The Best Wall Filler 2021

Repairing cracks or gaps upon walls or ceilings is far easier than you would expect when using a quality wall filler. Whether you use a ready mix or powder formula, both will permanently fill the defect in a single application and leave behind a smooth finish.

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Best Wall Filler
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If you require a quick answer, the best wall filler is the Everbuild One Strike, which is a ready mix formula that can fill holes or cracks up to 75 mm in size. It also dries in just 40 minutes and is suitable for internal or external repairs. However, if you would prefer to mix the filler yourself, the Tetrion All Purpose is the best alternative.

To rate the wall fillers within this article, we based our recommendations upon testing, research and multiple factors. The factors we considered included their type, dry time, filling capabilities, finish, surface compatibility and ease of application.

Wall Filler Comparison

Wall FillerTypeDry Time
Everbuild One StrikeReady Mix40 Minutes
Polycell Multi PurposeReady Mix1 to 2 Hours
Ronseal Smooth FinishReady Mix2 Hours
Polycell Deep GapReady Mix1 to 2 Hours
No Nonsense InstantTube2 Hours
Tetrion All PurposePowder2 Hours

Decorating filler is available as a ready mix in a tub and tube or as a powder pre-mix, which mixes with water. In terms of popularity, ready mix is by far the most popular filler due to its ease of use but powder mixtures are often much cheaper.

Below is a list of the best wall fillers that permanently fill walls, ceilings and other surfaces.

The Best Wall Filler


1. Everbuild One Strike Wall Filler

Everbuild One Strike Wall Filler
One of the most popular decorating fillers within this article is the Everbuild One Strike and it’s designed to fill holes up to 75 mm in size. It’s a versatile formula that can be used for internal or external use and it’s able to dry to a smooth finish within just 40 minutes.

Another great bonus of this wall filler is its “on-sag” properties, which prevents it from sagging upon walls and ceilings.

Other features of the Everbuild One Strike include:

  • Available in 250, 450, 1000 or 2500 ml tubs
  • Fills gaps up to 75 mm in size
  • Suitable for internal or external repairs
  • Very easy to use upon plaster walls
  • No mixing or sanding required
  • Dries within 40 minutes
  • Solvent free and non staining

Overall, the Everbuild One Strike is the best wall filler on the market that’s easy to use and offers excellent value for the money. The lightweight formula and the “on-sag” properties make it far easier to spread on walls or ceilings, which makes it really standout from the alternatives.
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2. Polycell Multi Purpose Polyfilla

Polycell Multi Purpose Polyfilla
Polycell offer a selection of decorating fillers but the Multi Purpose filler is their original formula that’s ideal for all interior repairs. It’s ready mixed in the container and is suitable for filling holes up to 10 mm in size.

Other features of the Polycell Multi Purpose Polyfilla include:

  • Shrink and crack resistant
  • Fills up to 10 mm
  • Surface dry in 1 to 2 hours
  • Suitable for all interior repairs
  • Drillable once dried
  • Available as 330g or 1KG tubs

The Polycell Multi Purpose Polyfilla is the best wall filler for DIY beginners that need to repair various holes, cracks and other defects. It really does tick all the boxes and it’s suitable for all interior repairs. The only drawbacks are that it does come with a premium price tag and it needs to be layered to fill more than 10 mm.
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3. Ronseal Smooth Finish Filler

Ronseal Smooth Finish Filler
The Ronseal Smooth Finish is another popular filler that’s ideal for repairing plaster walls, stone, concrete or wood. According to the brand, it’s suitable for filling holes up to 20 mm and it leaves a durable repair that won’t crack or shrink.

In terms of using this multi-purpose wall filler, it’s advised that you clean the surface and fill the gap until it raises above the surface. Once it has dried, you can then sand down the dried filler for a smooth finish.

