Description
Ceresit CT 74 Silicone Render White 1.5 mm — Self-Cleaning Facade Finish (25 kg)
Classified V1 for vapour permeability and W3 for water absorption under EN 15824:2017, Ceresit CT 74 Silicone Render White 1.5 mm is a ready-mixed, self-cleaning decorative finish that covers approximately 10–12 m² per 25 kg tub at a consumption rate of 2.1–2.5 kg/m². Part of the premium silicone render collection, this product combines Henkel's Double Dry Technology with a BioProtect formula — the hydrophobic surface sheds dirt with natural rainfall while the integrated biocide shield resists algae, mould, and fungal colonisation for the lifetime of the coat. Adhesion reaches 0.6 MPa (well above the 0.35 MPa minimum), and fire classification up to A2-s1,d0 on mineral wool systems per EN 13501-1:2018 provides the compliance documentation that Building Control, NHBC inspectors, and warranty providers typically require. Certification under BBA Certificate No. 14/5142 (DoP 00264) confirms the full Ceretherm system performance.
Available in the full Ceresit Colours of Nature palette, every tub is tinted on a dedicated Ceresit mixing machine at our Southampton warehouse and dispatched next day. Our team also mixes bespoke colours to order on the same equipment — matching RAL codes, NCS references, or shades from other manufacturers' palettes — so your project gets exactly the tone it needs without a remote factory lead time. The brilliant white base provides the brightest starting point for light and pastel tones, and the UV-stable pigments resist yellowing even on south-facing elevations exposed to sustained sunlight. Browse the colour charts and sample catalogues to confirm your shade on a physical rendered swatch before ordering.
Key Benefits
- Self-Cleaning Facade That Stays Clean for Years: Double Dry Technology creates a hydrophobic surface that sheds dirt with natural rainfall, keeping your elevation clean year after year with virtually no manual washing required — a genuine advantage on exposed, coastal, and high-pollution urban facades.
- Walls That Breathe Freely: V1-rated vapour permeability with an Sd value of just 0.14 m lets moisture escape from the wall at a very high rate, so damp walls dry out rather than trapping condensation behind the finish — making CT 74 suitable for both modern ETICS systems and older solid-wall properties.
- Rainwater Runs Off, Not In: W3 water absorption rating means wind-driven rain runs off instead of soaking in, with a 24-hour absorption value below 0.5 kg/m² — so even exposed elevations stay dry and protected through the most persistent UK weather.
- Built-In Biological Defence: BioProtect formula actively resists algae, mould, and fungal colonisation, keeping facades in damp, shaded, or north-facing locations visually clean for far longer than standard renders without separate biocide treatments.
- Crack-Resistant Flexibility: High elasticity from the silicone resin binder absorbs thermal movement and minor substrate shifts, delivering impact resistance to Category I–II under ETAG 004 — so the finish stays intact through UK freeze-thaw cycles without surface repairs.
- Colours Mixed to Order on a Dedicated Machine: The full Ceresit Colours of Nature palette is tinted on a dedicated Ceresit mixing machine at our warehouse, and bespoke colours matched to RAL, NCS, or other manufacturers' references are mixed to order on the same equipment — every tub arrives ready to apply with next-day UK dispatch.
- Proven Professional Efficiency: Compatible with both hand and machine application (Wagner PC 15, PC 830, SPG PG 20 with 6–10 mm nozzle), so large-scale projects benefit from faster installation without compromising finish quality — machine application reduces consumption slightly for better material economy on commercial elevations.
