Sikalastic®-570 Top Coat
Solar reflective PU top coat for Sikalastic® roof waterproofing systems
Sikalastic®-570 Top Coat is a 1-part, polyurethane, UV-stable, water based liquid cold-applied top coat, designed to provide a durable, colour stable highly reflective top coat for Sikalastic®-612 and Sikalastic®-614 roof waterproofing systems.
- Resistant to UV exposure – highly reflective (RAL9016) and resistant to yellowing
- Highly elastic and crack-bridging – retains flexibility even at low temperatures
- Water based with low VOC content
- 1-part, easy and ready to use
- Easily recoated – no stripping required
- Water vapour permeable – allows the substrate to breath
- Good resistance to common atmospheric chemicals
- 12 months shelf life
Usage
- UV-stable top coat for Sikalastic®-612 and Sikalastic®-614 roof waterproofing systems
- Highly reflective top coat (traffic white RAL9016) for excellent cool roof characteristics and solar roofs
- Color stable aliphatic PU topcoat for use on roofs not exposed to ponding water
Advantages
- Resistant to UV exposure – highly reflective (RAL9016) and resistant to yellowing
- Highly elastic and crack-bridging – retains flexibility even at low temperatures
- Water based with low VOC content
- 1-part, easy and ready to use
- Easily recoated – no stripping required
- Water vapour permeable – allows the substrate to breath
- Good resistance to common atmospheric chemicals
- 12 months shelf life
Packaging
5 l (~6,15 kg ) metal containers
15 l (~18,45 kg ) metal containers
Colour
Traffic White (ca.RAL 9016), Grey, Light Red, Beige, Green, Blue
Product Details
ENVIRONMENTAL INFORMATION
- Conformity with LEED v2009 SSc 7,2 (Option 1): Heat Island Effect - Roof
APPROVALS / STANDARDS
- VOC Content ISO 11890-2, Sikalastic®-570 Top Coat, eurofins, Test report No. 392-2018-00051201_XI_EN
Chemical Base
Polyurethane dispersion
Shelf Life
12 months from date of productionStorage Conditions
The product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C. Always refer to packaging.
Density
| 1,23 kg/l (at 23 °C) | (EN ISO 2811-1) |
Solid content by weight
~47 % (+23 °C / 50 % r.h.)
Solid content by volume
~34 % (+23 °C / 50 % r.h.)
Volatile organic compound (VOC) content
| ≤ 50 g/l | (ISO 11890-2) |
System Structure
Sikalastic®-570 Top Coat is applied as UV-stable coating to enhance surface appearance as well as solar reflectivity and extend durability of Sikalastic®-612 and Sikalastic®-614 waterproofing systems.
| Layer | Product | Consumption |
| 1. Primer | Refer to PDS of Sikalastic®-612 or Sikalastic®-614 | Refer to PDS of the Primer |
| 2. Waterproofing System | Sikalastic®-612 or Sikalastic®-614 applied in two coats, reinforced with Sika® Reemat Premium or Sikalastic® Fleece-120 | ≥ 2,0 l/m2 (≥ 2,8 kg/m2) in two coats |
| 3. Top coat | Sikalastic®-570 Top Coat applied in one or two coats | ≥ 0,2–0,3 l/m2 (≥ 0,25–0,375 kg/m2) |
Note: These figures are theoretical and do not include for any additional material required due to surface porosity, surface profile, variations in level and wastage.
Tensile Strength
| ~15 N/mm2 (free film) | (EN ISO 527-3) |
Solar Reflectance Index
| 108 | (ASTM E 1980) |
All values related to the reflectance/emittance properties provided in this Product Data Sheet refer to the initial (properly cured, non-weathered) status of the product
Service Temperature
-20 °C min. / +90 °C max.
Application
Ambient Air Temperature
+10 °C min. / +35 °C max.
Relative Air Humidity
80 % max.
Substrate Temperature
+5 °C min. / +60 °C max.
Dew Point
Beware of condensation. Surface temperature during application must be at least +3 °C above dew point.
Substrate Moisture Content
≤4 % moisture content.
No rising moisture according to ASTM (Polyethylene-sheet). No water / moisture / condensation on the substrate.
Waiting Time / Overcoating
Before applying Sikalastic®-570 Top Coat on Sikalastic®-612 or Sikalastic®-614 :
| Substrate Temperature | Relative Humidity | Minimum | Maximum* |
| +10 °C | 50 % | ~12 hours | 7 days |
| +20 °C | 50 % | ~6 hours | 7 days |
| +30 °C | 50 % | ~4 hours | 7 days |
* After 7 days the surface must be cleaned and primed with Sika® Bonding Primer
Before applying Sikalastic®-570 Top Coat on Sikalastic®-570 Top Coat:
| Substrate Temperature | Relative Humidity | Minimum | Maximum* |
| +10 °C | 50 % | ~8 hours | 7 days |
| +20 °C | 50 % | ~6 hours | 7 days |
| +30 °C | 50 % | ~2 hours | 7 days |
* After 7 days the surface must be cleaned and primed with Sika® Bonding Primer.
Note: Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity. Low temperature and high relative air humidity retard curing, while high temperatures and low relative air humidity accelerate curing progression.
Applied Product Ready for Use
| Substrate Temperature | Relative Humidity | Touch dry | Rain Resistant | Full cure |
| +10 °C | 50 % | ~4 hour | ~8 hours | 7 days |
| +20 °C | 50 % | ~2 hour | ~4 hours | 7 days |
| +30 °C | 50 % | ~1 hour | ~2 hours | 7 days |
Note: Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity. Low temperature and high relative air humidity retard curing, while high temperatures and low relative air humidity accelerate curing progression.
SUBSTRATE PREPARATION
The applied waterproofing system consisting of Sikalastic®-612/614 must have cured tack free and must be sound, of sufficient strength, clean, dry and free of dirt, oil, grease and other contamination.
Sikalastic®-570 Top Coat must be applied within 7 days after application of the base coat. If the overcoating time is exceeded, Sika Bonding Primer must be applied at a consumption rate of ~100 g/m2.
For detailed information regarding application of Sikalastic®-612 and 614 waterproofing systems please refer to the corresponding Product Data Sheet and Method Statement.
MIXING
Prior to application, stir Sikalastic®-570 Top Coat gently but thoroughly for 1 minute in order to achieve a homogeneous mixture.
Stirring gently will minimise air entrainment.
APPLICATION
Sikalastic®-570 Top Coat is applied in one or two coats, by roller, brush or airless spray. Prior to the application of Sikalastic®-570 Top Coat the roof waterproofing systems must have been installed and cured sufficiently. For waiting time / overcoating refer to the table above.
CLEANING OF TOOLS
Clean all tools and application equipment with water immediately after use. Hardened material can only be removed mechanically.