basket and get the surface ready for its next coat.