Technical Specifications
| Property | Value |
|---|---|
| Pack Size | 25 kg (Eco Bucket — up to 62% PCR polypropylene) |
| Base Material | Water dispersion of silicone and acrylic resins with mineral fillers |
| Grain Size | 1.5 mm (stone texture) |
| Density | 1.7 kg/dm³ |
| Coverage | 2.1–2.5 kg/m² (approx. 10–12 m² per tub) |
| Vapour Permeability | V1 (high) — Sd ≤ 0.14 m to EN 15824 |
| Water Absorption | W3 (low) — w ≤ 0.1 kg/m²·h⁰·⁵ to EN 15824 |
| Adhesion to Substrate | 0.6 MPa (≥ 0.08 MPa after ageing) |
| Thermal Conductivity | ≤ 0.61 W/(m·K) |
| Impact Resistance | Category I–II (system-dependent) per ETAG 004 |
| Fire Classification | A2-s1,d0 (MW system) / B-s1,d0 (EPS) per EN 13501-1:2018 |
| Application Temperature | +5 °C to +25 °C |
| Open Time | Approx. 15 min |
| Rain Resistance | 24–48 h (temperature-dependent) |
| Colour Range | Full Ceresit Colours of Nature palette plus bespoke matching |
| Shelf Life | 12 months (stored dry, cool, frost-free) |
| Compliance | EN 15824:2017 · DoP 00264 · BBA Certificate 14/5142 |
Application and Compatibility
Ceresit CT 74 bonds reliably to a wide range of substrates when paired with the right primer system. For walls with cured cement or lime-cement render (at least 28 days old) and for concrete substrates (at least 3 months old), apply Ceresit CT 16 quartz primer from the exterior render primers range and allow it to dry fully before rendering. On absorbent substrates, a preliminary coat of Ceresit CT 17 deep-penetration primer followed by CT 16 after a minimum 2-hour interval ensures even suction and a uniform finish.
- ETICS Integration: Designed as the decorative finish layer within Ceresit Ceretherm systems — apply over a reinforced basecoat primed with CT 16 after a minimum 3-day cure. Pair with fibreglass mesh at 150 g/m² in the reinforcement layer to create a continuous, crack-resistant base for the topcoat.
- Traditional Masonry: Works on properly prepared concrete, brick, and blockwork substrates where CT 16 quartz primer has been applied — matching the primer tint to the render shade gives a consistent tonal base, especially important on white finishes where substrate variation shows through.
- Machine Application: Compatible with Wagner PC 15, PC 830, and SPG PG 20 rendering units with a 6–10 mm nozzle at up to 40 bar, delivering approximately 8–10 l/min — ideal for large commercial elevations where speed and consistency matter most.
- Dark-Colour Guidance: For intense dark colours on large south-facing facades, Ceresit CT 76 Solar Protect is specifically formulated with heat-reflective pigments to manage the additional thermal load — CT 74 performs confidently in mid-range and lighter shades on any orientation.
Installation Notes
Stir the entire tub contents thoroughly with a low-speed drill mixer before application — add no more than 1% clean water if the consistency needs slight adjustment. Apply CT 74 at the thickness of the 1.5 mm grain using a stainless-steel float held at an angle, then form the stone-like texture with circular movements using a plastic float held flat against the surface. For the cleanest result, work each elevation in a single wet-on-wet pass rather than breaking the surface into separate sessions.
- Managing Breaks: If a break is unavoidable, press self-adhesive tape along the joint line before pausing and restart from the taped edge — this keeps the join invisible on the finished facade.
- Weather Window: Apply above +5 °C and below 80% humidity, and check a 48-hour weather forecast before starting to ensure rain stays clear during the critical first 24–48 hours of cure for a flawless surface.
Trade Insight — Installer's Note
Always match the CT 16 primer tint to the final render colour — it takes five minutes of planning and saves callbacks on shading inconsistencies, especially on white finishes where even slight substrate variation shows through. With CT 74's 15-minute open time, the key is keeping two people moving on the same elevation: one applying, one texturing. Coverage sits reliably around 2.3 kg/m² on a well-primed surface, so a single 25 kg tub gives you roughly 10–11 m² — order 5% extra for window reveals and detailing. For winter rendering between 0 °C and +5 °C, pairing CT 74 with Atlas Eskimo setting accelerator keeps the curing window manageable and maintains your site schedule through the colder months. If a client needs a facade refresh after 15+ years, Ceresit CT 48 or CT 49 silicone paint applied directly over the cured render restores the original appearance without stripping back — a straightforward renovation that extends the system's service life further. Use the coverage calculator to build your full materials list before placing the order — that single step prevents mid-project shortfalls and batch-mismatch risk on every job.
