Best Filling Knife UK

Thanks for taking your time to read our information on the best filling knife. A filling knife should only be used for filling in holes in walls, ceilings or wood work. They are designed to have flexibility in the blade, which allows you to push filler into any gaps, cracks or holes.

These often get confused with wall scrapers and mixing those up can lead to problems.

What is a Filling Knife Used For?

A filling knife is very good at removing marks, slight imperfections and for filling holes. Having a couple of different sizes can be handy as it allows you to work on different sized areas.

For these you want a comfortable non-slip handle and a good quality flexible blade. In our opinion the more flexible the better, especially if you have walls with contours.

 If you have done any DIY, then you will understand that very few walls are dead square. With a flexible filling knife you can fill the existing contour rather than put loads of filler on.

Like any good tool, we recommend avoiding the cheaper ones which will be made of stainless steel. They are not that flexible and have quite thick blades.

The better quality ones will be made from hollow ground steel and have lots of flexibility, which is exactly what you need.

In a Hurry?

We provide a lot of information on this page, so if you want a quick answer, then the best filler knife is the Harris Seriously Good Continental Filling Knives 4 Pack


These are very high quality and the set has all the sizes in it that you will ever need.


They are simple but very effective.

"With over 300 online buyer reviews and a 92% buyer satisfaction rating, this is the most popular choice by UK buyers, based on our extensive research. 

Best Rated Filling Knife

We have completed researching the top 10 filling knives so as our readers don't have to. Below we have included the top 10 most popular of these knives that are currently sold online in the United Kingdom

Harris 102064328 Painting Tools Seriously Good Continental Filling Knives 4 Pack

92% buyer satisfaction based on 300+ online buyer reviews.

  • This is a very comprehensive set of 4 blades that are used for professional filling at a very good price
  • They have flexible stainless steel blades ideal for filling small holes cracks and detailed areas
  • This contains a variety of sizes suitable for repairing small areas of damage - 2", 3", 4" and a 5"
  • They should be used with general purpose filler fine surface filler and wood filler
  • These are also very easy to use though we would recommend gloves to avoid getting cut on the sharp blade edges

These are also very easy to clean so can be used over and over again.


Stanley Dynagrip Filling Knife

94% buyer satisfaction based on 200+ online buyer reviews.

  • This is a classic filling knife from the Stanley brand
  • It is a 2" or 50 mm knife
  • The handle is contoured and this gives it a nice firm grip
  • The blade is made from ground stainless steel meaning it is perfectly flexible which is exactly what you want
  • Buyers say this knife is very easy to clean and doesn't rust

This is your sterotypical filling knife and it's exactly what the majority of people will use. Cheap, functional, tried and tested over many years.

Faithfull professional Filling Knife 25MM

94% buyer satisfaction based on 400+ online buyer reviews.

  • This is a particularly nice filling knife to have
  • It has a top quality stainless steel blade which is strong an flexible
  • The blade is brass riveted to the handle and the whole tool feels very secure
  • The  handle made from rosewood which is lovely. Wooden handled tools as very comfortable to use
  • The blade is through tanged for heavy-duty application
  • I loved using this knife, it just feels great in your hand

This is a really nice knife that is a joy to use and just feels that bit different. The wooden handle is so easy on the hand. This might not appeal everybody, but it is my favourite.

Hamilton 0624-12 Perfection Flexible Filling Knife 50mm 2"

94% buyer satisfaction based on 50+ online buyer reviews.

  • This is a standard type of filling knife from Hamilton
  • It is a 2" or 50 mm knife
  • The wooden handle is sucure and comfortable to use
  • The steel blade is quite flexible and works very well for large and small cracks
  • These are a bit more expensive but are considered to be one of the best
  • Buyers who bought this tool wouldn't go back to a cheaper type

This knife is a quailty product and is favoured by the professionals and users who consider themselves craftsmen. Hamilton are a well established manufacturer in this area and are well know for producing quality tools.

Axus Décor AXU/FKS4 Filling Knife

92% buyer satisfaction based on 600+ online buyer reviews.

  • This is a very comprehensive set of 4 blades that are used for professional filling at a very good price
  • This set contains a variety of sizes suitable for repairing various areas of damage - 25,50,75 and 100mm
  • The blades are made from rust-resistant stainless steel, and are specially processed to achieve ultimate flexibility
  • The tops are aluminium and are easy to hold
  • These style of blades are very easy to clean

This is a really good set at a really nice price. These Axus filling knives are both rust resistant and highly flexible. It's very hard to get both these features together.

Stanley 028820 50mm Professional Filling Knife

92% buyer satisfaction based on 200+ online buyer reviews.

  • This is classed as a professional filling knife as it has a one piece steel blade and the tang is embedded into a traditional rosewood handle
  • The blade is a 2" or 50 mm alloy steel blade
  • The blade also has a graduated thickness which helps with the filling process
  • Buyers liked the flexible clean edge and said it made a huge difference to any filling knife they had used before.

Many buyers of this had made the mistake of using a wallpaper scraper to fill cracks and holes, before they used this filling knife. They were amazed at the difference.

5Pcs Filling Knife Set

90% buyer satisfaction based on 100+ online buyer reviews.

  • This is an affordable option and good value for 5 knives
  • You get five knives in this set a 1" a 1.5" and a 2" which is a good range
  • The blades are made from corrosion resistant spring-tempered carbon steel
  • The handle has a soft grip which many buyers seemed to appreciate
  • Again I prefer this wooden handled type

This is a really good value set that gets great reviews. There's not much sense in buying a set of 5 if you aren't going to do a lot of filling, so I am not sure who would buy these.

Filling Knife Buying Tips

These buying tips should help narrow down your choices, and we think they are worth a quick read.

Tip 1 - Flexible Blade

As you can see the secret to any good filling knife is in the flexibility of the blade. Our advice is always to buy a carbon stainless steel for the best flexibility and you will never go to far wrong.

Tip 2 - Non-Slip Handle

You can buy blades or a knife with handles, and mainly that is down to what style you prefer working with. Although the blades are handy and cheaper, there is always the risk of cuts if your fingers slip or slide.

With a good handle and a nice grip, you eliminate that risk. Many users also state that the handle gives you a lot more control.

Tip 3 - Buy a Set

It really comes down to how much filling you need to do. For simple fills then a single knife will be your best option, ideally something with a 2" (50mm) blade.

If you have to fill in wider cracks or multiple sizes of holes, then consider buying a set with different size blades, as this will help speed up the process.

Still Undecided?

If you are still not sure, then remember our recommendation for the Harris Seriously Good Continental Filling Knives 4 Pack

These are very high quality and the set has all the sizes in it that you will ever need.

"With over 300 online buyer reviews and a 92% buyer satisfaction rating, this is the most popular choice by UK buyers, based on our extensive research.

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