Description
Wood-effect render is made by pressing a mould into wet mineral render, and the release agent is what lets the mould come away again. This one is the Atlas product named in the render's own method, and at Renders World it sits in the Atlas wood and concrete effect render range beside the render and the moulds it serves.
Where the Release Agent Sits in the Wood-Effect Sequence
The Atlas anti-adhesive release agent 5L is brushed onto the patterned face of a silicone or polyurethane mould at roughly 50 ml per coating, so mineral render lifts away from the pattern cleanly.
Its place in the sequence is fixed by the render. ATLAS CERMIT WN is laid at about 4 mm, left 20 to 60 minutes until the surface stiffens, and then imprinted with a silicone mould — and that render's technical card instructs that the mould be greased thoroughly with the Atlas anti-adhesive agent before use. The agent is a named step in the method, not an optional aid.
Three things follow from that for a UK job:
- It is a consumable, not a tool: the mould is bought once and the agent is bought by the container, so it belongs on the order alongside the render rather than with the tooling.
- It works on the mould, never the wall: the card directs it onto the patterned side of the form, which keeps it clear of the render surface that later takes colour.
- It is declared compatible with ATLAS BEJCA: the tinted impregnant that colours the cured grain, applied three days after rendering, so the release step does not compromise the colour step.
Why Applicators Keep a Container on the Van
Four properties from the manufacturer's card explain why this particular agent is specified rather than a general-purpose release oil.
- No sulphur and no aromatic compounds: the card ties this directly to the product leaving no stains on the textured substrate, which matters because the finish is decorative and will be seen at close range.
- It does not degrade or deform the mould: stated as a property of the agent against silicone forms, so repeated cycles do not cost you the pattern tool.
- Biodegradable, and ready to use: supplied as a clear red liquid that must not be diluted or combined with other materials — a shake of the container to even the consistency is the whole preparation.
- Declared for polyurethane as well as silicone: useful where the pattern tooling on a job is not the Atlas silicone mould.
Technical Data for the Agent and the Render It Serves
The agent's own figures are few, and the ones that govern a working day mostly belong to the render underneath. Both sets are below with their scopes kept separate.
| Parameter | Figure | What it applies to |
|---|---|---|
| Pack size | 5 litre plastic container | The release agent |
| Appearance | Clear red liquid | The release agent |
| Density | 0.91–0.92 g/cm³ | The release agent |
| Average consumption | approx. 50 ml per single greasing of a mould | The release agent, any mould size |
| Working temperature | +5 °C to +30 °C | Substrate and ambient, per both cards |
| Storage temperature | +5 °C to +30 °C, protect from frost | The release agent |
| Shelf life | 12 months from the date on the pack | The release agent, stored as above |
| Shipping weight | 5 kg | This listing |
| Render it serves | ATLAS CERMIT WN at approx. 4 mm | Cermit WN technical card |
| Imprinting window | 20–60 minutes after laying | Cermit WN, weather dependent |
How to Apply It: Dosage, Direction and Re-Coating
The method below is the manufacturer's, and one detail in it is routinely got wrong on site — the direction of the brush stroke.
- Shake, do not dilute: the agent arrives ready to use. Shaking evens the consistency; adding anything to it is expressly ruled out.
- Coat the patterned side: apply with a brush or a roller, working along the mould's long axis rather than across it, and spread it into as uniform a layer as you can manage.
- Use about 50 ml per greasing: the figure is an average for one full coating of a mould and is not scaled to any particular mould size, so a large plank format will take more than a hand tool.
- Recoat on the manufacturer's cycle: the agent's card allows two impressions per coating, after which the mould is cleared of render residue with a brush and a thin fresh layer applied. The render's card is tighter, asking for the mould to be greased thoroughly before use with residues cleared as you go — where the two differ, work to the render card and recoat before each press.
- Keep the film even: the liquid is a clear red, so a patch of mould face that has been missed is easy to see before you commit the press.
The full sequence from substrate to sealer is set out in the concrete effect render application guide, and mould and stencil selection is covered in the wood and brick stencil guide.
What One Container Costs and How Far It Goes
Yield on this product is calculated per greasing rather than per square metre, because the agent has no idea how big your mould is.
