It's a well-known fact, dark colours attract heat when exposed to direct solar radiation because they absorb the impacting sunlight and turn it into heat, while light surfaces reflect the majority of the impacting energy – a key consideration when choosing an exterior paint colour.

An external wall insulation system keeps building interiors comfortably cool in the summer.  But the surface – especially when there is a combination of dark colour shades and solar radiation – can reach temperatures of more than 80°C, which may lead to crack formation, insulant deformation and building element expansion. With StoColor X-black's innovative NIR (near-infrared reflection) black pigments, the StoColor X-black heat-relective facade paint is guaranteed to keep temperature peaks caused by solar radiation at below 70°C.