Sika® CoolCoat
Single component, acrylic based, flexible, micro fibre reinforced waterproofing and heat reflective coating system.
Sika® CoolCoat is a flexible, liquid applied, single component, uv and weather resistant, acrylic waterproofing membrane for all types of exposed roof slabs(new and old),terraces(sloped and flat),etc. Sika® CoolCoat contains cross-linking polymers, special glass micro fibers, pigments and advanced antifungal additive that provides long lasting tough waterproofing membrane. The high Solar Reflective Index of the membrane serves as a heat reflective surface and reduces heat ingress keeping the interior of the building cooler.
- Cross linking polymer gives excellent weather resistance and enhances service life.
- High solar reflectance index (SRI) indicates high degree of cooling effect
- Crack-bridging
Usage
Suitable for all types of :
- Roof slabs(flat and sloped)
- RCC/ asbestos/ lime terraced roofs/ clay tiles etc. after suitable surface preparation and repairs
- Sunshades
- Suitable as a heat reflective coating on bituminous membrane
- Exterior coating for PVC water tanks exposed to direct sunlight to keep the inside water temperature relatively cooler,
- External walls and balconies
Packaging
Sika® CoolCoat :10 kg x 1, 5kgx 2, 2kgx 2
Sika® CoolCoat Primer : 2kgx 2, 1 kg x 2
Sika®Fab1: Roll size of 50mx 1m (it is the reinforcement of the Coating System to be bought seperately)
Advantages
- Cross linking polymer gives excellent weather resistance and enhances service life.
- High solar reflectance index (SRI) indicates high degree of cooling effect
- Crack-bridging
- High resistance to chloride penetration, hence highly suitable for saline environment.
- Algae and fungi resistant
- Highly flexible and Vapour permeable
- Simple and fast application
- Excellent adhesion to concrete, brickwork, corrugated asbestos, bitumen,asbestos cement sheet and metal decks
- Ultra violet rays and weather resistant
- Eco friendly
Colour
White & Grey Shade.
Light shades can be achieved with help of quality stainer. Pre-test for over paintability and paint compatibility is recommended.
Product Details
Chemical Base
Acrylic polymer dispersion
Shelf Life
12 months if stored properly in undamaged and unopened original sealed pack.
Storage Conditions
Store in a cool and dry conditions.
Density
~ 1.35 kg/l @ 27°C
Solid content by weight
~ 66%
Volatile organic compound (VOC) content
< 10 g/l
Overall Thickness
~ 1- 1.2 mm (with Sika Fab1)
Chemical Base
System Structure
For Roof without Sika® Fab1
Coat | Product | Consumption |
Primer Coat | Sika® CoolCoat Primer | 0.2-0.3 kg/m² |
First Coat | Sika® CoolCoat | 0.75 kg/m² |
| Second Coat | Sika® CoolCoat | 0.75 kg/m² |
Top Coat | Sika® CoolCoat Primer | 0.05-0.08 kg/m² |
For Roof with Sika® Fab1
Coat | Product | Consumption |
Primer Coat | Sika® CoolCoat Primer | 0.2- 0.3 kg/m² |
| First Coat | Sika® CoolCoat | 0.75 kg/m² |
Fabric Reinforcement | Sika® Fab1 | 1 m²/m² |
| Second Coat | Sika® CoolCoat | 0.75 kg/m² |
| Top Coat | Sika® CoolCoat Primer | 0.05-0.08 kg/m² |
For Walls
Coat | Product | Consumption |
| Primer Coat | Sika® CoolCoat Primer | 0.2- 0.3 kg/m² |
| First Coat | Sika® CoolCoat | 0.3- 0.4 kg/m² |
Second Coat Top Coat | Sika® CoolCoat Sika® CoolCoat | 0.3- 0.4 kg/m² 0.05- 0.08 kg/m² |
* Total consumption will however depend on the substrate quality.
Tensile Strength
1.5 MPa | ASTM D412 |
Adhesion in Peel
> 1.5 MPa (on concrete substrate) | EN 1542 |
Crack Bridging Ability
Passes upto 3.2mm Width | ASTM C1305 |
Permeability to Water Vapour
Passes | IS 2645 |
Water Absorption
< 10% ( by Mass) | ASTM D570 |
Microbiological Resistance
No Algae & Fungal Growth | ASTM D5590 |
Solar Reflectance Index
102 | ASTM E1980 |
Dry film thickness
~ 1.0 mm without Sika® Fab1
~ 1.2 mm with Sika® Fab1
Application
Ambient Air Temperature
+10 °C min/ +45 °C max
Substrate Temperature
+10 °C min/ +45 °C max
Waiting Time / Overcoating
~ 6-8 hours @ +30 °C
SUBSTRATE PREPARATION
All dust, loose and friable materials and glaze or varnish of tiles must be completely removed by mechanical means. Existing coatings/ membranes have to be inspected, cleaned and mechanically ground to achieve a sound, gripping substrate. In case of bad adhesion to the substrate, existing coatings have to be removed.
In case of application on clay tiles, roughen the surface by grinding and then apply the system.
All uneven surfaces should be properly treated by suitable Sika® material to get a plain surface.
In case of application on an existing bituminous membrane following procedure has to be followed :
After ensuring that the existing membrane has been cleaned properly, apply the C.S. Primer/ Solvent based or Water based on the surface on which the system is to be applied. Sprinkle a layer of sand on the primered surface immediately and allow it to dry for atleast 12 hours. The surface is now ready to take the Sika Cool Coat System.
APPLICATION
Sika CoolCoat is supplied in a single component pack and is in ready to use form. Stir thoroughly using a conventional paint stirrer prior to application.
As a part of the System please prime the substrate with Sika CoolCoat Primer
Within 2-4 hours of priming, apply 1st coat of Sika CoolCoat by brush or roller. Do not spoil the dry surface while walking on it for application.
Place Sika® Fab1 over the first coat when it is in tacky condition
Apply the 2nd coat of Sika® CoolCoat following the same above procedure at suitable time interval of 6-8 hours between the coats.
Finally apply a thin layer of Sika® CoolCoat Primer. Suitable time interval is 6-8 hours after the second coat dries off.
The above mentioned times may vary depending on temperature, humidity and ventilation at site.
CLEANING OF TOOLS
Clean all tools and application equipment with clean water immediately after use. Hardened / cured material can only be removed mechanically.