- Greasings per container: 5,000 ml ÷ 50 ml per greasing = 100 greasings from one 5-litre container.
- Price: £40.70 per 5-litre container, as listed in August 2026, and shown as available to order at the time of this fetch.
- Cost per greasing: £40.70 ÷ 100 greasings = £0.41 each, before any allowance for what stays in the brush and the tray.
- Impressions per container: on the agent card's two-impressions-per-coating cycle, 100 greasings × 2 = up to 200 presses; recoating before every press instead, as the render card implies, gives 100. Price the job on 100 and treat anything beyond it as headroom.
Converting that to square metres needs your mould's face area, which the Atlas silicone plank mould and the compact Fox hand mould answer differently — take the face area of the mould you are actually using and divide it into the impression count above. The Atlas anti-adhesive release agent 5L is stocked at Renders World as a standing consumable for exactly this reason: the container outlasts most single elevations.
Washing the Mould and Storing the Container
Both Atlas cards carry the same warning in the same words, which is a fair indication of how often it gets skipped.
- Wash the mould after every session with water and added detergent, until no trace of the agent remains. Both documents state that incomplete washing risks permanent deformation of the mould and difficulty achieving a correct texture afterwards.
- Clear the recesses during the work, using a brush, so each impression starts from a clean pattern.
- Store between +5 °C and +30 °C in a cool, dry, well-ventilated place, in the original sealed and labelled container, away from direct sun and heat sources, and protected from frost. Kept that way it holds for 12 months from the production date on the pack.
Specify It With the Rest of the Wood-Effect System
The agent is one of four things a stamped facade needs, and it is the cheapest of them by a distance.
- The render and the mould come first in the sequence; the agent goes on the mould immediately before the press, and the pairing is set by the Cermit WN method rather than by preference.
- Colour follows three days later with an ATLAS BEJCA tinted impregnant, and the options are compared in the sealers for concrete effect renders guide.
- Substrate preparation may need a primer before any of it — a reinforced ETICS layer built with STOPTER K-50 needs none, while other Atlas adhesive layers take Cerplast from the exterior render primers range.
- A concrete look instead of timber uses no release agent at all; Atlas base coat paint is the route over the same family of renders.
Order the agent with the render, the mould and the impregnant from the wood and concrete effect render collection so the sequence is not held up by its smallest component.
FAQ: Yield, Compatibility, Recoating and Care
How many mould coatings does a 5-litre container give?
One hundred, from 5,000 ml at the stated average of 50 ml per greasing. That average is not tied to a mould size, so a 2-metre plank format will draw more than 50 ml and a hand-sized stamp less — run your first container against a tally of presses and you will have a figure calibrated to your own tooling.
Which moulds and which renders is it declared for?
Silicone and polyurethane moulds, and mineral renders — the card gives the wood-texture technology using ATLAS CERMIT WN as its example application. It is also stated as compatible with ATLAS BEJCA, so the cured surface still takes the tinted impregnant. Other mould materials are outside what the card covers, so ask the tooling supplier for their own recommendation.
Do I need to recoat the mould before every impression?
The agent's card permits two impressions per coating, then a brush-out of render residue and a thin fresh layer. The Cermit WN card asks for the mould to be greased thoroughly before use. The two are not identical, and the safer working rule is the render card's — coat before each press, and treat the two-impression allowance as the manufacturer's minimum rather than a target.
How should the container be stored between projects?
Sealed, in its original labelled container, somewhere cool, dry and ventilated between +5 °C and +30 °C, out of direct sun and away from heat sources, and protected from frost. Under those conditions the product is good for 12 months from the production date printed on the pack, which comfortably spans a normal run of projects.
What handling precautions does Atlas state?
The technical card keeps it short: keep away from children, and follow the safety data sheet. That safety data sheet did not respond when we tried to retrieve it for this page, so for full hazard and disposal information, ask us and we will source the current version from Atlas rather than paraphrase one we have not read.
Technical Documentation
- ATLAS Środek Antyadhezyjny do Form technical card (Atlas, distributor mirror) — the source for consumption, density, application direction, the two-impression recoat cycle, storage and shelf life above.
- ATLAS CERMIT WN technical card and Declaration of Performance 108/1/CPR — the render method that specifies greasing the mould with this agent.