San Francisco trials pee-proof paint on buildings

City pilots liquid-repellent building paint to ensure public urination bounces back on offenders

When a person urinates against a wall, the urine bounces back.
When a person urinates against a wall, the urine bounces back.

The city of San Francisco is trialling pee-repellent paint to tackle the issue of public urination on its streets, sourced from an advanced nanotechnology company named Ultra Tech.

The paint, known as “Ultra-Ever Dry”, repels water, some oils and wet concrete due to the nanotechnology used by company to create it, and in short, when a person urinates against a wall, the urine bounces back.

The city’s public works agency has begun piloting a project that has seen walls at nine ‘hotspots’.

Public works director Mohammed Nuru told the San Francisco Chronicle that he believes the pilot will work due to the existing success of an initial implementation in Germany.

“Based on Hamburg, we know this pilot programme is going to work,” he said. “It will reduce the number of people using the walls. I really think it will deter them.”

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