Description
Reinforced with dispersed microfibre throughout the full render mass and supplied in the full 480-shade Atlas SAH Colour Scheme, Atlas Acrylic Render White 25 kg is the impact-resistant thin-coat finish formulated for EPS and XPS Atlas ETICS systems — tinted on a dedicated Atlas machine at our Southampton warehouse with next-day UK dispatch, certified to EN 15824:2017 under DoP 137/CPR with A2-s1,d0 fire classification on mineral wool substrates.
Where Atlas Acrylic Render Performs Best — Commercial and EPS-Backed UK Facades
Atlas Acrylic Render is a thin-coat decorative finish built on advanced acrylic polymer resin with dispersed microfibre reinforcement, delivering a dense 1.5 mm or 2.0 mm spotted (baranek) texture across EPS and XPS insulation systems with W3 water absorption, V2 vapour permeability, and A2-s1,d0 reaction to fire on mineral wool substrate certified to EN 15824:2017 (DoP 137/CPR). Part of the premium silicone render range, this acrylic finish covers approximately 10 m² per 25 kg tub at the 1.5 mm grain (2.5 kg/m²) and is the practical specification for commercial buildings, schools, multi-unit housing, and any high-traffic facade where impact resistance and colour stability across a 480-shade palette outweigh the higher breathability of silicone alternatives.
The microfibre reinforcement is what separates this acrylic render from standard polymer thin-coats. Distributed throughout the render volume rather than embedded only at the reinforcement layer, the fibres absorb surface stress from everyday knocks, trolley contact, ladder rests, and ball impacts on schools and ground-floor elevations — keeping the finish intact across decades of busy use. UV-stable pigments are dosed by automated machine across all 480 SAH shades, and the through-coloured aggregate means minor scuffs never expose a different shade underneath, with bespoke RAL, NCS, and competitor-shade matching mixed to order on the same Southampton equipment.
Why Trade Specifiers Choose Atlas Acrylic Render
- Microfibre-Reinforced Impact Resistance: Dispersed microfibre running throughout the render mass absorbs surface stress from knocks and impacts, keeping the finish intact on commercial facades, school buildings, and ground-floor elevations exposed to foot traffic and everyday mechanical wear — the practical specification for high-use facades.
- Two Grain Sizes for Texture Choice: Specifiers select 1.5 mm (N-15) for a finer spotted texture at 2.5 kg/m² coverage or 2.0 mm for a deeper aggregate finish at 3.0 kg/m² — matching the visual scale to the building's elevation height and architectural context.
- 480 SAH Shades Mixed On Site: The full Atlas SAH Colour Scheme is tinted on a dedicated Atlas machine at our Southampton warehouse, with bespoke RAL, NCS, and competitor-shade matching mixed to order on the same equipment — every tub arrives ready to apply with next-day UK dispatch.
- Cost-Effective EPS and XPS Specification: Acrylic chemistry delivers reliable W3 water absorption and microfibre-reinforced impact resistance at a competitive per-tub cost on polystyrene-based EWI builds — the practical commercial specification when the project does not require silicone-level vapour permeability.
- A2 Fire Performance on Mineral Wool: Reaction to fire reaches A2-s1,d0 to EN 13501-1 when applied over mineral wool substrate, a classification level that typically satisfies the documentation requirements for higher-risk facades subject to each project's specific fire strategy assessment.
- Colour That Lasts Through UK Sunlight: UV-stable pigments deliver fade-resistant colour across all 480 SAH shades — through-coloured, the finish stays true for the lifetime of the system, even on south-facing elevations exposed to prolonged direct sunlight.
- Built-In Biological Defence: The acrylic formulation discourages algae, mould, and fungi colonisation, keeping facades visually clean between maintenance cycles on north-facing or sheltered elevations in the UK's damp climate.