Is This Product Right for Your Project?
- Yes — for premium, low-maintenance facades on exposed elevations: CT 74 is the right choice when your project needs a self-cleaning finish with V1 breathability and W3 water resistance — ideal for coastal properties, urban facades exposed to pollution, north-facing elevations prone to biological growth, and any project where long-term colour stability and minimal maintenance are priorities.
- Need a silicate-silicone hybrid for machine-only large-scale work? The CT174 machine-applied 1.0 mm render offers pump-optimised rheology with a finer stone texture and silicate-silicone double-binder performance for faster site throughput on commercial developments.
- Looking for a premium alternative with extended open time? The broader silicone render collection includes premium Atlas silicone systems with 4K aggregate technology, BBA certification, and working windows of 30+ minutes — a strong option when the specifier requires Atlas system documentation or the project benefits from a more forgiving application pace.
Frequently Asked Questions
How many tubs of Ceresit CT 74 do I need for my project?
Each 25 kg tub covers approximately 10–12 m² at the 1.5 mm grain size, based on a consumption rate of 2.1–2.5 kg/m². For a typical 60 m² front elevation, budget 5–6 tubs. Adding 5% for site waste and detailing around windows, doors, and reveals ensures enough material to complete the job without interruption, and ordering from the same production batch keeps the colour perfectly consistent across the entire facade.
Is Ceresit CT 74 an environmentally responsible choice?
The 25 kg tub is made from 100% recyclable polypropylene containing up to 62% post-consumer recycled plastic (PCR), actively reducing virgin plastic demand with every order. The render itself is a water-based formulation with low VOC content, producing minimal emissions during application and curing. The thin application rate of 2.1–2.5 kg/m² generates substantially less material waste per square metre than traditional sand-and-cement renders at 15–20 mm thickness, and the through-coloured, self-cleaning finish eliminates the recurring resource consumption of periodic repainting cycles over the building's life.
Can I use CT 74 on older solid-wall properties?
CT 74 achieves V1 vapour permeability with an Sd value of just 0.14 m, meaning moisture vapour passes through it very freely — so older solid-wall properties benefit from effective outward drying rather than moisture building up behind the finish. Pairing CT 74 with CT 16 quartz primer and — on absorbent historic substrates — a preliminary coat of CT 17 deep-penetration primer creates the ideal foundation for long-term performance on traditional construction.
What colours are available and can you match a shade from another manufacturer?
CT 74 is available in the full Ceresit Colours of Nature palette, tinted on a dedicated Ceresit mixing machine at our Southampton warehouse and ready for next-day dispatch. For projects that need a shade outside the standard Ceresit range — a specific RAL code, an NCS reference, or a colour matched from another manufacturer's swatch — our team mixes bespoke colours to order on the same equipment. Our warehouse also mixes the Atlas 480-shade SAH palette on a separate dedicated machine, bringing the combined colour choice across both systems to over 1,000 standard shades plus bespoke matching. Browse the colour sample catalogues to view both palettes on physical rendered swatches, or contact us with your reference code for a bespoke match quote.
Does CT 74 need repainting over time?
CT 74 is a through-coloured render with UV-stable pigments, so the finish maintains its appearance without repainting for the life of the system. The self-cleaning hydrophobic surface rinses away atmospheric deposits during rainfall, keeping the facade looking fresh with no manual intervention. If a refresh is needed after 15+ years, Ceresit CT 48 or CT 49 silicone paint can be applied directly over the cured render to restore the original tone without stripping back or re-rendering — a straightforward renovation that extends the facade's service life further.
Technical Documentation