Gewölbe
Coatings

Binders for coating systems

Since ancient times, buildings and sculptures have sported paint coats and coloured edging. They served (and still serve) as design elements and also as a protective and wear-resistant layer. The importance of the protective function, in particular against damaging moisture - has increased in recent times in light of emission-related weathering damage.

The International Charter for the Preservation and Restoration of Monuments and Ensembles’ (Charter of Venice’) from 1964 forms a binding base for handling historical building substances at the international level. It acts as the central implementation instructions for all work connected to monument preservation and also defines the requirements made of the building materials that are used. It recommends only using modern preparation and construction methods to secure a monument, if the traditional methods are insufficient and if the efficiency of the modern preservation and construction methods have been scientifically verified and tested in practice (Art. 10).

When applied to the building materials and preservation of structures field, this requirement explains why, when preserving monuments, historically proven binding agents are often preferred over new ‘modern’ binding agents. Also, the Charter of Venice defines requirements for

  • reversibility (each measure represents an intervention into the original substances and is therefore to be kept to a minimum and should be ‘repairable’ again as far as possible and/or have the possibility to repeat the preservation intervention again carefully’.)
  • and the authenticity (the ‘genuineness’ of the monument should be impaired as little as possible). Frequently, there is a conflict of interests between the preservation of monuments objectives and the technical optimum. In addition, craftsmanship issues related to certain materials and/or binding agents has the potential for conflict.

The ‘restoration and preservation of art and cultural assets’ department at the Polytechnic of Cologne developed a new preparatory method for lime at the end of the 90s.

Classic silicate or mineral paints are known for their high-quality design and indestructibility. The reason for this is the mineralogical binding agent, water glass, and the fact that it has been used for numerous applications on outstanding architectural monuments, in particular early modern structures.

Coatings

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Article No. 0624

Mineral primer with a waterproofing and strengthening effect

Article No. 0630

Mineral paint with fine-grained texture

Article No. 6410

Transparent, diluting additive for silicone resin paint systems used to adjust the degree of scumble