Didecyldimethylammonium chloride

Anyone know where I can get Didecyldimethylammonium chloride (DDAC) near Basel or in neighbouring France/Germany. I want to use it to treat the roof to stop moss from growing on it.

Not quite the same thing, but I found this and maybe it works: https://www.jumbo.ch/de/wohnen-licht…rner/p/6945850

An Apothek?

Sagrotan in Migros.

Mellarud DE also makes an algecide containing benzalkonium cl, trideceth-9, and sodium diethylenetriamine pentamethylene phosphonate. Should work. It’s in concentrate form, which to me is more useful than lugging around a bunch of H2O.

https://mellerud.de/outdoor/algen-un…entferner-1-0l

If in doubt what I need and where I can get it, I go to Landi and ask. Landi most likely will have something.