SAN FRANCISCO (CBS SF) — People thinking of relieving themselves against nine buildings in San Francisco may want to think twice, as city crews have just finished painting nine walls with pee repellent paint.

The city plans to paint more buildings with the paint that is so water repellent, it sends urine spraying back at the person relieving their bladder.

The product by a Florida-based chemical cleanup and waste management company called, Ultra-Ever Dry by Ultra Tech, is described as “super-hydrophobic”. They say their product has practical applications; boots and gloves being the prime example.

San Francisco is notorious for its stench in some parts, stemming from those who pee in public, and is looking for solutions. The problem is a growing concern according to the Chamber of Commerce who sees it as a quality-of-life issue.

The liquid-resistant paint is already being used in places like Hamburg, Germany, known for unruliness in its red-light district. A sign hangs there that warns not to pee there because the walls will pee back.