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Atlas Gemini RS Silicone Render Grey 25kg – BBA Certified Facade System
Product Overview
The atlas gemini rs grey is a professional-grade, fibre-reinforced silicone render designed for elevations requiring maximum structural durability and long-term aesthetic stability. Engineered as a BBA certified system component UK, this premium thin-coat finish utilizes advanced 4K aggregate technology to ensure superior adhesion and rapid texturing on-site. Specifically formulated for the challenging UK climate, it features high elasticity (3D-flex) to compensate for thermal stress and a specialized "Mirror Effect" to protect pigments against UV degradation. This atlas gemini rs render grey base 25kg is the definitive specification for high-traffic zones, commercial partitions, and residential projects where impact resistance and self-cleaning performance are non-negotiable.
Key Benefits
- ATLAS 3D-Flex Technology: Highly flexible, fibre-reinforced structure that compensates for extreme thermal deformations and rapid temperature shifts.
- Mirror Effect Protection: High light reflectance technology lowers the facade’s surface temperature, significantly reducing UV-related fading and thermal stress.
- Biosec Bio-Protection: Features "capsule" technology for the controlled release of active agents, providing long-term resistance against algae, mould, and lichen.
- Clean Technology: Advanced siloxane-based hydrophobisation creates a tight, airtight structure that repels dirt and initiates photocatalytic self-cleaning.
- 4K Formula: A unique blend of four texturing aggregates ensures excellent tool adhesion and reduces product consumption during application.
- Mechanical Resistance: Specifically recommended for areas prone to damage, such as parking zones, playgrounds, and pedestrian gates.
Technical Specifications
| Property | Value / Standard |
|---|---|
| Base Material | Siloxane-enhanced resins with 4K aggregates |
| Density | Approx. 1.7 kg/dm³ |
| Grain Size | 1.5 mm (Standard) |
| Thermal Resistance | High (compensates for -20°C to +60°C fluctuations) |
| Vapour Permeability | High (V1 according to EN 15824) |
| Water Absorption | Low (W3 according to EN 15824) |
| Adhesion | Min. 0.35 MPa |
| Compliance | BBA Certified / UKCA / EN 15824 |
Application & Compatibility
- ETICS Systems: Optimized for External Thermal Insulation Composite Systems using graphite EPS boards and mineral wool.
- Substrates: Compatible with even, properly prepared mineral substrates including concrete, traditional cement-lime renders, and cement boards.
- System Integration: Must be applied over a cured layer of Atlas Cerplast or system-matched quartz primer to ensure chemical bonding.
- Colour Versatility: Available in the full SAH range (406 colours) via individual tinting of the grey base.
Installation Notes
Substrates must be structural sound, dry, and free from contaminants. Before application, the atlas gemini rs must be mixed thoroughly with a low-speed mechanical stirrer. To ensure a flawless finish without visible join lines, maintain a "wet-edge" by completing entire elevations in a single continuous operation. During autumn and winter installations in the UK, we strongly recommend the addition of a setting accelerator to manage curing times in high humidity. Avoid application during direct intense sunlight or high winds.
Is This Product Right for Your Project?
- Choose this product if: You are rendering a commercial building, a school, or a property in a high-pollution urban area where maximum impact resistance and self-cleaning properties are required.
- Consider alternatives if: You are working on a low-exposure residential project with standard performance requirements; in these cases, our standard silicone renders may provide a more cost-effective solution.
Frequently Asked Questions
What is the coverage per 25kg tub?
For a standard 1.5mm grain size, the coverage is approximately 9.5m² to 10m² per tub. Consumption varies depending on substrate flatness and application technique.
Can this render be applied by machine?
Yes. The 1.5mm 4K aggregate structure is specifically designed to work with professional rendering units, significantly increasing site productivity for large elevations.
Does Gemini RS require a specific primer?
To maintain the BBA system warranty and ensure pigment protection, you must use a dedicated quartz primer. This regulates the suction of the basecoat and provides the necessary mechanical key for the silicone resins.
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