MC-Bauchemie MC-Compliform 12
A ready-to-use reactive release agent that lets shuttering strip clean, cuts blowholes, and leaves an even fair-faced surface across steel, plywood and timber forms.
What is it?
A ready-to-use, reactive liquid mould release agent built on fatty-acid-ester chemistry, applied as a thin film to the form face before concreting.
Where is it used?
Steel shutters, film-faced plywood, timber, GRP and plastic formwork on cast-in-situ, precast, architectural and tunnel-lining work.
Why use it?
It gives clean, drag-free striking, fewer bug-holes and a uniform fair-faced finish while protecting steel forms from rust between pours.
How is it applied?
Wipe the form face clean, apply one thin, even coat by brush, roller or low-pressure spray at roughly 30-60 ml/m2, then place concrete within 30 minutes to 4 hours.
About MC-Bauchemie MC-Compliform 12
MC-Compliform 12 is a reactive-type mould release agent supplied by Space Arc Engineering as an authorised distributor for MC-Bauchemie. Unlike a plain shuttering oil that simply sits as a greasy barrier, it is formulated to react chemically with the cement matrix at the concrete-formwork interface. That thin reacted film is what lets the shutter lift away cleanly, without tearing the arris or leaving a patchy, dusty skin behind. It arrives ready to use, so there is no site dilution, no guesswork on mix ratios, and far less variability between one gang and the next.
The product is aimed squarely at teams who are judged on surface quality, not just on stripping speed. Precast yards, fair-faced and architectural pours, and repetitive formwork cycles are where it earns its place, because a consistent, sparingly-applied film translates directly into fewer blowholes, less staining and less rectification. It works across the formwork most Indian sites actually run, steel, plywood, timber, GRP and plastic, which keeps a single product on the shelf rather than a different oil for every form type. Used correctly it neither retards the set nor leaves a residue that blocks later coatings, plaster or bonded finishes.
The technical insight
The performance comes from chemistry, not just lubrication. Conventional mould oils rely on a physical oil film to stop concrete gripping the form; that film is easy to over-apply, and the surplus collects in low spots where it traps air and cement paste, which is exactly how bug-holes and dark oil stains form. A reactive agent like MC-Compliform 12 behaves differently: its fatty-acid components react with free alkali (calcium hydroxide) at the fresh concrete surface to build a very thin, water-repellent metallic-soap layer right at the interface. Because the active bond is chemical and self-limiting, a sparing coat does the whole job, so there is little excess to pool. The result is a lower incidence of surface voids, a more even colour, and a clean break at demoulding. The same reacted film shields steel form faces from moisture between cycles, reducing flash rusting that would otherwise print onto the next pour. The practical catch is that the reaction needs contact with fresh concrete within a sensible window, which is why the recoat-to-pour timing matters as much as the coating itself.
Where it is used
- Steel shuttering and column/wall forms on cast-in-situ frame construction
- Film-faced plywood and timber formwork for slabs, beams and cores
- Precast concrete moulds in factory and site casting yards
- Fair-faced and architectural concrete where surface finish is specified
- GRP and plastic formliners and modular panel systems
- Tunnel-lining and underground structure formwork on repetitive cycles
- Water-retaining and infrastructure elements needing stain-free faces
- High-reuse formwork where form-face protection extends panel life
Key advantages
- Reactive chemistry gives clean, drag-free stripping with minimal form pull
- Sparing single-coat use reduces blowholes and bug-holes on the cast face
- More uniform surface colour with less oil staining than plain shuttering oil
- Ready to use, so no site dilution and consistent results between gangs
- One product covers steel, ply, timber, GRP and plastic formwork
- Protects steel form faces from flash rusting between pours
- Does not retard the set or leave a residue that blocks later finishes
- Economical in practice because a thin film covers a large form area
Limitations & considerations
- Reactive action depends on concreting within the stated window after coating; a long delay weakens the effect
- Over-application defeats the purpose and can cause the very staining and voids it prevents
- Needs a genuinely clean, sound form face; it will not mask laitance, rust scale or old release build-up
- Performance and appearance vary with formwork type, texture and porosity, so a trial panel is advisable
- As a solvent/oil-based product it needs sensible storage away from heat and ignition sources and correct PPE
Selection & best practice
Start with a clean, dry or only slightly damp form face, free of old release film, laitance and rust. Apply one thin, uniform coat by brush, roller or low-pressure spray, working it out so there are no pools, runs or dry patches; on absorbent ply or timber, wipe back any surplus rather than adding more. Aim for roughly 30-60 ml/m2 and let coverage tell you when it is enough, the face should look damp and even, not wet and glossy. Place concrete within about 30 minutes to 4 hours so the reactive film meets fresh concrete inside its active window. On any new form type or a specified fair-faced finish, run a trial panel first to lock in the coat weight and timing before committing the main pour. Keep containers sealed when not in use, store away from heat and direct sunlight, and use the material within its shelf life.
Specifications
| Product type | Reactive liquid mould release agent (fatty-acid-ester chemistry) |
| State | Ready to use, single component |
| Application method | Brush, roller or low-pressure spray |
| Application rate | Approx. 30-60 ml/m2 as a thin, uniform film |
| Formwork compatibility | Steel, plywood, timber, GRP and plastic |
| Coat-to-pour window | Place concrete within approx. 30 minutes to 4 hours |
| Effect on concrete | Non-retarding; does not inhibit subsequent finishes |
| Storage | Sealed original container, away from heat and direct sunlight |
| Shelf life | 12 months in unopened, correctly stored containers |
Industry use cases
Precast Concrete Yards
Delivers repeatable clean release across high daily mould cycles, keeping precast faces uniform and cutting rejection for surface voids.
Fair-Faced & Architectural Concrete
A sparing reactive film limits blowholes and oil staining, helping exposed columns, walls and soffits meet specified finish standards.
Cast-in-Situ Building Frames
Works on steel and film-faced ply forms for columns, walls and cores, giving contractors fast, low-damage stripping on tight floor cycles.
Tunnel & Infrastructure Linings
Suited to repetitive steel and modular formwork on tunnel and underground works where consistent release and form protection matter.
Formwork Rental & High-Reuse Systems
Protects steel form faces from flash rusting between pours, extending panel life and preserving finish quality across many reuses.
Frequently asked questions
Is MC-Compliform 12 different from ordinary shuttering oil?
How much do I apply and does it need diluting?
How long can I leave the form coated before concreting?
Which formwork can I use it on?
Will it retard the concrete or affect later finishes?
Does it help protect steel formwork?
How we position MC-Bauchemie MC-Compliform 12
MC-Compliform 12 sits in the reactive end of the release-agent range, above plain mineral shuttering oils, for teams who care about the cast face and not only about stripping speed. Within the MC-Bauchemie family it complements the wider Ortolan release-agent line (Basic, Classic, Extra, Premium and the bio grade) where a project needs a specific finish class or an eco-preferred formulation. For sites already standardised on other brands we distribute, it pairs naturally with the Fosroc formwork range, and with our concrete admixture and curing-compound offerings so the release, placing and curing steps stay compatible on the same pour. Where a specifier prefers a Fosroc-approved chemical release agent, Reebol is the natural equivalent.
Fosroc Reebol — Choose Reebol when the project or client specifies a Fosroc-approved chemical release agent; it is a comparable reactive, alkali-reacting agent for clean striking and fair-faced concrete on steel and timber forms.
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