1. Sikagard-850 AG anti-graffiti
June 2018 Sika south africa
Sika services za / tm refurbishment

2. Agenda Introduction Cost of graffiti removal
Technich of graffiti removal
Types of anti-graffiti coatings
Sikagard-850 AG
November 11, 2018
Sikagard-850 AG

3. introduction Street Art or Vandalism? November 11, 2018
Sikagard-850 AG

4. introduction Street Art or Vandalism? November 11, 2018
Sikagard-850 AG

5. Cost of removal Graffiti cost Londoners £ 100m a year1
In UK, graffiti removal cost £ 1 billions a year2
In France, estimation of cost to more than 10 millions Euros per year3
In US, graffiti cost removal is estimated to $ 1.3 billion per year4
Source:
1: Southwark council webpage
2: BBC News May 2002
3: French Senat Journal officiel 2001
4: The Norgrad Network
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Sikagard-850 AG

6. Graffiti removal
Chart provided by the city of New South Wales in Australia
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Sikagard-850 AG

7. Efficiency? Aesthetic? Pollution?
Graffiti removal
Efficiency?
Aesthetic?
Pollution?
Chemical cleaning
Hot water cleaning
Over-painting
Sand blasting
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Sikagard-850 AG

8. Illegal posters pollution
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Sikagard-850 AG

9. Cost of poster removal
100’000 posters removed in Paris every year - > 3 Mio €
Sydney city hall spend >1 Mio A$ a year
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Sikagard-850 AG

10. Types of anti-graffiting coatings
Sacrificial Coatings:
Hard polymer based
Soft, sacrificial acrylic topcoat
Wax based either alone or combined with siloxane
Permanent Coatings:
Aliphatic polyurethane over primer (typically required chemical cleaner)
Modified siloxane (required also chemical cleaner)
November 11, 2018
Sikagard-850 AG

11. Types of anti-graffiting coatings
Sacrificial / semi sacrificial Coatings:
Hard polymer: Sikagard AG (Canada)
Soft, sacrificial acrylic topcoat
Wax based: Mapei WallGard Graffiti Barrier, Sikagard-781 S (Poland), Sikagard-777 (Sweden)
Permanent Coatings:
Aliphatic polyurethane over primer (typically required chemical cleaner) (e.g. SikaCor EG-5 although not marketed as such was used successfully in some countries)
Modified siloxane (required also chemical cleaner) (Evonik Antigraffiti )
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Sikagard-850 AG

12. New Sikagard-850 AG
Clear, one-component, moisture-cured, silicone elastomer anti-graffiti coating that can be applied by brush, roller and professional spray equipment to exterior concrete, masonry and metal surfaces.
A permanent coating that does not need to be recoated after graffiti removal like alternative sacrificial systems.
No chemical cleaning required
No hot water
Only brush and water or cold low water pressure (80 bars)
Added values:
Prevent poster to bond
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Sikagard-850 AG

13. Field of application Civil Engineering Structures
Highways authorities (bridges, sound barrier, rest areas)
Schools and Universities
Port authorities
Transit authorities – subway, bus and train depots
Transportation – railcars
Parking decks
Urban commercial properties
Immediate release for Professional – Professional packing
Repacking in small volume (e.g. 5 l pail) currently under investigation
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Sikagard-850 AG

14. Performance Parameters
Solids: 90% by weight
VOC: < 140 g/L
Gloss: ~ 60°
Dry to touch: < 2 hrs.
Tack Free: < 4 hrs.
Anti-graffiti properties: 24 hrs
Can be recoated with itself (e.g. after mechanical damage of the coating)
Cold water removal of 80 to 100 bars (1,200 psi)
Can also be removed using water hose and stiff brush (but risk of damaging the protective coating)
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Sikagard-850 AG

15. Physical properties of the cured coating
High UV Resistance
Excellent Gloss Retention
Low VOC formulation
Water vapor breathable
Heat Resistance
Enduring Release Properties
Elastomeric Properties
Hydrophobicity
Can be tinted with pigment compatible with solvent based coating
Vapor breathable (Sd H2O = 0.37 m for 400g/m2)
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Sikagard-850 AG

16. Sikagard-850 AG INORGANIC POLYMER ORGANIC POLYMER November 11, 2018

17. Physical properties of the cured coating
Anti-graffiti Coating
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Sikagard-850 AG

18. Sikagard®-850 Ag is pigmentable
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Sikagard-850 AG

19. Cleaning properties
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Sikagard-850 AG

20. Cleaning properties
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Sikagard-850 AG

21. Cleaning properties
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Sikagard-850 AG

22. Cleaning properties
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Sikagard-850 AG

23. Example of cleaning
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Sikagard-850 AG

24. Cleaning properties – ASTM D 7089
Standard Practice Determination of the Effectiveness of Anti-Graffiti Coating for Use on Concrete, Masonry and Natural Stone Surfaces by Pressure Washing
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Sikagard-850 AG

25. Cleaning properties – ASTM D 6578
Standard Practice for Determination of Graffiti Resistance
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Sikagard-850 AG

26. Key points Graffiti removal with water pressure or with stiff brush
Durable film for exterior exposure
“Permanent” protection – no need for recoating after cleaning the graffiti
Flexible at low temperatures
Use on mineral and wooden substrate
Use of coated surfaces
Ease of application
Can be recoated with itself
Water vapor breathable film
Sag Resistant
Can be tinted
Hydrophobic behavior – no water penetration
Heat Stable
November 11, 2018
Sikagard-850 AG