The composition of natural minerals and different deposits makes stone
organic and therefore there are nutrients available for the moss' spore.
The spores are spread by the wind and occur only outdoors. The affections of moss have begun.
Moss establishes extensive holds on stone and to get rid of recurring affections and growth, all old moss and spores must be removed from the stone's surface and its pores by cleaning.
The moss must be sterilized. The surface must be disinfected. Bensaltenside protects stone for a minimum of four years, but often for longer than that.