Anti-graffiti coatings are surface solutions that are applied to protect public areas like parks, amusement centres, and movie halls, from vandalism. This special wall paint, however, is not a guarantee that walls will be 100% graffiti-free and avoid spray paints from marking. Graffiti may be a form of art to some, but it is regulated by Australian law and there are proper places for people to draw it.
These coatings allow people to erase the graffiti without a trace, even if they apparently look firm. These are applied mainly to prevent the graffiti from sticking permanently to the substrate. Industry specialist AICoatings.com.au says anti-graffiti coatings for surfaces help protect walls by making it possible to remove graffiti quickly and easily.
There are four different types of anti-graffiti coatings: Semi-Sacrificial, Sacrificial, Non-Sacrificial and Permanent Two-Packs. Each coating has its own function and advantages, but all are proven as effective.
Sacrificial coatings are generally clear, thin-filmed emulsion or solution. These are applied over the surface directly or on top of other coatings. If the surface is defaced, any sacrificial coating is completely removable by hot water and consequently a new layer is reapplied immediately.
Semi-sacrificial coatings are naturally acrylics that shed some microns when the graffiti is washed off. After numerous cleaning cycles, further layers are essential to be applied before the original coating completely wears out and restoring the original appearance of the surface.
Non-sacrificial coatings have two types: invisible surface treatments and permanent two-packs. This coating does not form any film; rather, it modifies the wall surface tension chemically, lowering the graffiti’s adhesion. The graffiti then becomes easily removable using hot water.
The permanent type of two-pack coatings is either clear or pigmented while forming a hard and protective film all over the wall. Clear two-pack coatings present a perfect sheen or gloss while also slightly darkening a few substrates like bluestone or concrete. The graffiti is wiped out with some effective removing agents that dissolve almost everything except the two-packs coating.