Photocat is a Danish green tech company founded in 2009. We are situated just outside the Copenhagen area in the Municipality of Roskilde. Here we produce our photocatalytic technology for building materials, which reduces air pollution. Our partners are manufacturers of bitumen membranes, concrete pavers and hardwood floors with operations in Europe and North America.

Photocatalytic building materials degrade air pollutants such as Nitrogen Oxides and Volatile Organic Compounds when exposed to light. These pollutants lead to lower quality of life, sickness and an increase in hospitalization. Together with our partners we are leading the way for a new breed of sustainable and smart buildings that clean the air we breathe.


The NOxOFF™ and actiFLOOR™ technology developed by Photocat is the leading photocatalytic technology for building materials such as concrete, bitumen membranes and hardwood floors. The technology behind NOxOFF™ is to date the most tested technology regarding real life tests. The NOxOFF technology is tested in a two-year demonstration case at Copenhagen airport, funded by the Danish Market Development Fund, where it was documented that the technology mitigated the NOx concentration with an average of 13 % during the tested period. Additionally, it was documented that during peak hours, both regarding natural sunlight and the highest concentration of NOx emissions, the effectiveness was up to a 24 % mitigation of NOx.

In 2017, Photocat finalised a three year study in its home municipality of Roskilde in Denmark. For this study we developed an optimized photocatalytic treatment to the asphalt surface in Roskilde. At the same time an in-situ set-up was developed enabling to test the activity of the photocatalytic treatment in the test period of three years. Based on the test result it was concluded that the photocatalytic NOxOFF™ treatment is stable over time by which it can be concluded that if an incoming solar radiation of 563 kWh/m2 per year containing 5 % of UV light is used the two parking lots clean the air for 13.8 g NOx/m2 yearly,

Photocat holds the right to commercially exploit 36 approved patents and 56 pending patents worldwide that protects the NOxOFF™ and actiFLOOR™ technology and application method. The technology is today available across three surface materials in Europe and North America. To date, the technology is deployed across more than 1 million square meters which on a daily basis removes 30.9 kg/NOx from the air we breathe.



Together with our partners we promote a cleaner environment through active surfaces that reduce air pollution in homes and cities by using light. Photocat and its partners provide an effective, long lasting and cost-efficient technology to reduce NOx and other pollutants where we breathe.


actiFLOOR is a treatment that can be applied to any flooring surface. The Titanium dioxide in the treatment naturally reacts to the presence of natural or artificial light. When exposed to light the surface acts as a giant natural filter. As toxic molecules come in contact with the active surface, they are naturally broken down and converted into water and carbon dioxide.

NOxOFF is a treatment on concrete, pavers and bitumen surfaces. When the sunlight hits the treated surface, the NOxOFF is activated. NOx from the air is then captured, and the sunlight is used to degrade the captured NOx via photocatalysis to nitrate. The nitrate is then washed away with rain or periodic rinsing, resulting in cleaned air.

Photocat Garden is a surface after treatment of outdoor concrete. The product’s unique and “active” surface secures an environmental concrete surface. The product is not only an impregnation but also has effect in relation to degradation of NOx.

ShineOn™ offers documented ability to make vertical glass surfaces self-cleaning. The solution is the first in the world to offer this documented effect for the aftermarket. Photocat offers this product to select applicators and delivers education, brand material, pricing calculations and the catalyst materials. The solution has been documented to remove more than 85 percent of dirt, which is in full compliance with self-cleaning standards. Documented by the Danish Technical Institute.