Technical Specifications — Atlas Acrylic Render Data Sheet
| Property | Value |
|---|---|
| Pack Size | 25 kg plastic container |
| Binder Type | Advanced acrylic polymer resin with mineral fillers and dispersed microfibre |
| Grain Size | 1.5 mm (N-15) or 2.0 mm — spotted (baranek) texture |
| Density | Approx. 1.7 kg/dm³ |
| Coverage Rate — 1.5 mm | Approx. 2.5 kg/m² — approx. 10 m² per 25 kg tub |
| Coverage Rate — 2.0 mm | Approx. 3.0 kg/m² — approx. 8.3 m² per 25 kg tub |
| Adhesion to Substrate | ≥ 0.35 MPa |
| Water Absorption | W3 (low) — EN 15824 |
| Vapour Permeability | V2 (medium) — EN 15824 |
| Reaction to Fire | A2-s1,d0 on mineral wool substrate — EN 13501-1 |
| Application Temperature | +5 °C to +25 °C (air and substrate); humidity below 80% RH |
| Colour Range | 480 Atlas SAH shades plus bespoke RAL/NCS matching |
| Application Method | Hand trowel; machine spray (1.5 mm grain variant) |
| Mandatory Primer | Atlas quartz primer (24 h cure before render) |
| Standard Compliance | EN 15824:2017 · DoP 137/CPR · TDS verified current as of early 2026 |
How to Apply Atlas Acrylic Render — Substrates, Priming, EWI Build-Up
Atlas Acrylic Render bonds directly to cured cementitious basecoats reinforced with Atlas 150 g/m² fibreglass mesh, forming a continuous protective envelope over EPS and XPS insulation boards. The render performs best on polystyrene-based EWI systems where its high impact resistance and dense acrylic matrix deliver maximum durability — making it the practical specification for ground-floor elevations, commercial facades, schools, and public-access buildings exposed to everyday mechanical wear. Prime the cured basecoat with a quartz primer from the exterior render primers range at least 24 hours before rendering to regulate suction and ensure consistent colour depth from corner to corner.
- Substrate Preparation: A fully cured quartz primer coat regulates suction across the basecoat surface, ensuring even texture and consistent colour depth from corner to corner — for the best result on white and pale shades, tint the primer close to the topcoat colour to eliminate any flash-through on thin spots.
- Application Window: Apply between +5 °C and +25 °C with no rain expected within 24 hours of completion, allowing the acrylic polymer film to form fully — protect from direct strong sun and driving rain during the initial cure period.
- Machine Compatibility: The 1.5 mm grain variant is optimised for spray application with standard rendering machines, increasing site efficiency on large-scale commercial projects where speed and consistency matter most.
- Plinth Pairing: For splash zones and ground-level impact zones below the damp-proof course, pair the main-wall acrylic finish with a mosaic render at plinth height for the heavy-duty impact resistance and washability those conditions require.
For the full step-by-step method covering tools, hand and machine technique, and finishing sequence, the thin-coat render application step-by-step guide walks through every stage from basecoat embedding to topcoat texturing in the sequence a professional installer follows on site.
Installation Notes — Mixing, Floating, Drying
A smooth, professional finish starts with thorough mechanical stirring at low speed before application — this reactivates the acrylic binders and ensures even aggregate distribution for consistent texture across the full elevation. For the cleanest result, work wet-on-wet across entire elevations rather than stopping mid-panel, which eliminates visible join lines and produces a seamless spotted texture from corner to corner.
- Trowel Technique: Apply at a thickness matching your chosen grain size (1.5 mm or 2.0 mm) using a stainless-steel trowel, then texture immediately with a plastic float in circular motions to form the characteristic spotted baranek pattern.
- Wet-Edge Management: On panels wider than 3 metres, having a helper maintain the wet edge is a step worth getting right — it is the most reliable way to achieve a uniform texture across a full gable end without lap lines or visible joins.
- Drying Schedule: Surface dry in 24 hours under standard conditions (+20 °C, 50% RH); full polymer film formation in 48–72 hours. Protect from rain, frost, and direct strong sun during the initial cure window.
- Weather Window: The seasonal application timing guide covers weather-management protocols for UK conditions throughout the calendar year, including humidity, temperature, and forecast-checking discipline.
Pro Tips From UK Installers Using Atlas Acrylic Render
Acrylic chemistry films faster than silicone alternatives, so the application discipline that separates a clean finish from a visibly joined one comes down to timing and crew coordination. These site-tested habits keep elevations uniform across real UK commercial projects:
- Prime 24 Hours Ahead, Not the Minimum: Experienced renderers consistently find that priming the basecoat a full 24 hours before topcoat application gives the most forgiving working window on site, especially on south-facing elevations where suction rates climb quickly above 20 °C.
- Plan Scaffold Lifts to Complete One Vertical Pass: The acrylic binder films rapidly once applied, so planning your scaffold lifts to complete a full vertical pass in one session avoids the lap marks that raking light reveals on joined sections.
- Verify Batch Numbers on Delivery: For the best colour consistency across large facades, confirm every tub on site carries the same batch code before the crew starts — pigment shifts between production runs that would be invisible on a small wall become obvious across a multi-elevation commercial facade.