Other features of the Ronseal Smooth Finish include:

  • Pre-mixed within a 900g tub
  • Fills up to 20 mm
  • Dries within 2 hours
  • Suitable for interior use only
  • Fills plaster, stone, concrete and wood

Overall, the Ronseal Smooth Finish is an excellent all-round wall filler that does what it sets out to do on the tin. Considering it’s a 900g tub of filler, it also offers the best value, which is another great bonus.
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4. Polycell Deep Gap Filler For Walls

Polycell Deep Gap Filler For Walls
Another wall filler by Polycell is their Deep Gap formula, which as the formula name suggests is designed to fill much larger gaps. Unlike the Multi Purpose formula, this particular filler is suitable for filling gaps up to 20 mm.

According to the brand, once the filler has had time to dry, it can be easily sanded and accept nails or screws.

Other features of the Polycell Deep Gap Filler include:

  • 1 litre container
  • Ultra tough yet smooth finish
  • Sag resistant formulation
  • Fills in a single application
  • Pot lasts for up to 18 months

Although more expensive, the Polycell Deep Gap is an improved wall filler that makes filling larger gaps far easier. It’s just as easy to apply as their other formulas and provides a great dried state that’s easy to sand and paint over.
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5. No Nonsense Instant Filler For Plaster Walls

No Nonsense Instant Filler For Plaster Walls
The No Nonsense Instant Filler is a ready mixed filler that’s ideal for filling and repairing cracks. It dries quickly and leaves a smooth finish that can be painted over with an emulsion based paint within minutes. Unlike the alternatives, this formula is in a tube, which makes it far easier to use and also less messy.

Other features of the No Nonsense Instant Filler include:

  • Sandable once cured
  • Dries within 2 hours
  • Requires a caulking gun
  • Smooth finish
  • 310 ml tube

For filling joints or screws hole, the No Nonsense Instant Filler is a great choice that can be easily applied using a caulking gun. It isn’t the cheapest wall filler on the market but it’s fast drying and leaves a smooth finish, which can be sanded or painted over once dried.
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6. Tetrion All Purpose Decorating Filler

Tetrion All Purpose Decorating Filler
Tetrion is a highly reputable brand among professionals and DIY enthusiasts and their original all purpose filler is one of their most rated products. It does require mixing but once you’ve mixed it up, it can be used to permanently fill a wide variety of surfaces with a tough and smooth finish.

Other features of the Tetrion All Purpose Filler include:

  • Two sealed 750g bags
  • Easy to mix with water
  • Tough and water resistant finish
  • Suitable for interior and exterior use
  • Bonds and fills most household surfaces

If you are more than happy to mix the filler, the Tetrion All Purpose formula is one of the best wall fillers on the market. It comes in two sealed bags to reduce wastage and it produces a versatile filler that’s ideal for indoor or outdoor use.
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How We Tested & Rated The Fillers

After years of repairing cracks and gaps upon a range of surfaces, we have plenty of experience using a variety of wall fillers. Our most recent test included a quick drying filler upon a plastered wall as shown in the image below.

best filler for plaster walls

This particular formula was very easy to apply and was ready for sanding in just 15 minutes. If you want to see before and after photos whilst testing this filler, we posted them on our Instagram page below.

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As well as testing a range of fillers, we also based our recommendations within this article upon plenty of research and multiple factors. The factors that we considered included their type, dry time, filling capabilities, finish, surface compatibility, ease of application and value for money.

Conclusion

A quality wall filler is an essential product if you intend to repair gaps, cracks or other defects. Within this article, we have listed a selection of fillers that can be used for internal or external repairs. To avoid disappointment, we recommend checking whether or not the filler can be used upon the surfaces that you intend to repair.

The Author Who Worked On This Article

author dan darimo

Dan Morgan

As a keen DIY’er, gardener and somebody that loves the latest tech, Dan is someone that brings years of experience in multiple trades. Since buying his first house, he has been obsessed with renovating properties and filling it with the latest products. This has led him down the road of testing hundreds of products and creating in-depth “how-to” and informative guides that offer his first-hand experience. Other interests include working on cars, keeping fit through sports or his home gym, caravanning and drinking great coffee.

If you would like to read more about Darimo and the authors, you can visit our about page. This goes into great detail regarding how we test products, create our guides and everything else.

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