Product Data Sheet Show all documents

Sika® CoolCoat

Single component, acrylic based, flexible, micro fibre reinforced, waterproofing,  heat reflecting cum temperature reducing 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
  • 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
  • Water based hence eco friendly
Product Data Sheet Show all documents

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
 

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
  • Water based hence eco friendly

Packaging

Sika® CoolCoat : 10 kg bucket Sika® CoolCoat Primer : 2 kg bucket Sika® Fab1: Roll size of 50mx 1m (it is the reinforcement of the Coating System to be bought separately)

Colour

White

Product Details

Sustainability / Certifications / Approvals

APPROVALS / CERTIFICATES

Conforms to: IS101, IS 2645, EN 1542, ASTM D 5589, ASTM D 5590, ASTM C 1202-08, ASTM D 4587, ASTM C 836, ASTM E1980, EN-673, EN-410
Product Information

Composition

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)
System information

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 CoatSika® CoolCoat0.75 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 CoatSika® CoolCoat0.75 kg/m²

Fabric Reinforcement

Sika® Fab1

1 m²/m²

Second CoatSika® CoolCoat0.75 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 CoatSika® CoolCoat0.3 - 0.4 kg/m²

Top Coat

Sika® CoolCoat Primer

0.05 - 0.08 kg/m²

* Total consumption will however depend on the substrate quality.
Technical Information

Tensile Strength

1.5 MPa

(ASTM D 412)

Adhesion in Peel

> 1.5 MPa (on Concrete substrate)

(EN 1542)

Crack Bridging Ability

Passes upto 3.2 mm width

(ASTM C 1305)

Permeability to Water Vapour

Passes

(IS 2645)

Water Absorption

< 10% (by Mass)

(ASTM D 570)

Behaviour after Artificial Weathering

No defect  upto 500 hours exposure

(ASTM D 4587)

Microbiological Resistance

No Algae & Fungal Growth

(ASTM D 5590)

Solar Reflectance Index

102

(ASTM E 1980)

Dry film thickness

~ 1.0 mm without Sika® Fab1 ~ 1.2 mm with Sika® Fab1

Application

Application Information

Ambient Air Temperature

+10°C min/ +45°C max

Substrate Temperature

+10°C min/ +45°C max

Waiting Time / Overcoating

Sika® CoolCoat Primer: ~ 2-4 hours at +275°C (depending on humidity and ventilation) Sika® CoolCoat Coating: ~ 6 – 8 hrs at +27°C (depending on humidity and ventilation)
Application steps

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 EQUIPMENT

Clean all tools and application equipment with clean water immediately after use. Hardened / cured material can only be removed mechanically.

 

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