Pee wall: An exterior wall in a public place that has been treated with urine-repellent paint. Also called anti-pee wall and pee-proof wall.
In July, the city of San Francisco, where public urination is a rife and malodorous problem, coated nine walls with a special super-hydrophobic substance called Ultra-Ever Dry. “At a molecular level,” the San Francisco Chronicle informed its readers, “the coating creates a surface texture with geometric shapes with peaks, or high points, that repel most water-based and some oil-based liquid. That means the painted surfaces will spray urine right back at the shoes and pants of unsuspecting relief-seekers.”
The concept was borrowed from Hamburg, Germany, where Ultra-Ever Dry was applied to walls in the St. Pauli district. The use of an informal/slang term for “urination” also appears to be an import.
“Hier nicht pinkeln! Wir pinkeln zurück”: “Don’t pee here! We pee back.” Image via Spiegel online.
According to the website of Ultratech International, makers of Ultra-Ever Dry:
Ultra-Ever Dry is a superhydrophobic (water) and oleophobic (hydrocarbons) coating that will repel most water-based and some oil-based liquids. Ultra-Ever Dry uses proprietary omniphobic technology to coat an object and create a surface chemistry and texture with patterns of geometric shapes that have “peaks” or “high points”. These high points repel water, some oils, wet concrete, and other liquids unlike any other coating.
San Francisco has also introduced “Pit Stop” stations to the city’s “most impacted neighborhoods,” according to the Department of Public Works website. The Pit Stop facilities operate on limited schedules, mostly weekday afternoons.
If you’re interested in the subject of public elimination, I recommend The Big Necessity: The Unmentionable World of Human Waste and Why It Matters, by Rose George, an English journalist who traveled around the world to investigate fancy flush toilets and luxurious bidets as well as the lives of the 2.6 billion people who live without any waste-disposal system whatsoever.