Problem Solving Forum
October 9 - October 15, 2016
What kind of treatment is the best defense against graffiti for rough-surfaced concrete block (CMU)?
Warren Brand of Chicago Corrosion Group on
October 13, 2016:
While I haven't used any yet, it is my understandi ...read more While I haven't used any yet, it is my understanding that there are wax-type paint systems which are sacrificial in nature. That is, when they are damaged, warm water can be used to remove a layer of the paint, along with the graffiti. To try to design a robust, chemically resistant material to resist graffiti, is, IMHO, not an optimal solution. The CMU should be block-filled and painted in whatever style the owners prefer, and the wax-type material applied as the top coat.
Farooq Ahmed of CSL Silicones Inc. on
October 12, 2016:
Use an elastomeric, room-temperature vulcanized, p ...read more Use an elastomeric, room-temperature vulcanized, polysiloxane non-sacrificial, anti-grafitti coating. The coating should be thin (low viscosity) enough to fill voids and cavities.