Sikagard® WallCoat AS-12 Hygienic
Single component, waterborne, low emitting, acrylic resin wall coating
Sikagard®-Wallcoat WS-12 Hygienc is a wallcoating system, based on waterborne modified acrylic resin containing an in film preservative to protect the coating from attack and degradation by bacteria, funghi, mould, yeast and algae.
- Seamless, easy to clean finish
- mid-sheen or matt finish, depending on the top coat used
- Very low emission of VOC
- Good resistance to repeated cleaning regimes using mild detergents and cleaning solutions
- no degradation of the film caused by bacteria, funghi, mould, yeast and algae
- Tough and highly durable
- Good water vapour permeability
- More flexible in comparison to standard acrylic systems, improves the resistance to cracking and flaking
- Solvent free
- Good opacity
- Odourless
- Easy to apply
System Structure
Usage
- Application on concrete, bricks, cement and gypsum based substrates, metal surfaces, timber, tiles and plastic
- Suitable for production facilities in the pharmaceutical, medical engineering, food and beverage industry, hospitals, prisons, healthcare and leisure facilities
Advantages
- Seamless, easy to clean finish
- mid-sheen or matt finish, depending on the top coat used
- Very low emission of VOC
- Good resistance to repeated cleaning regimes using mild detergents and cleaning solutions
- no degradation of the film caused by bacteria, funghi, mould, yeast and algae
- Tough and highly durable
- Good water vapour permeability
- More flexible in comparison to standard acrylic systems, improves the resistance to cracking and flaking
- Solvent free
- Good opacity
- Odourless
- Easy to apply
Colour
Standard colour: white.
Other colours are available on request.
Appearance
| Top Coat | Appearance |
| Sikagard®-405 W | mid-sheen |
| Sikagard®-406 W | matt |
| Sikagard®-407 W | gloss |
System Details
ENVIRONMENTAL INFORMATION
- According USGBC LEED Rating Sikagard® Wallcoat AS-12 Hygienic conforms to the requirements of LEED
EQ Credit 4.2: Low –Emitting Materials: Paints & Coatings SCAQMD Method 304-91
VOC Content < 100g/l
APPROVALS / STANDARDS
- Eurofins, test report, VOC emission acc. French regulations Decret DEVL 11019093D, March 23, 2011 and Decret DEVL 11034675A, see Product Data Sheets of products used
- PRA, test report, gloss, fineness, grind wet scrub resistance and contrast ratio acc. EN 13300, see Product Data Sheet of product used as top coat
- Test Institute Hoch, test report No. KB-Hoch-160714, classification reaction to fire acc. according EN 13501-1, June 2016
- IMSL, test report No.2014/02/011.1a-1, determination of antibacterial activity acc. ISO 22196, see Product Data Sheet of product used as top coat
- KIWA, test report No.: P 10108, determination of crack bridging properties according EN 1062-7, April 2016
- IMSL, test report, determination of the resistance of surface coatings to mould growth according BS 3900 Part G6, see Product Data Sheet of product used as top coat
- CampdenBRI, sensory evaluation odf choclate to test the taint potential, using the triangle test method according TES-S—002 odour transfer method, see Product Data Sheet of product used as top coat
System Structure
Sikagard® WallCoat AS-12 Hygienic
| 1. Primer / Base coat | Sika® Bonding Primer |
| 2. Intermediate | Sikagard®-403W |
| 3. Top coat | Sikagard®-405 W, or Sikagard®-406 W, or Sikagard®-407 W |
Composition
Acrylic Copolymer Dispersion, waterborne
Nominal thickness
250µm–300µm
Crack Bridging Ability
| class A2 (up to 0.28mm) | (EN 1062-7) |
Reaction to Fire
| C-s1, d0 | (EN 13505-1) |
Chemical Resistance
Good resistance to mild acids, alkalis, cleaning agents and disinfectants. Please contact local Sika technical service for specific information.
Disinfection with Hydrogen Peroxide Vapor:
- Resistant when using STERIS VHP technology
- Resistant to PEA vaporisation technology according test report PEA, max. 5 hours
- Resistant when using Oxypharm vaporiser NOCOSPRAY® with the following set-up:
| Disinfectant | Concentration | Setting at vaporiser | Contact time |
| NOCOLYSE® Mint (6 %) | 1 ml/m³ | 20m³ (1.5 min vaporisation) | 30 min |
| NOCOLYSE® ONE Shot (12 %) | 3 ml/m³ (2 cycles) | 45m³ (5 minutes vaporisation) | 30 min |
| NOCOLYSE® Food (7.9 %) | 1 ml/m³ | 20m³ (1.5 minutes vaporisation | 30 min |
| NOCOLYSE® Food (7.9 %) | 5 ml/m³ | 75m³ (5 minutes vaporisation) | 60 min |
- Resistant to disinfection of hydrogen peroxide vapour of Bioquell VHP systems (only in case Sikagard®-407 W used as a top coat)
Application
Product Temperature
+8 °C min. / +30 °C max.
Ambient Air Temperature
+8 °C min. / +40 °C max.
Relative Air Humidity
≤80 %
Dew Point
Beware of condensation!
The substrate temperature and uncured material must be at least 3 °C above dew point to reduce risk of condensation
Substrate Temperature
+8 °C min. / +35 °C max.
Substrate Moisture Content
Substrate shall be visible dry, no rinsing water
Waiting Time / Overcoating
Between application of the different layers allow:
| Temperature | Minimum | Maximum |
| +10 °C | 4 h | 7 d |
| +20 °C | 2 h | 7 d |
| +30 °C | 1 h | 7 d |
Applied Product Ready for Use
Minimum 72 hours at +20 °C
Lower temperatures may lead to longer curing times
Consumption
| Product | Consumption |
| Sika® Bonding Primer | ~0.10 kg/m² (~0.10 L/m2) |
| Sikagard®-403 W | ~0.28 kg/m² (~0.20 L/m2) |
| Sikagard®-405 W, or Sikagard®-406 W, or Sikagard®-407 W | ~0.20 kg/m² per layer* |
* A minimum of 2 layers is recommended.
CLEANING
The top coats are tested in accordance to EN 11998:2006 related to wet scrub resistance.
According EN 13300 the product is classified in class 1, which is the highest wet scrub resistance class. Therefore the surface can be cleaned with a wet sponge, using mild detergents and rewashed with clean water.