The Mini Fill from National Abrasives Forget Mixing and Just Fill

I do enough decorating jobs to know that filling and making good is the most important part of getting a good final result. Clients will often be surprised at how long careful preparation can take, especially if they think that it is simply a case of rolling on some emulsion once the wallpaper has been stripped….. 

Good preparation usually involves a lot of filling and sanding which is tedious and dusty work. Any way of making these jobs easier warrants a closer look in my view.

I also know that there is a huge range of plaster-based fillers out there, and I have used many of them. Choosing the right one for the job can be important for speed, efficiency, and getting the right sanded finish. So, when I saw the Mini Fill I was keen to find out if this all-in-one hole and crack filler would be effective and, more to the point, save me time and hassle.

Think of Sausages

The Mini Fill looks like a small wrapped salami sausage. Roughly 23cm long and 3cm in diameter, it has a sealing cap on one end with a built-in stopper and filler/spreader tool.  For the necessary long shelf-life the Mini Fill has a seal on the business end of the sausage that needs to be broken before use. This is done by simply pulling off the plastic strip and screwing in the cap to pierce the ‘sausage’.  Then just pull off the sealing cap and a gentle squeeze on the tube will get the filler flowing.

Texture and Look

Because it is gypsum based, the filler inside the Mini Fill is a greyish white when it is unset, drying to a plaster white when set. The texture is pretty well spot-on for most filling jobs – wet enough to spread easily, but with enough body not to slump when it is used to fill slightly bigger holes – say those about 15 to 20 mm wide.

It also feels as though it has had a plasticiser added because it feels a bit sticky and is easy to finish smoothly. It certainly feels a bit more like applying a well-mixed skim plaster rather than a hand mixed proprietary filler. The standard gypsum based fillers for the usual DIY or professional use can feel a bit lumpy and dry in comparison, depending on the expertise of the mixer. Either way, I found that the texture of the Mini Fill was a definite plus point and added to its ability to get a smooth finish with minimal sanding. 

The end of the sausage includes a white plastic spreader onto which the filler is ejected when the tube is squeezed. When filling small cracks and holes left by plastic plugs this spreader is perfectly adequate and indeed leaves a smooth surface that is easy to sand flush when the filler has set. I tried to stretch the parameters a bit by using the Mini Fill to fill in 6 to 10mm wide cracks left when replacing a window frame. Although application straight from the tube using the spreader was easy enough, I think the idea of a corner applicator that National are introducing in the coming months will make this job a breeze.


Usable working time was very respectable too, because it is often easier to fill bigger holes and cracks by applying the filler, and then waiting ten minutes for the filler to set a little before spreading it further and then applying the final filler coat.

Setting time can vary according to warmth and humidity, but I found that by the time I got around the room I was preparing, and back to the start point (a couple of hours) the filler was ready to sand. Sanding is easy enough, and you shouldn’t have to use anything rougher than 120 grit abrasive paper to get a smooth finish.

Cleaning up the Mini Fill is simply a matter of re-inserting the stopper to seal the tube and washing the spreader under the cold tap. I kept a half-used tube for a week to test the seal before I finished it off and the contents were still usable, so the seal is good.

Looking at the Economics

With 80ml of filler per tube, the Mini Fill, as the name indicates, is best used where the filling needs are not too drastic. The cost of the Mini Fill retailing at up to £2.98 inc Vat would be easily balanced by the ease of use, and hassle free application and preparation of the finished surface. It would also solve the problem of half a box of filler powder, slowly getting hard in the cupboard under the stairs waiting for the next decorating job to come up. The same can be said of ready mixed fillers in tubes and tubs, which generally go hard. The Mini Fill has a 5-year plus shelf life.

Like other fillers, Mini Fill can be painted, sealed, sanded, drilled and plugged, so it is a genuine replacement for the usual market offers – but I still point out that its biggest selling points are its ease of use and the good clean finish with minimal effort, the brilliant built in scraper and long shelf life.

For Retailers

The Mini Fill comes in a handy counter display box for easy display and explanation. I think customers will like that fact that they only need to buy the Mini Fill to do the job – no need for unexpected extra bits and pieces like scrapers - and then the tubes are easy to dispose of too when they are used up. It all translates into time and convenience that are on the side of Mini Fill. 

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