ATLAS BEJCA SEALER RENDERS 09 EBONY 4L

Atlas Bejca Sealer 09 Ebony 4 L is the deepest near-black wood tone in our concrete effect render collection — one 4-litre tin covers approximately 26–40 m² per coat at 0.10–0.15 kg/m² consumption, delivering a UV-stable hydrophobic finish that locks the wood-grain pattern stamped into Atlas Cermit WN render at full ebony depth.

Where Atlas Bejca 09 Ebony Performs Best — UK Wood-Effect Feature Facades

Atlas Bejca 09 Ebony is a semi-transparent staining sealer based on polymer dispersions and silicone resins, formulated to colour and protect Atlas Cermit WN textured render and other mineral substrates with the deepest near-black wood tone in the 10-shade Bejca range. In plain terms: it transforms a stamped white Cermit WN panel into a high-contrast dark-timber finish while keeping the surface hydrophobic, UV-resistant, and free from the annual oiling that real timber cladding demands. The coating cures flexible — moving with seasonal wall expansion rather than micro-cracking — and reaches early rain resistance after approximately 24 hours.

Typical UK use sits in three places: contemporary feature panels and entrance bays where a high-contrast dark-timber accent zone defines the architectural character; full elevations on modern new builds and extensions where ebony reads as a sophisticated alternative to charred-timber or dark-stained cladding; and interior accent walls in commercial and residential reception spaces where a dramatic dark-wood statement pairs with neutral plaster surfaces. Specify it where the brief asks for the darkest, most dramatic timber-effect finish at single-coat thickness rather than full cladding depth.

Why Installers Choose Ebony for High-Contrast Feature Panels

• Boldest tone in the Bejca range: Semi-transparent ebony pigments produce a near-black wood finish with visible grain depth showing through on raised ridges and full saturation in recessed mortar-style grooves — the highest-contrast finish among the 10 Bejca shades, and the one most often specified for statement zones.
• UV-stable colour through full service life: Inorganic pigment components hold the dark tone against UV exposure for 5–12 years on standard UK orientations, depending on elevation and exposure, without the visible drift toward grey that plagues organic dark stains on timber cladding.
• Hydrophobic silicone-resin barrier: Rain beads off the cured film rather than soaking in, which keeps atmospheric soiling and biological growth from settling into the stamped grain — particularly valuable on north-facing panels where dark colour already amplifies the visual impact of any algae creep.
• Same-day application progress: Each coat dries in approximately 30 minutes, so a two-coat ebony build-up completes within a single working session and reaches early rain resistance after 24 hours — meaningful scaffold-hire saving on phased feature-panel projects.
• Flexible film accommodates seasonal movement: The polymer-dispersion binder cures flexible, moving with the ±0.5 mm typical seasonal panel expansion without micro-cracking — important on dark facades where any hairline crack catches light dramatically against the deep tone.
• Compatible across the wood-effect render system: Bonds to Atlas Cermit WN textured render, standard mineral renders (smooth or textured), concrete, gypsum render, and plasterboard — usable on both exterior facade feature zones and interior accent walls within a single SKU.
• Specified within Atlas ETICS and Roker EWI systems: Sits within the Atlas certified system pathway when applied as the colour-finish layer over Cermit WN on insulated build-ups, giving specifiers a clear compliance route from insulation through to decorative finish on EWI retrofits.

Technical Specifications — Atlas Bejca 09 Ebony Data Sheet Highlights

Property	Value
Product type	Semi-transparent staining sealer for mineral renders
Colour	09 Ebony — near-black wood tone
Pack size	4 L tin
Density	~1.02 g/cm³
Average consumption	0.10–0.15 kg/m² per coat
Approximate coverage	~26–40 m² per coat per 4 L tin
Drying time between coats	~30 minutes
Early rain resistance	~24 hours after final coat
Binder system	Polymer dispersions + silicone resins
Application temperature	+5 °C to +25 °C
Application methods	Brush, roller, or sponge (manual)
Primary compatible substrate	Atlas Cermit WN textured render
Additional compatible substrates	Concrete, mineral renders, gypsum render, plasterboard
System compatibility	Atlas ETICS and Atlas Roker EWI systems
Range position	Shade 09 of 10-shade Bejca palette (deepest tone)
Shelf life (sealed)	12 months from manufacture when stored +5 °C to +25 °C

How to Apply Bejca 09 Ebony — Coat Discipline, Dosage, and Two-Pass Build-Up

Apply Bejca 09 Ebony only after the Cermit WN render has cured for a minimum of 3 days at +20 °C and 50 % relative humidity; in typical UK conditions where ambient temperature sits between +8 °C and +15 °C, extending the curing window to 5–7 days gives the most reliable bond. Stir the tin gently before use to redistribute the semi-transparent pigments evenly — settling on a stored tin is normal and resolves with a slow brush-mix rather than a high-speed drill that would aerate the binder.

