Ceresit CT 174 Silicate-Silicone Render 1.5mm – Crack Resistant Finish

Product Overview

Professional-grade ceresit ct174 silicate-silicone render 1.5mm UK is a high-performance hybrid decorative finish that combines the structural durability of silicate binders with the advanced flexibility of silicone resins. Specifically engineered for External Thermal Insulation Composite Systems (ETICS), this crack resistance 1.5mm grain render UK provides a breathable, hydrophobic shield for building elevations. Designed to perform in the challenging British climate, CT 174 ensures high vapour permeability and low water absorption, making it an ideal choice for properties using mineral wool or graphite EPS insulation. Its specialized "stone" texture is optimized for a uniform finish that resists environmental pollution and biological growth.

Key Benefits

• Double-Binder Technology: Hybrid silicate-silicone formula offers superior adhesion and long-term surface hardness.
• High Crack Resistance: Flexible polymer structure compensates for thermal expansion and minor structural movements.
• BioProtect Formula: Active protection against the development of algae, mould, and fungi in damp environments.
• Exceptional Breathability: High vapour permeability (V1) ensures a healthy moisture balance within the building fabric.
• Self-Cleaning Effect: Low surface tension allows rainwater to wash away dust and atmospheric dirt.
• UV & Colour Stability: Advanced mineral fillers and pigments ensure a long-lasting, fade-resistant finish.

Technical Specifications

Property	Value / Standard
Base Material	Silicate and Silicone Hybrid Resins
Grain Size	1.5 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
Average Coverage	2.5 kg/m² (~10m² per 25kg tub)
Compliance	EN 15824 / BBA System Compatible

Application & Compatibility

• ETICS Integration: Optimized for use in Ceresit Ceretherm systems over graphite EPS, Mineral Wool, or XPS insulation.
• Substrates: Suitable for 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 regulate suction and ensure bonding.
• Note: Not suitable for application on horizontal surfaces or in areas with permanent moisture exposure below the DPC.

Installation Notes

Substrates must be clean, dry, and primed at least 24 hours before application. Ceresit CT 174 should be mixed with a low-speed mechanical stirrer to reach a uniform consistency. To prevent visible join lines (lap marks), elevations must be completed in a single "wet-on-wet" operation. Avoid application during direct intense sunlight, high winds, or when rain is expected within the initial 24-hour curing period. For UK winter months, ensure that both air and substrate temperatures remain above +5°C during the entire drying process.

Is This Product Right for Your Project?

• Choose this product if: You require a high-performance, breathable finish that balances the durability of mineral renders with the flexibility of silicone technology.
• Consider alternatives if: You are rendering a high-impact plinth area; in these cases, we recommend our specialized mosaic renders for superior mechanical protection.

Frequently Asked Questions

How many tubs do I need for a 100m² project?

Based on a coverage rate of 2.5kg per m², you will typically require 10 to 11 tubs of 25kg render. We recommend adding 5% for site waste and detailing work.

Can this be applied by machine?

Yes. Ceresit CT 174 is optimized for both manual application and professional machine spraying, which significantly increases site productivity on large facade areas.

Do I need to paint this render?

No. This is a through-coloured render. The pigment is integrated throughout the mass, ensuring that it will not peel or flake like traditional masonry paint.

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