Not suitable for any purpose: on which substrate does silicate paint last?

Silicate paints have a very specific chemical consistency and therefore do not dry in the usual way, such as emulsion paints. And that's why they do not stick on any surface, but they need a suitable reaction partner in order to form a solid layer together with him. What does this reaction partner look like?

Basic knowledge: This consists of silicate paint

Silicate paint consists of purely mineral components, the binder is potassium silicate glass. That is why silicate paints are sometimes called water glass paints; the name seed color is also common.

Naturally, a silicate paint does not cure by physical drying but by carbonation with the substrate. The substrate must be made of a mineral material and must not bear a non-mineral coating.

The big advantage: silicate paint does not form a layer that sticks to the substrate, but chemically combines with the surface. This results in a surprisingly long durability and durability.

On what surface does silicate paint carbonate - and on which not?

Which substrates are exactly what are suitable for painting with silicate paint? We take a close look at different materials:

undergroundsuitable for silicate paints
calcareous sandstoneYes
fiber cementYes
Cement and lime plasterYes
lime cement plasterYes
calcareous sandstoneYes
KalkfarbenanstrichYes
Silicate paint colorsYes
concreteYes
plasterNo
dispersion paintNo
Primer with undergroundNo
Primer with potash waterglassNo
GlassNo
paintworkNo
metalNo
WoodNo

One thing stands out in this table: gypsum is definitely a mineral material and yet a gypsum substrate is not compatible with silicate paint. This is due to the fact that the chemical reaction damages this substrate and therefore usually leads to exfoliation or cracks.

Attention: Silicate paints are alkaline!

Silicate paints have another important property that you should know before using this paint: they have a high pH and therefore have a corrosive effect.

Protect your skin and eyes before opening the paint bucket. Above all, cover tiles and glass in the area, as these materials could be damaged by splashes of paint.

Tips & Tricks

Although the color is not harmless when wet, it is still considered an excellent indoor coating. After drying, you can no longer get used to it, quite the contrary: the coating leaves your wall to breathe and simultaneously fights mold and germs.

Video Board: What is SILICATE MINERAL PAINT? What does SILICATE MINERAL PAINT mean?