The technique that separates a professional ebony facade from an amateur one is groove-first, flats-second discipline: work the sealer into the stamped grain grooves with a soft-bristle brush before smoothing the flat areas with a medium-nap roller, rather than rolling the surface first and then trying to push product into the recesses. Two thin controlled passes deliver a more uniform ebony finish than one heavy coat — the first pass at 0.10 kg/m² establishes the base depth and exposes any thin areas or roller marks while correction is straightforward; the second pass at 0.12–0.15 kg/m² builds full ebony depth across every groove and flat section.

For the complete wood-effect facade sequence from substrate priming through to final ebony coat, the concrete effect render application guide covers every stage including stamp technique with Atlas Anti-Adhesive for Forms release agent and pattern impression with the Atlas silicone wood stamp. The sealers for concrete effect renders guide covers Bejca shade selection across the 10-tone palette and the situations where ebony's dramatic depth is the right call versus a mid-tone or light alternative.

Installation Notes — Dark Pigment Handling and Solar Load Management

Dark pigment behaves differently from mid-tone and light Bejca shades in two practical respects, and planning for both before opening the tin produces a cleaner result. First, correction visibility: any pooling, brush mark, or skipped recess shows up far more dramatically against ebony than against teak or birch, which is why a deliberately conservative first coat at 0.10 kg/m² is the right discipline — inspect the panel in natural daylight before the second pass, address any thin spots while the film is still receptive, then build the final depth in the second coat with consistent dosage. Working under raking morning or evening light reveals texture defects that flat midday light hides.

Second, solar load: ebony absorbs more solar radiation than lighter Bejca tones, particularly relevant on south- and west-facing elevations. The thin semi-transparent sealer coat sits on a mineral render substrate with substantial thermal mass, so absorbed heat dissipates into the wall build-up rather than concentrating at the coating film — but during application itself, surface temperatures on a sunny summer afternoon can climb above the +25 °C upper limit even when ambient air sits at +20 °C. Apply during cooler hours (before 11:00 or after 15:00 in summer) and the polymer film cures under steadier conditions, producing a more even streak-free finish.

Both ambient and substrate temperature should sit between +5 °C and +25 °C with no rain forecast for at least 24 hours after the final coat. Relative humidity below 80 % during the cure window keeps surface condensation from interfering with film formation. Store the sealed tin between +5 °C and +25 °C away from frost and direct sunlight, away from sources of ignition during long-term storage given the polymer-resin base.

Pro Tips From UK Installers Using Bejca 09 Ebony

• First coat at exactly 0.10 kg/m², second at 0.12–0.15 kg/m²: The two-pass dosage split is the most reliable technique for an even ebony finish — the conservative first pass reveals every thin spot and roller mark while correction is easy, the second pass locks the full depth without surprises.
• Inspect under natural daylight between coats: Shop lighting and overcast midday light hide the texture defects that raking morning or evening sun reveals at handover. Walk the panel under daylight at the time of day the facade will be most often seen before committing to the second coat.
• Keep one extra tin on site for facades over 25 m²: Coverage varies from 26 m² to 40 m² per coat depending on substrate porosity; planning for the lower bound of the range with a spare tin on hand means a porous Cermit WN panel does not force a mid-job re-order that risks a fresh batch mismatch on the final section.
• Order ebony on south-facing elevations only after dark-colour heat advisory check: The thin sealer film transfers solar heat into the mineral render below rather than concentrating at the surface, but very large south-facing panels in full sun warrant a discussion with the client about peak surface temperatures — particularly important on EWI build-ups where dark colours on insulated facades carry additional considerations beyond the sealer itself.
• Brush groove-first, then roll flats: Work product into the stamped grain recesses with a soft-bristle brush first, then smooth the raised areas with a medium-nap roller. Rolling first leaves recesses under-coated on a dark pigment where any miss is visible from across the street.
• Decant working volume into a tray rather than dipping into the 4 L tin: Pour 0.5–1.0 L into a flat tray for brush and roller dipping, keeping the main tin clean of brush-face contamination so the unused portion stays in good condition for the next session or follow-up project.

Is Atlas Bejca 09 Ebony Right for Your Project?

