Fosroc Cebex EN
Plasticising and hydrogen-free expansion grout admixture supplied as a powder for cement grouts requiring a reduced water/cement ratio and positive, gas-free expansion.
What is it?
A plasticising and hydrogen-free expansion grout admixture from Fosroc, supplied as a powder admixture for cement grouts. It is added where a reduced water/cement ratio and positive, gas-free expansion are required, and meets the EN447:2007 requirements of grouts for prestressing tendons.
Where is it used?
Used in cement grouts for bed grouting, duct grouting, non-shrink infilling and jointing across infrastructure, bridge, precast and general construction projects in Delhi NCR and Pan-India.
Why use it?
It allows a lower water/cement ratio for low permeability and durability, develops high early strength without the use of chlorides, and contains no metallic iron, so there is no rust staining from the expansion system.
How is it applied?
The powder admixture is dosed into the cement grout mix per Fosroc’s technical data sheet to produce a fluid, plasticised grout with controlled positive expansion that compensates for plastic shrinkage and settlement.
About Fosroc Cebex EN
Fosroc Cebex EN is a plasticising and hydrogen-free expansion grout admixture, supplied as a powder admixture for use in cement grouts. It is added to cement grouts wherever a reduced water/cement ratio combined with positive, gas-free (hydrogen-free) expansion is required. By plasticising the mix, Cebex EN delivers high grout fluidity at a low water/cement ratio, which makes placement and injection easier while keeping permeability low for long-term durability. Its hydrogen-free expansion system compensates for the plastic shrinkage and settlement that otherwise leave voids in a cementitious grout, helping the hardened grout fully fill the intended space. Cebex EN meets the EN447:2007 requirements of grouts for prestressing tendons, making it suitable for demanding, specification-driven grouting work. The product develops high early strength without the use of chlorides and contains no metallic iron, so there is no risk of rust staining or corrosion-related deterioration from the expansion mechanism. For Indian construction teams, this combination of fluidity, controlled expansion, durability and a recognised European grout standard makes Cebex EN a dependable choice for bed grouting, duct grouting, non-shrink infilling and jointing. Space Arc Engineering, an authorised Fosroc distributor and applicator, supplies Cebex EN with technical support across Delhi NCR and Pan-India, alongside the wider Fosroc Cebex grout-admixture range and comparable systems such as those offered by Sika and MC-Bauchemie.
The technical insight
Cebex EN works as a dual-function admixture: a plasticiser and a controlled-expansion agent. As a plasticiser, it lets the grout achieve high fluidity at a reduced water/cement ratio, which is the key to producing a dense, low-permeability hardened grout with good long-term durability. As an expansion agent, it uses a hydrogen-free (gas-free) system that generates positive expansion to offset the plastic shrinkage and settlement that naturally occur as a cementitious grout sets, helping eliminate voids beneath base plates, within ducts and in infill pours. Critically, the expansion system contains no metallic iron, so unlike older iron-based expansion methods there is no oxidation, no rust staining and no corrosion-driven deterioration over time. High early strength is developed without the use of chlorides, avoiding chloride-induced risks in reinforced and prestressed environments. Compliance with EN447:2007, the standard governing grouts for prestressing tendons, confirms its suitability for performance-sensitive grouting. As always, the manufacturer’s current technical data sheet governs dosage, mix design and water/cement ratio for each application.
Where it is used
- Bed grouting beneath base plates, machine bases and bearings where a reduced water/cement ratio and positive expansion are required
- Duct grouting in cement grouts, with compliance to EN447:2007 for grouts for prestressing tendons
- Non-shrink infilling of pockets, voids and confined cementitious pours
- Jointing applications using cement grouts requiring plasticising and gas-free expansion
- Producing high-fluidity cement grouts at low water/cement ratio for easier placement and injection
- Durability-led grouting where low permeability and chloride-free early strength gain are needed
Key advantages
- Plasticising action gives high grout fluidity at a reduced water/cement ratio for easier placement and injection
- Hydrogen-free expansion system compensates for plastic shrinkage and settlement in the grout
- No metallic iron content, so there is no rust staining or corrosion-related deterioration from the expansion system
- Develops high early strength without the use of chlorides
- Reduced water/cement ratio promotes low permeability and long-term durability in service
- Meets EN447:2007 requirements of grouts for prestressing tendons
- Supplied as a convenient powder admixture for dosing into cement grouts
- Backed by Space Arc Engineering technical support as an authorised Fosroc distributor and applicator
Limitations & considerations
- It is an admixture, not a ready-mixed grout; performance depends on a correctly designed cement grout mix
- Dosage, water/cement ratio and mixing must follow Fosroc’s current technical data sheet for the intended application
- Performance figures, dosage rates and coverage should be confirmed against the official Fosroc TDS rather than assumed
- As a cementitious-grout admixture, results depend on good site practice in mixing, placing and curing
- Suitability for a specific structure or specification should be verified with Fosroc or Space Arc technical staff
Selection & best practice
Always design the cement grout and dose Cebex EN strictly in line with Fosroc’s current technical data sheet, using the recommended reduced water/cement ratio to balance fluidity with low permeability. Confirm that EN447:2007 compliance is required and acceptable for your specification before use in prestressing duct grouting. Ensure thorough, consistent mixing so the powder admixture is fully dispersed, and maintain good placing and curing practice to realise the intended positive expansion, high early strength and durability. For project-specific guidance, mix designs or substitution against other brands, consult Space Arc Engineering as your authorised Fosroc distributor and applicator.
Specifications
| Product type / chemistry | Plasticising and hydrogen-free expansion grout admixture, supplied as a powder admixture |
| Standard | Meets EN447:2007 requirements of grouts for prestressing tendons |
| Chloride / iron content | Develops high early strength without the use of chlorides; no metallic iron content (no rust staining) |
| Primary uses | Cement grouts requiring reduced w/c ratio and positive expansion: bed grouting, duct grouting, non-shrink infilling and jointing |
| Expansion system | Hydrogen-free expansion system compensating for plastic shrinkage and settlement |
Industry use cases
Bridges & Infrastructure
Cement grouts for duct grouting and bed grouting where EN447:2007 compliance and positive, hydrogen-free expansion are specified.
Precast & Prefabrication
Non-shrink infilling and jointing of pockets and connections using plasticised cement grouts at a reduced water/cement ratio.
Industrial & Plant
Bed grouting beneath machine bases and base plates needing high early strength without chlorides and no rust staining.
General Building Construction
Durability-led cement grouting where low permeability, easy placement and controlled expansion are required.
Frequently asked questions
What exactly is Fosroc Cebex EN?
Is Cebex EN only for post-tensioning duct grouting?
What standard does Cebex EN meet?
Does Cebex EN contain chlorides or metallic iron?
Why is it called a hydrogen-free expansion admixture?
Can Space Arc supply Cebex EN across India?
How we position Fosroc Cebex EN
Positioned as a specification-grade, plasticising and hydrogen-free expansion grout admixture (powder) for cement grouts, distinguished by EN447:2007 compliance, chloride-free early strength and a rust-free, iron-free expansion system, supplied by Space Arc Engineering as an authorised Fosroc distributor and applicator alongside comparable Sika and MC-Bauchemie grout-admixture systems.
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Authorised distribution, technical advice & professional application across Delhi NCR and Pan-India.