- Calculate Quantities Up Front: Use the render coverage calculator to build the full materials list before ordering — a single calculation step protects the entire material budget from mid-project shortfalls and batch-mismatch risk, particularly when choosing between the 1.5 mm and 2.0 mm grain.
- Match the Grain Size to the Elevation Scale: The 1.5 mm grain reads as a refined texture on residential elevations and detail areas, while the 2.0 mm grain shows more aggregate definition on tall commercial facades viewed from distance — choose based on the building's visual context and viewing distance.
Is Atlas Acrylic Render Right for Your Project?
- Yes — for durable EWI finishes on EPS and XPS systems: Atlas Acrylic Render is the right specification when your project needs a tough, microfibre-reinforced decorative coat for commercial buildings, schools, multi-unit housing, or any high-traffic elevation where the facade must withstand everyday knocks — delivering 480 SAH shades plus bespoke matching, W3 water resistance, and A2-s1,d0 fire performance on mineral wool substrate.
- Need higher breathability for mineral wool or solid-wall projects? For EWI builds using mineral wool insulation or solid-wall retrofits where high vapour permeability is essential, the silicone vs acrylic render comparison covers the full decision matrix — silicone finishes deliver V1 permeability that allows moisture to escape freely through the wall build-up, which is the preferred route for heritage properties and mineral-wool-backed systems.
- Looking for a self-cleaning finish on exposed residential facades? The Ceresit CT 74 silicone render delivers hydrophobic Double Dry self-cleaning technology with BBA Certificate 14/5142 and V1 breathability — a stronger fit for premium homeowner-facing projects where pristine appearance and minimal maintenance over decades are the priority.
FAQ — Atlas Acrylic Render Coverage, Compatibility, Climate
How much Atlas Acrylic Render do I need per square metre?
Each 25 kg tub covers up to 10 m² at the standard 1.5 mm grain size, requiring approximately 2.5 kg/m². For a typical 80 m² semi-detached facade, budget eight tubs to complete the topcoat layer with a small margin for waste and corners. Choosing the 2.0 mm grain increases consumption to approximately 3.0 kg/m² (around 8.3 m² per tub), so factor the grain-size decision into your quantity calculation before ordering.
Can I use acrylic render on mineral wool insulation?
Acrylic render carries a V2 (medium) vapour permeability rating, which is well-suited to EPS and XPS boards but does not provide the moisture transfer rate that mineral wool systems are designed to operate with. For stone wool insulation, choosing a silicone or silicate-silicone render with V1 (high) classification ensures moisture escapes freely through the wall build-up, protecting long-term thermal performance and supporting a healthy wall structure for decades — the silicone vs acrylic comparison guide linked above covers the full substrate-by-render decision matrix.
Does Atlas Acrylic Render meet fire safety requirements for taller buildings?
Atlas Acrylic Render achieves A2-s1,d0 reaction to fire per EN 13501-1 when applied over mineral wool substrate, a classification level that typically satisfies the documentation requirements for higher-risk facades subject to each project's specific fire strategy assessment. On EPS systems the classification differs, so for high-rise residential and commercial projects where A2 performance is required, the system pairing must specifically include mineral wool insulation — and the project's fire strategy assessment confirms the final acceptable specification.
Is acrylic render suitable for harsh UK winters?
Applying above +5 °C and allowing a full 24-hour cure before any temperature drop gives the acrylic polymer binder the conditions it needs for complete film formation. Once cured, the finish withstands repeated freeze-thaw cycles, driving rain, and UV exposure through British winters without cracking or delamination. For projects that need to continue into colder months, scheduling around the warmest part of the day and using site protection to maintain temperature and humidity within the application window keeps quality consistent through the season.
What colours are available and can you match a shade from another manufacturer?
Atlas Acrylic Render is supplied across the full 480-shade SAH palette, tinted on a dedicated Atlas mixing machine at our Southampton warehouse and ready for next-day dispatch. For projects requiring a shade outside the standard Atlas 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. Beyond the Atlas palette, our warehouse also mixes the Ceresit Colours of Nature range 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.
Is Atlas Acrylic Render an environmentally responsible specification?
The formulation uses natural mineral fillers and keeps volatile organic compound (VOC) levels as low as technically achievable, producing significantly less odour and fewer emissions during application than older solvent-based coatings. The thin application rate of 2.5 kg/m² generates substantially less material waste per square metre than traditional sand-and-cement renders applied at 15–20 mm thickness, and the through-coloured finish eliminates the recurring resource consumption associated with periodic masonry-paint cycles over the building's life.
Technical Documentation — Atlas Acrylic Render TDS, DoP, SDS