Silicate paints form a very special category in the large range of modern paints. Because they solidify in a special way, they only last on mineral substrates - surfaces made of wood, plastic or paper are therefore completely unsuitable. But there is a loophole that deserves a closer look!
Why does silicate paint not normally support wood?
Silicate paint needs a mineral reactant to form solid calcium silicate hydrates. The painter professional calls this process "silicification", while the paint enters into a firm connection to the substrate. Trock This method of drying contributes to the long life of a silicate coating, because the substance becomes one with the underlying plaster, so to speak, it forms no separate layer. The natural silicate paint adheres to these substrates - and not to these:
Underground
| Suitable for silicate paint? | plaster of lime and / or cement |
|---|---|
| yes, very good | concrete |
| only without formwork oil | plaster |
| no, due to damaging interactions | sand-lime brick |
| yes, very good | fiber cement |
| yes, very good | lime paint |
| yes, very good | Emulsion paint |
| no, not mineral | wallpaper |
| no, not mineral | surface coated with background |
| no, too much plastic in the substrate | Silicate paint for wood is still available! |
Those who do not want to insist on regular silicate paint will still find it thanks to new developments in the paint sector. The company KEIM, as a specialist for this special type of paint, recently launched a product called LIGNOSIL®, which is in demand especially in the field of listed buildings.
Among the dispersion silicate paints, there could also be products that are quite durable on wood. Acrylic and other organic substances are added to this type of color. This results in a mixed form of emulsion paint and silicate paint.
Dispersion silicate paints with an increased plastic content no longer silicify, but they dry by evaporation of the solvent. Therefore, they can also be used on non-mineral substrates, but they have a film-forming effect and inhibit diffusion.
Tips & TricksWood surfaces can be colored in many ways, for example, with stains, oils, waxes and varnishes. Maybe this selection does not necessarily have to be a silicate paint!