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

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

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

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

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 November 11, 2018 Sikagard-850 AG

Graffiti removal Chart provided by the city of New South Wales in Australia November 11, 2018 Sikagard-850 AG

Efficiency? Aesthetic? Pollution? Graffiti removal Efficiency? Aesthetic? Pollution? Chemical cleaning Hot water cleaning Over-painting Sand blasting November 11, 2018 Sikagard-850 AG

Illegal posters pollution November 11, 2018 Sikagard-850 AG

Cost of poster removal 100’000 posters removed in Paris every year - > 3 Mio € Sydney city hall spend >1 Mio A$ a year November 11, 2018 Sikagard-850 AG

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

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 ) November 11, 2018 Sikagard-850 AG

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 November 11, 2018 Sikagard-850 AG

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 November 11, 2018 Sikagard-850 AG

Performance Parameters Solids: 90% by weight VOC: < 140 g/L Gloss: ~ 60% @ 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 graffiti @ 80 to 100 bars (1,200 psi) Can also be removed using water hose and stiff brush (but risk of damaging the protective coating) November 11, 2018 Sikagard-850 AG

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) November 11, 2018 Sikagard-850 AG

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

Physical properties of the cured coating Anti-graffiti Coating November 11, 2018 Sikagard-850 AG

Sikagard®-850 Ag is pigmentable November 11, 2018 Sikagard-850 AG

Cleaning properties November 11, 2018 Sikagard-850 AG

Cleaning properties November 11, 2018 Sikagard-850 AG

Cleaning properties November 11, 2018 Sikagard-850 AG

Cleaning properties November 11, 2018 Sikagard-850 AG

Example of cleaning November 11, 2018 Sikagard-850 AG

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 November 11, 2018 Sikagard-850 AG

Cleaning properties – ASTM D 6578 Standard Practice for Determination of Graffiti Resistance November 11, 2018 Sikagard-850 AG

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