Atlas Acrylic Render White 25 kg — Impact-Resistant Thin-Coat EWI Finish

Designed for commercial facades, schools, and high-traffic elevations where everyday knocks demand a tougher finish, Atlas Acrylic Render White 25 kg delivers a dense 1.5 mm spotted texture with dispersed microfibre reinforcement across the full render mass — covering up to 10 m² per tub at approximately 2.5 kg/m² over EPS and XPS insulation systems. Part of the premium silicone render collection, this acrylic thin-coat finish is classified to EN 15824:2017 with W3 low water absorption and V2 medium vapour permeability, making it the cost-effective specification for polystyrene-based EWI builds where impact resistance and colour stability matter more than the higher breathability offered by silicone alternatives.

Available in 480 colours through the Atlas SAH Colour Scheme for Renders and Paints, every tub is tinted on a dedicated Atlas mixing machine at our Southampton warehouse and dispatched next day — no remote factory lead time, no waiting for a special batch run. 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. Browse the colour charts and sample catalogues to confirm your shade on a physical rendered swatch before ordering full-size tubs.

Key Benefits

• Impact-Resistant Finish: Dispersed microfibre reinforcement throughout the render mass absorbs surface stress from knocks and impacts, keeping the finish intact on busy commercial facades, school buildings, and ground-floor elevations exposed to foot traffic and everyday wear.
• High Coverage From Every Tub: Each 25 kg tub covers up to 10 m² at the standard 1.5 mm grain, requiring approximately 2.5 kg/m² — giving installers a clear quantity calculation and reducing material waste on site.
• Rainwater Sheds Quickly: W3 water absorption classification per EN 15824 means the cured render sheds driving rain rapidly, protecting the insulation layer beneath from moisture penetration and maintaining long-term thermal performance across UK winters.
• Colour That Lasts: Advanced pigment technology with automated dosing delivers UV-stable, fade-resistant colour across all 480 SAH shades — the through-coloured finish stays true for the lifetime of the system, even on south-facing elevations exposed to prolonged sunlight.
• 480 Colours Plus Bespoke Matching: The full Atlas SAH palette is mixed on a dedicated machine at our warehouse and ready for next-day dispatch, and bespoke colours matched to RAL, NCS, or other manufacturers' references are mixed to order on the same equipment — so every project gets its exact shade without delay.
• Built-In Bio Protection: The acrylic formulation creates an environment that discourages algae, mould, and fungi colonisation, keeping facades visually clean between maintenance cycles even on north-facing or sheltered elevations in the UK's damp climate.
• Crack-Resistant Structure: Microfibre dispersion throughout the full render volume strengthens the finish against thermal expansion and contraction, so seasonal temperature swings across the UK are absorbed without surface cracking or delamination.

Technical Specifications

Property	Value
Pack Size	25 kg
Base Material	Advanced Acrylic Polymer Resin
Density	Approx. 1.7 kg/dm³
Grain Size	1.5 mm (N-15) or 2.0 mm
Texture Type	Spotted (baranek)
Coverage (1.5 mm)	Approx. 2.5 kg/m² (~10 m² per tub)
Coverage (2.0 mm)	Approx. 3.0 kg/m² (~8.3 m² per tub)
Adhesion to Substrate	≥ 0.35 MPa
Water Absorption	W3 (low) per EN 15824
Vapour Permeability	V2 (medium) per EN 15824
Reaction to Fire	A2-s1,d0 per EN 13501-1 (on mineral-wool substrate)
Colour Range	480 SAH shades plus bespoke matching to order
Application Method	Hand trowel; machine (1.5 mm grain)
Application Temperature	+5 °C to +25 °C
Standard Compliance	EN 15824:2017 (verified current as of early 2026)

Application and Compatibility

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. For plinths and splash zones below the damp-proof course, pair the main-wall acrylic finish with a mosaic render at ground level for the heavy-duty impact resistance and washability those conditions require.

• Substrate Preparation: A fully cured quartz primer coat from the render primers range regulates suction across the basecoat surface, ensuring even texture and consistent colour depth from corner to corner.
• Step-by-Step Method: The thin-coat render application guide walks through every stage from basecoat embedding to top-coat texturing in the sequence a professional installer follows on site, covering both hand and machine techniques.
• Application Window: Apply between +5 °C and +25 °C with no rain expected within 24 hours for a complete polymer film formation — the seasonal application timing guide covers weather-management protocols for UK conditions throughout the year.
• 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.
• Companion Products: Pair with a fibre-enhanced adhesive basecoat and Atlas 150 g/m² mesh to complete the certified EWI system from adhesion layer through to decorative finish — all available from a single supplier with next-day UK delivery.

Installation Notes

A smooth, professional finish starts with thorough mechanical stirring at low speed before application — this reactivates the acrylic binders and ensures an 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 gives 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.

Trade Insight — Installer's Note

Experienced renderers consistently find that priming the basecoat a full 24 hours before topcoat application — rather than the minimum drying time — gives the most forgiving working window on site, especially on south-facing elevations where suction rates climb quickly above 20 °C. The acrylic binder in this render 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. For the best colour consistency across large facades, verify that all tubs share the same batch number on delivery and calculate the full tub requirement using the render coverage calculator before ordering — a single calculation step protects the entire material budget from mid-project shortfalls and batch-mismatch risk.

Is This Product Right for Your Project?

• Yes — for durable EWI finishes on EPS and XPS systems: Atlas Acrylic Render is the ideal specification when you need a tough, impact-resistant decorative coat for commercial buildings, schools, or any high-traffic elevation where the facade must withstand everyday knocks while delivering a clean, long-lasting spotted texture across 480 available colours with bespoke matching for anything outside the standard palette.
• Need superior breathability for mineral wool or solid-wall projects? For EWI builds using mineral wool or any substrate requiring high vapour permeability, the silicone render range offers V1 vapour permeability — allowing moisture to escape freely through the wall build-up, which is the preferred route for solid-wall retrofits and heritage properties where breathability is essential.
• Looking for a self-cleaning finish on exposed residential facades? Silicone thin-coat renders from the premium silicone render collection feature hydrophobic self-cleaning technology that actively repels dirt and biological growth with every rainfall — a lower-maintenance option for homeowners who want a pristine facade without regular washing.

Frequently Asked Questions

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.

Is Atlas Acrylic Render environmentally responsible?

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.

Can I use acrylic render on mineral wool insulation?

Acrylic render carries a V2 (medium) vapour permeability rating, which performs well over EPS and XPS boards but does not provide sufficient moisture transfer for mineral wool systems. For stone wool insulation, choosing a silicone or silicate-silicone render with V1 classification ensures moisture escapes freely through the wall build-up, protecting long-term thermal performance and supporting a healthy wall structure for decades.

What colours are available and can you match a shade from another manufacturer?

Atlas Acrylic Render is available in 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 that need 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, or contact us with your reference code for a bespoke match quote.

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, the Atlas system can be paired with appropriate scheduling and site protection to maintain quality throughout the season.

Technical Documentation

• Technical Data Sheet — Atlas Acrylic Render (PDF)
• Declaration of Performance — DoP (PDF)
• Safety Data Sheet — SDS (PDF)