Ceresit CT79 Impactum 1.5mm render - 25kg
What is Ceresit CT79?
Ceresit CT79 is a premium Elastomeric Silicone Render specifically designed for high-impact resistance and flexibility. It is the best choice for dark, intense colors on External Wall Insulation (EWI) systems because it resists cracking from thermal expansion and features "self-healing" properties for micro-cracks.
| Feature | Specification |
|---|---|
| Material Base | Elastomeric Silicone-Silica resins |
| Impact Resistance | Category I (highest durability) |
| Grain Size | 1.5mm (standard) |
| Coverage | Approx. 2.3 – 2.5 kg/m² |
| Solar Reflectance | Suitable for dark colors (HBW < 25%) |
| Key Benefit | Carbon fiber reinforced & self-cleaning |
| Compatible Primer | Ceresit CT16 Primer |
- Why should I choose Ceresit CT79 for dark colors?
Unlike standard renders, Ceresit CT79 is elastomeric and carbon-fiber reinforced. This allows the render to handle the high thermal stress of dark colors (low HBW values) without cracking or fading, making it ideal for modern architectural designs. - Is Ceresit CT79 impact resistant?
Yes. CT79 is rated as Category I for impact resistance. It is highly recommended for ground-floor elevations or public areas where the wall is likely to be bumped or hit, as it resists mechanical damage far better than standard silicone renders. - How does the "Self-Cleaning" effect work?
Ceresit CT79 features a high density of silicone resins which creates a "beading" effect. Rainwater simply rolls off the surface, picking up dirt and pollutants along the way, keeping the facade clean for significantly longer.
- Surface Prep: Ensure the substrate is dry and structurally sound.
- Priming: Apply Ceresit CT16 Primer tinted to the same color as your CT79.
- Mixing: Use a low-speed drill to stir. Do not over-mix as this can introduce air bubbles.
- Application: Apply with a stainless steel float at a thickness equal to the grain size.
- Texturing: Use a plastic float in circular motions to achieve a uniform "stone" texture.
- Pro-Tip on Thermal Stress: If you are using a very dark color (like Anthracite or Black), CT79 is not just an option—it is a requirement to prevent the EWI boards from warping under the render due to heat absorption.
- Pro-Tip on Maintenance: Because of the BioProtect formula, this render is highly resistant to mold and algae, making it the best choice for north-facing walls or properties near trees.
CERESIT® CT 79 render is specially recommended for applications on partitions where high-damage, operating resistance, resistance to dirt and biological corrosion is required and maintains its elasticity in a wide range of temperatures. CT79 can also be used to make thin-layer plaster coatings on concrete substrates, traditional plasters, gypsum substrates and on chipboards, gypsum boards. It is available in a wide range of CERESIT colours, including dark and intense colors. Available pack size: 25 kg