ATLAS SILICONE WOOD STAMP 200X20CM

Wood-effect rendering works as a three-part system: a mineral render deep enough to hold an imprint, a mould that presses the grain into it, and a tinted impregnant that colours the result. This product is the mould, and at Renders World it sits in the Atlas wood and concrete effect render range beside the render it was built around.

Where a 2-Metre Plank Mould Fits on a UK Wood-Effect Facade

The Atlas Silicone Wood Stamp 200x20cm presses timber grain into ATLAS CERMIT WN, a factory-made one-coat external rendering mortar to EN 998-1:2016 laid around 4 mm thick, which is what gives the finished plank its depth.

That thickness is the reason the long format earns its place. Cermit WN goes on at about 4 mm with a smooth float, is combed through with a 10 mm toothed float to even the layer, then re-smoothed before the mould touches it — so the wall is carrying real material, and a 2-metre mould face takes a continuous line of grain across it rather than a run of short presses.

Three situations suit the format on UK work:

• Full elevations inside an insulation system: the render is declared for external thermal insulation composite systems using EPS and mineral wool, so a stamped plank finish belongs on the same wall as the insulation rather than on a feature panel only.
• Direct-to-masonry renovation: the technical card also covers concrete and traditional cement or cement-lime renders, which describes most sound solid-wall stock once the substrate is seasoned and levelled.
• Shaded and green-belt sites: the card credits the render's high alkalinity and hydrophobisation with natural resistance to mould fungi and algae, which is aimed squarely at buildings near trees, water and shaded city centres.

Why Specifiers Order the Long-Format Mould

Choosing between the two moulds in this range is a decision about how much wall each press covers and how the joints read afterwards. Four things separate the 2-metre format on a facade-scale job.

• 0.4 m² of mould face per press: 2.00 m × 0.20 m gives a face area of 0.40 m². Impressions butt together, so covered area comes out slightly under that — treat 0.4 m² as the tool's face, not a coverage rate.
• Two metres of grain in one movement: fewer presses across an elevation means fewer press-to-press joints for the eye to find, which is the whole argument for the format on long unbroken walls.
• Part of the manufacturer's stated method: the Cermit WN card names a silicone mould as the way the texture is made, and names the Atlas anti-adhesive agent as the coating applied to it beforehand. The mould is the procedure, not an accessory bolted onto it.
• Suited to wet-on-wet working: the card requires material to be laid wet on wet with breaks planned at corners, building returns and downpipes. Covering a panel in fewer moves keeps the wet edge live while you do it.

Atlas Silicone Wood Stamp Data and What It Presses Into

The mould itself is a simple object; the numbers that decide the finish belong to the render underneath it. Both sets are below, each kept to its own scope.

Parameter	Figure	What it applies to
Mould dimensions	200 cm × 20 cm	This SKU, from its own name
Mould face area	0.40 m² per press	Gross face, before impressions butt
Mould material	Silicone	The imprinting method named on the render card
Render it imprints	ATLAS CERMIT WN, ~4 mm	ATLAS CERMIT WN technical card
Aggregate in that render	Max. 1.0 mm	ATLAS CERMIT WN technical card
Release agent	ATLAS anti-adhesive for moulds	Named on the render card
Working temperature	+5 °C to +30 °C	Substrate and ambient, per the render card
Cleaning	Water with detergent	Mould washing instruction on the render card

How to Apply Cermit WN and Imprint the Grain

Everything the mould does depends on the state of the render when it arrives, so the sequence below follows the manufacturer's own order. The full multi-product method sits in the concrete effect render application guide, which owns the wider process.

1. Prime to suit the substrate: a reinforced ETICS layer built with STOPTER K-50 needs no render primer, while the same layer built with other Atlas adhesives is primed with Cerplast from the exterior render primers range. Concrete carries a minimum 28-day seasoning requirement at under 4% structural moisture.
2. Mix at the stated ratio: 0.21–0.24 litres of water per kg, or 5.25–6.0 litres per 25 kg bag. Mix, stand for five minutes, remix — then use it within one hour and re-stir rather than adding water.
3. Lay and comb at 4 mm: apply evenly with a smooth float, comb through with the 10 mm toothed float held at an angle, then smooth again. Average consumption is 2.5–3.0 kg/m², with the card asking for a trial on the actual substrate to fix the real figure.
4. Wait for surface set: the render must stiffen and dry slightly at the surface first, typically 20–60 minutes depending on conditions. The card asks for this window to be watched closely, and a sample panel is the cheapest way to learn it.
5. Coat the mould, then press: grease the mould face thoroughly with the Atlas anti-adhesive agent before use, press the grain, and clear any render left in the recesses before the next impression.

