For Silicate Masonry Paint to work effectively, you’ll need to use either Silicate Primer or Bonding Primer before application.
Silicate Primer: https://greenshoppaints.co.uk/products/earthborn-silicate-primer
For bare, porous, unpainted masonry substrates such as lime plaster, stone, pebbledash & concrete. When used with Silicate Masonry Paint it will create a highly breathable and permanent chemical bond. The Silicate System requires all surfaces to be primed with a single coat of Silicate Primer followed by two coats of Silicate Masonry Paint (first coat must be diluted with 10-20% Ecopro Silicate Primer).
Bonding Primer:
https://greenshoppaints.co.uk/products/earthborn-bonding-primer
For use over previously painted, sound masonry substrates. When used with Silicate Masonry Paint it will create a strong mechanical bond.
Earthborn paint and primer products when used together form a bond to the underlying substrate to create a weather resistant, beautiful matt finish.
Earthborn primers are water based and virtually VOC free.