Machine Ceresit CT 174 Silica-Silicone Render 1.0mm – Vapour Permeable Finish

Product Overview

Professional-grade machine ct174 silicasilicon render 1.0mm UK is a high-performance hybrid finish specifically engineered for rapid mechanical application in External Thermal Insulation Composite Systems (ETICS). By combining the strengths of silicate and silicone binders, this machine-applied vapour permeable render UK provides a fine-grain, 1.0mm "stone" texture that ensures maximum breathability and durability for building facades. It is the ideal specification for large-scale commercial and residential projects in the UK, where high-speed site productivity must be balanced with superior resistance to biological growth and environmental pollution. Formulated with high-grade siloxanes, it creates a hydrophobic, self-cleaning surface that protects both graphite EPS and mineral wool insulation systems.

Key Benefits

• Optimized for Machine Application: Specialized 1.0mm aggregate distribution prevents nozzle clogging and ensures a consistent, high-speed finish on large elevations.
• High Vapour Permeability: Facilitates excellent moisture transfer from within the building fabric, essential for maintaining a healthy substrate.
• Double-Action Protection: Combines the structural hardness of silicate renders with the flexibility and hydrophobicity of silicone technology.
• BioProtect Formula: Active biocidal agents provide a long-term barrier against algae, fungi, and mould, even in damp coastal UK environments.
• Self-Cleaning Properties: Low surface tension allows dust and dirt to be washed away during natural precipitation cycles.
• UV & Colour Stability: Advanced mineral fillers and pigments ensure the facade maintains its aesthetic integrity without fading or peeling.

Technical Specifications

Property	Value / Standard
Base Material	Silicate-Silicone Hybrid Resin
Grain Size	1.0 mm (Stone Texture)
Density	Approx. 1.7 kg/dm³
Vapour Permeability	V1 (High) according to EN 15824
Water Absorption	W3 (Low) according to EN 15824
Adhesion to Substrate	Min. 0.35 MPa
Coverage	Approx. 1.8 – 2.1 kg/m² per layer
Compliance	BBA / ETA Certified System Component

Application & Compatibility

• System Integration: Primarily recommended for use in Ceresit Ceretherm systems over graphite EPS or Mineral Wool boards.
• Substrate Versatility: Suitable for application over reinforced basecoats on masonry, concrete, and existing well-bonded mineral renders.
• Mandatory Priming: Must be applied over a cured layer of Ceresit CT 16 quartz primer to ensure suction control and optimal machine bonding.
• Mechanical Compatibility: Specifically designed for professional rendering units (e.g., Putzmeister, PFT G4) to maximize efficiency.
• Limitations: Not suitable for application on horizontal surfaces or below the Damp Proof Course (DPC) where heavy splashing occurs.

Installation Notes

Substrates must be clean, dry, and primed at least 24 hours prior to rendering. Before pouring into the machine hopper, the material should be mixed with a low-speed stirrer to ensure a uniform consistency. During application, the spray gun must be held at a consistent distance and angle to the wall to achieve an even distribution of the 1.0mm grain. Elevations should be completed in a single continuous operation to avoid visible join lines. Avoid application during direct intense sunlight, high winds, or when rain is expected within the first 24 hours of curing. In UK winter months, always monitor humidity levels to ensure proper film formation.

Is This Product Right for Your Project?

• Choose this product if: You are a professional contractor looking to maximize site speed on a large facade and require a fine-grain, highly breathable finish.
• Consider alternatives if: You are performing a small-scale manual application or require a coarser aesthetic; in these cases, our 1.5mm silicone renders may be more suitable.

Frequently Asked Questions

What is the coverage for the 1.0mm grain?

A single 25kg tub of CT 174 1.0mm grain typically covers between 11.5m² and 13.5m², depending on the substrate flatness and machine pressure settings. This is more efficient than standard 1.5mm grains.

Do I have to apply it by machine?

While CT 174 1.0mm is specifically optimized for machines, it can also be applied manually with a stainless steel float. However, for the most uniform fine-grain finish, machine spraying is recommended.

Is it compatible with other brands?

To maintain full system warranties and BBA certification, CT 174 should be used alongside Ceresit adhesives and primers. Using mismatched components can lead to poor adhesion or colour inconsistencies.

For professional results, always source your silicone render primers and reinforcement components directly from our certified range.