The most important properties of fillers

In order to find the right leveling compound for a particular application, it is necessary to know the properties of leveling compounds. What is to be understood by terms such as filling power, dry grindable and pot life is explained in detail in this article.

Note application areas

Leveling compounds may only be used in the fields of application approved by the manufacturer and on the materials specified by the manufacturer. All properties are only valid in this area.

On a different material or other than the approved conditions of use, the putty may have different properties throughout. You should always remember that.

Preparation of the filler

Fillers are available in powder form or as processible finished filler. In both cases a lot has to be considered.

setup time

The set-up time is the time needed to touch putty. The putty must be placed in the respective stirred tank, mixed with water and then swell.

How much time is required, indicates the so-called set-up time. Ready-to-process products have no set-up time, so they are time-saving.

pot life

The pot life refers to the processing time of the filler. The time span is defined between mixing the material (important!) And the end of the processability.

Always observe the conditions under which the specified pot life applies. The following factors are important:

  • the temperature (especially important, since the pot life can change very significantly with temperature changes)
  • humidity
  • mixed amount of putty

Processing the filler

During the putty work further properties of the filler are important.


The smoother a putty is, the easier it can be processed (by hand). The opposite would be viscous or pasty.

open time

This refers to the time until hardening of the putty. It is still malleable during this period. Electrician gypsum, for example, has an extremely short open time, but this is intentional in this case.

filling power

The filling power in putties is determined by the fillers contained. The higher the filling power, the lower the consumption. Even in thin layers bumps can then be well covered.

adhesive force

This is especially important in terms of cost-effectiveness. Leveling compounds, which have a high adhesive power even with thin application, are particularly economical.


Some putties can also be processed with the roll. However, this requires that they also have a high adhesive force and the highest possible filling power. Large areas can be easily filled with the roller.


The weight of the putty is important for adhesion, especially when thick layers are applied.


In addition to the time to harden the filler, other properties are important.

Crack-free drying in high layers

Especially when applying thick layers, cracks may occur during drying. Usually the manufacturer guarantees a crack-free drying up to a certain layer thickness.

Dry sandable

Not all putties can be easily sanded when cured. But this can be a problem for the subsequent wall design.

Good felt

Spachtelmassen that are good feltable, can be perfectly smooth. Grinding can then often be omitted.

Video Board: My experience with injectable Hyaluronic Acid, Profhilo