Umbra colour patination is suitable for old and new in-situ and precast concrete surfaces. The patina’s reagents penetrate the surface of the concrete where they react with the cement to form reddish-brown coloured compounds. Three to four applications are required depending on the properties of the concrete and the desired hue. The finished colour is nuanced and surface knocks and scratches are easy to cover over.

It is preferable that the work be carried out on site. Continuous application over a large area covers over joints between elements and helps eliminate variation in tone between individual elements. It is essential that all cement glue is carefully removed from the surface first by e.g. Sandblasting.

Kangasala Cultural Centre. Architects: Heikkinen-Komonen Ltd

Kangasala Cultural Centre. Architects: Heikkinen-Komonen Ltd