
Coatings have a role to play in combating graffiti by providing smooth sealed surfaces that prevent penetration. As the coating then becomes the layer that receives the graffiti, it in itself must be able to resist the cleaning agents and strong solvents used to remove the offending messages. This necessitates the use of very hard, densely cross-linked coatings, such as specially formulated two pack epoxies or polyurethanes with solvent resistance as their chief parameter.
Anti-graffiti paints should be specified as a system. When upgrading existing coatings some softer PVA and waterborne coatings are less tolerant to hard solvent containing topcoats so must be sealed off with multi-layers of tougher acrylics and where possible, the use of anti-graffiti topcoats with less aggressive solvents in them.
Architects Memo: anti-graffiti coatings and cleaners (pdf)
The Resene coating most commonly used as an anti-graffiti system is Resene Uracryl (see pdf Data Sheets: RA54 - RA59), which combines superb exterior durability with graffiti resistance. Although the graffiti resistance of many existing coated surfaces can be improved by overcoating with Resene Uracryl, best results are achieved when the system is applied at the time of construction.
Sealants in expansion joints should not be painted over with two pack products or cracking of the paint and then the sealant is likely. Often the method of application dictates the product to be used.
When specifying anti-graffiti coatings, bear in mind that anti-graffiti coatings will be wasted on areas inaccessible to humans, such as the seventh floor exterior walls of a building. Coatings will not develop full solvent resistance (and therefore graffiti resistance) for at least a week, longer in winter.
Projects:
Avalon Drive Bypass was finished in a Resene anti-graffiti system of two coats of Resene Uracryl 403 protecting against graffiti. Graffiti that does occur can be quickly washed off using Resene Graffiti Cleaner, leaving the Resene Uracryl 403 surface intact.
Oranga Community Centre in Oranga, Auckland combined Resene colour with anti-graffiti for the perfect solution.
Resene Graffiti Cleaner is formulated for effective and easy removal of external and interior graffiti from Resene Engineered Coating Systems anti-graffiti coatings. Very effective against common materials used for graffiti, such as spray paint, permanent markers, inks, crayons and lipsticks. For technical information view the Resene Graffiti Cleaner Data Sheet (pdf).
Resene TagCover is a custom made range of waterborne satin paints formulated to provide a budget friendly paint system to cover graffiti. Available in a standard colour range in 10L pails. Other sizes and colours available on request. Minimum quantities may apply. View standard colour range (pdf) .
Anti graffiti system (pdf)
Resene Aquapoxy, Resene Imperite 413 and Resene Uracryl 400 Series
Exterior graffiti barrier
Resene Uracryl 403 Clear has achieved APAS approval as a permanent exterior graffiti barrier.
Dealing with graffiti and tagging
For more information view Resene's dealing with graffiti web page explaining what can be done to significantly reduce graffiti and tagging.
Resene |
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Website: | www.resene.co.nz |
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