San Francisco UED

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San Francisco is using pee-repellant paint on walls to combat public urinators

San Francisco is adding pee-repelling paint to walls in order to keep streets clean, similar to what's been used in Hamburg's St. Pauli district in Germany.

San Francisco is adding pee-repelling paint to walls in order to keep streets clean, similar to what’s been used in Hamburg’s St. Pauli district in Germany.

Be careful where you pee in San Francisco because it might splash right back at you.

San Francisco’s Department of Public Works recently announced that it is coating nine walls around the city with hydrophobic paint to help combat public urinators.

The Ultra-Ever Dry paint is a waterproof paint that works as a repellant of liquids. It can coat any surface and it has been used before on paper and other fabrics.

The Department of Public Works coated walls located around the Mission and SOMA districts, but is looking to expand the paint job if the pilot program is a success. However, each coated wall costs several hundred dollars, according to the San Francisco Chronicle.

“The team that did the testing (were) excited because the liquid bounces back more than we thought it would,” Public Works chief Mohammed Nuru told the Chronicle. “We will send people to see, visually, if there are any wet signs to indicate urination has happened.”

San Francisco is not the first city to implement urine-repelling paint. The city of  Hamburg, Germany has also used the paint and saw a decrease in people who use the streets as a bathroom.

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

Aside from the wall coating, the city is also introducing Pit Stop stations to offer public, portable toilets and sinks during certain hours.

Ultra Ever Dry Prevents Accumulation of Bird Dropping & Bat Guano

I recently ran across this blog: 

Hazardous Poop! Look Out! Dangerous Bird and Bat Poop!

It describes the need to be aware of the dangers of working in high places where such contamination tends to collect and where cleanup is highly unlikely.

Basically, bird droppings and bat guano are even more dangerous when dry. Dried animal waste becomes dust that gets into your eyes, nose and mouth, as well as on clothing, footwear, gloves, and PPE. It gets into your hair, follows you into your truck and more. 

Dust carries agents that cause respiratory and intestinal diseases like bird Flu, Histoplasmosis, Cryptococcosis, Psittacosis and Candidiasis, as well as nasty things like E.coli, germs and insects associated with animal waste. 

Exposure to such nasties CAN be prevented, with application and annual touch-ups of Ultra Ever Dry coatings. 

Applying Ultra Ever Dry to surfaces prevents the accumulation of such droppings which, in turn, prevents the damage to underlying surfaces and – more importantly – avoids exposing workers to the health hazards associated with such contaminants. Tower climbers have enough safety risks to worry about.

As a bonus, Ultra Ever Dry prevents ice accumulation as well. Something to think about when you are a climber, not only relying on the safety of the surface you are climbing, but also on the ability of the fall protection hardware (SRLs, snaphooks, carabiners, buckles etc.) you are using to avoid freezing up and becoming unreliable in harsh weather. 



See the links below for health & safety resources for dealing with bird droppings and bat guano (taken from the Hazardous Poop blog post):

Military Applications in the Field Also Great for Camping (or Glamping)

Recently, UltraTech International (maker of Ultra Ever Dry) entered a partnership with Luna Industries to present Ultra EverShield treated fabric (similar to Ultra Ever Dry) for the purpose of providing Military First Responders with suitable PPE clothing made of fabric designed to prevent contamination from various chemical and biological agents during field use. 

Ultra Ever Dry works wonderfully on Canvas. Click to read previous Ultra Ever Dry Lab post “ULTRA EVER-DRY PROTECTS CANVAS AND TEXTILES”  or my previous Blog post PROTECTION FOR MARINE VEHICLESfor more details on how Ultra Ever Dry works to protect fabrics exposed to extreme weather conditions and biological contaminants (such as spills from the s’mores you just cooked over an open fire, bird droppings on the tent flaps or water-caused mold & mildew damage). 

Understanding Ultra Ever Dry

Ultra Ever Dry was recently featured on television, announcing recent testing and development for use on automotive frames with Nissan.

The footage is amazing, but you need to have in-depth knowledge of Ultra Ever Dry to truly understand what you are seeing.

