Sikatherm®-611 Render
LIGHTWEIGHT INSULATION PLASTER
Sikatherm®-611 Render is an insulating system designed for external facades of houses, buildings, or other structures as well as internal partitions or ceilings. It is applied in the same way as a wall plaster onto exterior and interior surfaces manually with hand trowelling tools and/or machine.
- Excellent thermal insulation
- Good acoustic insulation
- Fire-resistant
- Water repellent to avoid loss of insultion properties after rain
- Certified Green Label by Singapore Green Building Council
Usage
- Suitable for both internal and external wall application.
- Compatible with commonly used tile adhesives and waterproof membranes.
Advantages
- Excellent thermal insulation
- Good acoustic insulation
- Fire-resistant
- Water repellent to avoid loss of insultion properties after rain
- Certified Green Label by Singapore Green Building Council
Packaging
15 Kg
Product Details
Chemical Base
Cementitious mixture and EPS beads
Shelf Life
12 months from manufacture date
Storage Conditions
Store properly in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C. Protect from direct sunlight.
Density
| Crushed EPS Beads | Virgin EPS Beads |
| 170 - 200 kg/m³ | 260 - 280 kg/m³ |
Compressive Strength
| 0.7 N/mm² | (BS EN 1015-11: 2019) |
Tensile Adhesion Strength
| 0.2 N/mm² | (BS EN 1015-12:2016) |
Resistance to fire
| Non-combustible, Class A2-s1, d0 | (BS EN 13501-1: 2018) |
Permeability to Water Vapour
Water Vapour Diffusion
| 3,606 | (BS EN 1015-19: 2019) |
Capillary Absorption
| 0.2 kg/m² min.0.5 | (BS EN 1015-18:2002) |
Thermal Conductivity
| ≤ 0.060 W/(m.K) | (ASTM C518: 2021) |
Sound Insulation
| Noise Reduction Cefficient, NRC | Sound Absorption Average, SAA (200Hz - 2500Hz) |
| 0.20 | 0.21 |
Application
Mixing Ratio
| Material | Weight | ||||||
| Sikatherm®-611 Render | 15 kg | ||||||
| EPS Beads |
| ||||||
| Water |
|
Ambient Air Temperature
+6 °C min / +40 °C max.
Substrate Temperature
+6 °C min / +40 °C max.
Pot Life
60 - 120 min (depending on ambient conditions)
MIXING
Pan Mixing
- Mixing blade should be about 2 mm above the base of the drum.
- Pan mixer with a minimum capacity of 150 Ltr is required for mixing.
- Prepare a clean empty container and pour in 80% of the required water.
- Pour the Sikatherm®-611 Render powder into the container, use the hand mixer to mix until a homogenous slurry is achieved. Small quantity of EPS beads can be added to ease the mixing.
- Load the remaining EPS beads followed by the slurry into the pan mixer.
- Start the pan mixer and mix continuously for 5 – 10 minutes until homogenous consistency is achieve. Remaining 20% water can be used to adjust the consistency of the mixture.
Hand Mixing
- Prepare a flat bottom container with 75 Ltr capacity.
- Pour 80% of the required water into the container.
- Pour in Sikatherm®-611 Render into container and start hand mixer to mix until homogenous slurry is achieved.
- Pour the EPS beads into the container and mix until a homogenous consistency.
- Ensure that the hand mixer is moved around to have proper mixing.
- Remaining 20% water can be used to adjust the consistency of the mixture.
IMPORTANT: If mixing in partial batches, ensure the measurement of powder, EPS beads and water ratio are accurate.
APPLICATION
By hand
The material from the bucket or wheelbarrow is applied with a masonry spatula/trowel directly to the wall surface by throwing and not pressing too hard like conventional plaster. The applied material is smoothed with a long aluminium slat. Leave the prepared surface to dry.
First, spread a thin (approximately 3 - 4 mm) contact layer to serve as an adhesive bridge. In this way, the surface will be cleaned of dust.
Leave this thin layer to dry until next day before applying next layer. Continue to apply Sikatherm®-611 Render in maximum layers of 4 - 5cm until the desired thickness is reached. Necessary hardening time between layer applications must be observed. Depending on weather conditions, setting may take 6 to 24 hours.
Smoothening of the Surface and Final layers
The final stage is to level and smooth the surface, but this can only be done when the material has hardened. Hardening time may take approx. 24 to 72 hours, depending on weather conditions. For any surface unevenness, sandpaper can be used to level the surface if necessary.
For protective or final layer: Apply up to 3 layers of SikaWall®-178 if necessary. Sika Waterproofing products can be added if needed. Such additional layers can be applied after the final layers have been cured for 7 days.
CLEANING OF TOOLS
- Clean mixing and application equipment with water immediately following use.
- Remove splatter or spills with water before material sets.