What the City of Graz has published
The City of Graz named ZikaSeal in its own press release of 20 May 2026, when the barriers went into the city’s catch basins. Eva Winter, head of the city’s Gesundheitsamt, described the mechanism there: “Das Prinzip erinnert an eine Herzklappe” — the principle is reminiscent of a heart valve. Robert Krotzer, the city councillor for health, called the installation of the ZikaSeal system one more concrete piece in the city’s mosaic of measures. City of Graz, press release, 20 May 2026.
The city’s official Maßnahmenplan 2026 names the project on page 24 and describes it as carried out by the Gesundheitsamt, Holding Graz – Kanal and ZikaSeal. The city states its own reason for testing the barriers: so that “die aufwendige BTI-Einbringung eingespart werden kann” — so that the laborious Bti application can be saved. City of Graz, Maßnahmenplan 2026 (PDF).
ORF Steiermark reported on 18 June 2026 that the pilot project with the ZikaSeals had proved itself. The report gives no figures, and the same piece notes that Graz does not have the funds for a city-wide rollout. ORF Steiermark, 18 June 2026.