See video at:


Maxx Sales has that knowledge. The car being tested is white, because Ultra Ever Dry is not a clear coating. The two-coat water and oil repellent system uses chemicals that leave a translucent finish color (milky white) when cured. That is why Maxx Sales does not recommend the use of Ultra Ever Dry on visible portions of your vehicle. In addition, the coating will break down over time (between six months and seven years, depending on where and how it Is used) and  will eventually require touch up application. These details do not detract from the amazing superhydrophobic properties of Ultra Ever Dry, but they do introduce the need for situational awareness and true product knowledge when deciding you your Ultra Ever Dry project.

Maxx Sales can help. Maxx customers receive a free, HONEST consultation to help you formulate the best way to apply and to use Ultra Ever Dry. They’ll tell you frankly if Ultra Ever Dry is well-suited(or ill-suited) for your intended use. They’ll also help you choose the best places to apply the product, give you an estimate of how much Ultra Ever Dry you’ll need, make sure you understand how to apply Ultra Ever Dry correctly, and where you’ll likely need touch ups later. Contact Maxx Sales 360-335-3961 or

Summer UED application will save time & money this winter

Yes. It. Will. An AMAZING amount of time, energy and money is wasted in repair and remediation of equipment AFTER ice accumulates and causes damage. Even though it’s summer, it makes sense (and dollars and cents) to protect equipment with Ultra Ever Dry to PREVENT damage from ice accumulation this winter.

According to an independent scientific study (abstract and citation below), “Prevention of ice accretion and adhesion on surfaces is relevant to many applications, leading to improved operation safety, increased energy efficiency, and cost reduction. Development of passive nonicing coatings is highly desirable, since current antiicing strategies are energy and cost intensive. Superhydrophobicity has been proposed as a lead passive nonicing strategy.”

Parabolic Antennas, Satellite Dishes, Radomes, Steel Towers, Bridges and Cables can be protected from ice accretion using Ultra Ever Dry, a superhydrophobic and oleophobic coating. This microthin coating prevents corrosion and creates a barrier to moisture, but not to vapors and electrical currents, preventing corrosion, mold and mildew growth, mud buildup and – importantly – ice accretion.


Study Abstract and Citation:

Dynamics of Ice Nucleation on Water Repellent Surfaces:

Prevention of ice accretion and adhesion on surfaces is relevant to many applications, leading to improved operation safety, increased energy efficiency, and cost reduction. Development of passive nonicing coatings is highly desirable, since current antiicing strategies are energy and cost intensive. Superhydrophobicity has been proposed as a lead passive nonicing strategy, yet the exact mechanism of delayed icing on these surfaces is not clearly understood. In this work, we present an in-depth analysis of ice formation dynamics upon water droplet impact on surfaces with different wettabilities. We experimentally demonstrate that ice nucleation under low-humidity conditions can be delayed through control of surface chemistry and texture. Combining infrared (IR) thermometry and high-speed photography, we observe that the reduction of water–surface contact area on superhydrophobic surfaces plays a dual role in delaying nucleation: first by reducing heat transfer and second by reducing the probability of heterogeneous nucleation at the water–substrate interface.

Azar Alizadeh, Masako Yamada, Ri Li, Wen Shang, Shourya Ott , Sheng Zhong, Liehui Ge, Ali Dhinojwala, Ken R. Conway, Vaibhav Bahadur, A. Joseph Vinciquerra, Brian Stephens, and Margaret L. Blohm
Langmuir, 2012, 28 (6), pp 3180–3186
DOI: 10.1021/la2045256
Publication Date (Web): January 11, 2012
Copyright © 2012 American Chemical Society

How does Ultra Ever Dry work to repel water so completely?

The unique roughness of superhydrophobic surface forces water droplets into spherical drops that minimize contact with the surface, rolling off easily and carrying away dirt and other debris, leaving the surface clean. Water drops roll off surfaces, even porous ones.

water drops on superhydrophobic coated screen

Illustration: a screen door treated with superhydrophobic coating. Even though the mesh is porous, water drops do not pass through due to the extreme water repellency of the superhydrophobic coating.

Copyright ©Flickr, U.S. Department of Energy, Oak Ridge National Laboratory