https://www.noticiasaominuto.com/pais/1433395/metro-de-lisboa-des...

https://www.noticiasaominuto.com/pais/1433395/metro-de-lisboa-desinfetado-com-produto-que-tem-efeito-durante-um-mes

The link reads in part (Google Translation)

Metro's official source added to Lusa that all stations - Green, Red, Blue and Yellow - will be disinfected by Wednesday.

"This, in fact, is a very effective product, a product that kills all microorganisms and, therefore, bacteria and viruses, and that achieves that same security for a month. There is a film that is formed around the surfaces where it is applied ", explained Matos Fernandes.

....

According to a note sent by Metro de Lisboa, the product being used is called Microbe Shield Z-71, from the Zoono brand , and reveals "an efficiency greater than 99.99% after five minutes".

The same statement indicates that the disinfectant "does not contain alcohol or harmful chemicals" and "proves to be more effective than other disinfectants with a lasting and prolonged action , keeping the biocidal effect active for up to 30 days".