Anti-graffiti coating

Companies across the globe are attempting to develop coatings to prevent vandals from defacing public and private property.

Newer coatings are made of charged polymeric materials that form a gel on the surface of the building or substrate.

The materials used to make a sacrificial coating are usually inexpensive optically clear polymers such as acrylates, biopolymers, and waxes.

After the surface has been vandalized, often all that is needed to remove the paint is a simple solvent (toluene) and some manual labor.

Some of the types of permanent coatings include those based on polyurethanes, nano-particles, fluorinated hydrocarbons, or siloxanes.

The reactive groups provide locations for further chemical processing, which allow you to change the surface properties of the nanoparticles.

For anti-graffiti coatings, hydrophobic and oleophobic (oil-fearing) ligands are grafted onto the silica nanoparticles.

[5] The use of anti-graffiti barrier coatings to protect graffiti-prone historic buildings, monuments, and other culturally sensitive surfaces may seem to be an easy solution to a persistent problem.

Research suggests that the application of such coatings can cause physical or aesthetic changes or otherwise damage historic substrates.

[6] Both the National Park Service and English Heritage advise against the use of anti-graffiti coatings and promote the exercise of caution when they are applied to historic buildings and monuments.

[7][8] In the United States, many state and local historic district commissions and review boards have regulations that require approval for both graffiti removal work and the application of coatings applied to the facades on designated landmarks or properties located in local historic districts.

Alternatives to anti-graffiti barrier coatings include security measures such as night lighting and surveillance cameras, design strategies such as barrier plantings and fences, improved maintenance of the general area and rapid graffiti removal, as well as community awareness raising programs like a neighborhood watch.

[citation needed] Anti-graffiti coatings are frequently used by a number of charities that use public installations to raise money for their respective causes.