Silicate Primer 621


Fixative primer for silicate paints, for interior use, solvent free.

Application range: 

Primer for strongly absorbent and sanding surfaces, pre- treatment for LEINOS Silicate Wall Paint 690. Suitable as thinner for Leinos Silicate Paint 690 to be used as an undercoat.

Technical qualities: 

Transparent primer, deeply penetrating, extremely water vapour permeable, inhibits fungi and mould, induces an irresolvable silification of the surface.


Transparent, after drying nearly colourless.

Full declaration: 

Water, potassium silicate, organic binding material. Silicate Primer contains max 1 g/l VOC. EU limit value for this product (cat. a): 30 g/l (2010).


Stir well before use and during application. Apply by brush or roller at temperatures above 15°C. Always apply a test coat. Ensure good light and ventilation conditions during use and drying times.

Container sizes and coverage: 

Approx. 100 ml/m2 depending on the absorbency of the surface.

1l20 m2
2,5l50 m2
10l200 m2

* Coverage per coat when mix with water 1:1



Under cool and dry conditions, prevent from freezing. Shelf life of unopened containers 12 months.


(EWC) 08 01 03.

Hazard statements: 

Safety data sheet available on request.

Precautionary statements: 

Keep out of reach of children.
Avoid release to the environment.
Dispose of contents/container according to local regulations.
Caution the product is alkaline! Protect eyes and skin against splashes. Splashes on glass, natural stone, aluminium, wood and paint should be washed off immediately with plenty of water.