Technique for both moulds in the range, side by side, is set out in the wood and brick stencil guide.

Site Conditions That Decide Whether the Grain Comes Out Sharp

Cermit WN is a cement-and-lime mortar, so the weather governs the working window rather than merely influencing it. Getting these four conditions right is what makes the imprint repeatable across a whole elevation.

• Temperature band: substrate and air both between +5 °C and +30 °C — the same band the anti-adhesive agent is rated for, which keeps tool and material in step.
• Shelter while working and drying: the card asks for the surface to be protected from direct sun, wind and rainfall during application and throughout drying, so scaffold sheeting is a specification item on this finish.
• Planned breaks: stopping points are set in advance at corners, building returns and behind downpipes, which is where a wet-on-wet joint disappears.
• Cure before colour: the render is hard after 24 hours and ready for an ATLAS BEJCA tinted impregnant after three days, measured at +20 °C and 50% humidity.

Washing and Storing the Mould Between Impressions

Mould life on this tool is a housekeeping question rather than a wear question, and the render card is unusually direct about it — worth reading before the first job rather than after it.

• Clear the recesses as you go: render left sitting in the grain detail is removed before the mould is used again, which keeps each impression as sharp as the first.
• Wash with water and detergent: after every session the mould is washed thoroughly to remove all release-agent residue. Doing this properly is what protects the mould from permanent distortion and keeps a correct texture easy to achieve.
• Budget the release agent generously: Atlas publishes average consumption of about 50 ml per single greasing of a mould — a figure stated for the product in general, not for this 2-metre face, so measure it on a sample panel before pricing a large elevation.

Choose Between the Plank Mould and the Hand Stamp

Renders World stocks two moulds for this finish. They press the same render at the same stage, so the choice is format and pattern rather than system compatibility.

Your project	Best mould	Standout spec
Long unbroken elevations, repeat plots	Atlas Silicone Wood Stamp 200x20cm	0.40 m² face, 2 m of grain per press
Reveals, columns, plinths, small panels	compact Fox tree-ring hand mould	Hand format for tight and detailed areas

Order the Mould With the Rest of the Wood-Effect System

The mould creates the texture; the render and the coatings carry the performance, and the card ties the three together in a fixed order.

• Detail areas alongside it: the 200 cm face will not turn a reveal or a narrow return, so most facades run the hand-held Fox mould as well and change format at a design break.
• Colour and protection: an ATLAS BEJCA tinted impregnant goes on after three days, and the choices are set out in the sealers for concrete effect renders guide.
• A different look on the same base: for painted or blocked concrete effects rather than timber, Atlas base coat paint works over the same family of renders.

Order the mould with the render, the release agent and the impregnant together from the wood and concrete effect render collection, so the whole finish lands on site as one delivery.

FAQ: Coverage, Compatibility, Timing and Mould Care

How many impressions does a 40 m² elevation take?

Working from the mould face: 40 m² ÷ 0.40 m² per press = 100 presses as the arithmetic minimum. Impressions butt against each other rather than tiling perfectly, so allow above that figure. Render quantity is the separate calculation — 2.5–3.0 kg/m² average, which the manufacturer asks you to confirm by trial.

Which render does the mould work with, and can it be used indoors?

ATLAS CERMIT WN is the render the imprinting method is written for, on ETICS build-ups with EPS or mineral wool, on concrete, and on traditional cement and cement-lime renders. For an internal wall the same card points to a different Atlas product rather than Cermit WN, so an indoor plank feature wall is a specification question worth raising with us first.

What is the window between laying the render and pressing the mould?

Typically 20 to 60 minutes, until the material has stiffened and dried slightly at the surface. Warm, breezy conditions shorten it and cool still air lengthens it, which is why the card asks for the time to be controlled closely. Mixed mortar itself stays workable for one hour.

What is the correct way to clean the mould?

Water with a detergent added, immediately after each session, until no release-agent residue remains — and any render sitting in the grain recesses comes out before the mould is used again. Kept to that routine, the silicone holds its shape and its detail.

Does the finished stamped facade carry a fire classification?

ATLAS CERMIT WN is declared class A1 for reaction to fire under EN 998-1:2016 in Declaration of Performance 108/1/CPR, and that declaration covers the rendering mortar itself. A tinted impregnant applied over it is a separate organic coating outside that scope, so classification of a complete stamped and coloured wall is a build-up question — send us the specification and we will point you to the right evidence.

Technical Documentation

• ATLAS CERMIT WN technical card and Declaration of Performance 108/1/CPR — the imprinting procedure, mixing, consumption and classifications quoted above.
• ATLAS CERMIT WN manufacturer product page (English) — scope of use for the render this mould imprints.