• Yes — for dramatic dark-timber feature facades and accent panels: Bejca 09 Ebony delivers the deepest semi-transparent wood tone in the Atlas range at 26–40 m² per coat from a 4 L tin — the right specification for contemporary architecture briefs where ebony reads as a statement zone against lighter render or brickwork.
• Warmer mid-tone timber character instead? Atlas Bejca 06 Teak delivers a classic hardwood appearance at the same per-tin coverage and identical application method, while Atlas Bejca 03 Walnut sits between teak and ebony for a rich dark-brown character without the high-contrast intensity of the near-black tone.
• Smooth concrete aesthetic without stamping or staining? Where the brief moves away from wood character toward a sleek industrial finish, the wider concrete effect render range includes single-product silicone alternatives that deliver a poured-concrete aesthetic in one coat with no multi-step stencil or sealer workflow — pick the system matched to the visual goal rather than retrofitting ebony to a non-wood specification.
• Complete the wood-effect system at point of order: A 25 m² ebony feature panel typically requires Cermit WN render, an Atlas silicone wood stamp, the Atlas Anti-Adhesive release agent, and the Bejca 09 Ebony sealer working together — ordering the four-product system from one source eliminates the programme stalls that catch first-time wood-effect specifiers when one component arrives late.

FAQ — Bejca 09 Ebony Coverage, Tone Stability, and Application

How many square metres does one 4 L tin cover?

Each 4 L tin covers approximately 26–40 m² per coat at 0.10–0.15 kg/m² consumption, depending on Cermit WN substrate porosity and brush technique. For a standard two-coat ebony build-up on moderately absorbent substrate, plan for roughly 13–20 m² of finished facade per tin. Order one extra tin for projects over 25 m² so the lower end of the coverage range does not force a mid-job re-order that risks a fresh-batch tonal mismatch on the final section.

Does ebony absorb more solar heat on south-facing walls than lighter Bejca shades?

All dark facade finishes absorb more solar radiation than lighter tones — ebony sits at the deepest end of the Bejca spectrum, so the effect is most pronounced. The thin semi-transparent sealer film sits on a mineral render with substantial thermal mass, so absorbed heat dissipates into the wall build-up rather than concentrating at the coating film. For large south-facing elevations, pair ebony with a careful build-up specification, apply during cooler daylight hours, and on EWI retrofits discuss dark-colour selection with the EWI system supplier — for very large dark areas, a lighter Bejca shade or a heat-reflective silicone alternative may give an additional margin.

How does ebony compare to teak, walnut, and the lighter shades in the Bejca range?

The Bejca 10-shade palette progresses from light tones through mid-tones to near-black ebony. Teak and walnut sit in the warm mid-range — teak reads as classic hardwood, walnut as rich dark brown — both visible-grain finishes with less contrast against the white Cermit WN base than ebony delivers. Light shades like birch, alder, and stone pine read as soft natural-timber tones suitable for residential heritage contexts. Ebony is the dramatic-statement choice; the other shades are the everyday-timber choices. All ten use the same binder system, application method, coverage range, and substrate compatibility — only the pigment changes.

How long does the ebony tone hold its depth on an exterior facade?

UV-stable inorganic pigment components combined with the hydrophobic silicone-resin barrier maintain colour fidelity for 5–12 years under typical UK weathering, depending on elevation, exposure, and orientation. Ebony's deep pigment concentration gives strong initial colour density, though fully exposed south- and west-facing panels may lighten more visibly over the first 12–18 months than mid-range tones — the contrast between original and lightened shade is simply more perceptible to the eye on dark colours. Periodic low-pressure water cleaning removes atmospheric deposits without specialist impregnation between recoat cycles.

Can Bejca Ebony be applied on interior feature walls?

The product works on interior substrates including gypsum render, plasterboard, and mineral renders, making it a practical choice for feature walls in reception areas, commercial interiors, and high-end residential statement zones where a near-black wood character creates the design impact. The water-based formula carries low VOC content with minimal odour during application, so the workspace stays comfortable without specialist ventilation. Curing times remain the same as for exterior use — 30 minutes between coats and 24 hours to full early-stage robustness.

Is Bejca Ebony an environmentally responsible specification compared to natural dark-stained timber?

The water-based formulation carries low VOC content and produces minimal fumes during application. Each 4 L tin covers 26–40 m² per coat — far less material per square metre than the thick-film coatings traditional timber cladding requires, with correspondingly lower transport weight and packaging waste. The 5–12 year service interval before recoating compares favourably to the annual oiling cycles that natural-timber cladding demands; cumulative resource consumption over a 25-year facade lifecycle is substantially lower than for real ebony or charred-timber cladding equivalents.

Technical Documentation — Atlas Bejca TDS and Safety Data

• Atlas Bejca Technical Data Sheet (Atlas English edition, PDF — covers full 10-shade range including 09 Ebony)
• Binder system declaration — polymer dispersions and silicone resins; flexible cured film; semi-transparent pigment system
• System compatibility — Atlas ETICS and Atlas Roker EWI systems when applied as decorative finish layer over Cermit WN render

Product information last reviewed by the Renders World technical team, May 2026, against the current Atlas Bejca TDS edition (April 2023 revision).