The air is cleaned by simply switching on the light. Sto’s active interior paint eliminates odours and breaks down harmful substances. What is really unique is that StoColor Climasan is the first and currently only interior paint to do so without the need for sunlight. Standard interior lighting is sufficient to initiate the cleaning process. The result is a noticeable improvement in the ambient air quality, including in heavily frequented areas such as kitchens, sales rooms and smoking areas.