Sika SikaTop Armatec-110 EpoCem
A three-part, solvent-free epoxy-cementitious slurry that protects exposed steel against corrosion and doubles as a high-bond primer between old concrete and fresh repair mortar.
What is it?
A three-component (epoxy resin, hardener and cement-based powder) coating with a built-in corrosion inhibitor, engineered to serve two jobs in one product: shielding cleaned reinforcement steel and bonding new mortar to prepared concrete.
Where is it used?
Concrete repair and rehabilitation of bridges, industrial structures, water-retaining structures, car parks and building facades wherever rebar has been exposed and a patch or overlay follows.
Why use it?
It combines cementitious compatibility with epoxy toughness, so a single applied film both passivates the steel and creates a bonding bridge, cutting one step out of the repair sequence while meeting EN 1504-7.
How is it applied?
The three parts are mixed to a lump-free slurry and brush- or spray-applied in two coats on rebar, or as a single wet-on-wet bond coat on concrete before the repair mortar is placed.
About Sika SikaTop Armatec-110 EpoCem
SikaTop Armatec-110 EpoCem is one of the more quietly useful products in a concrete repair store, because it settles an argument that engineers have on almost every rehabilitation job: do you prime the exposed steel, or do you prepare the substrate for bonding? This material does both. It is a factory pre-batched, three-part system built on Sika’s EpoCem technology, where an epoxy phase is dispersed through a cementitious matrix that also carries a corrosion inhibitor. That hybrid chemistry is the whole point. The cement side stays compatible with the alkaline concrete and the subsequent repair mortar, while the epoxy side delivers the adhesion, toughness and moisture resistance that a plain cement slurry cannot.
On a typical patch repair, the sequence is familiar. Damaged concrete is broken back, the reinforcement is cleaned to bright metal, and then the crew has a decision to make about protection and bonding. With this product the two coats brushed onto the rebar act as the anti-corrosion layer, and the same slurry taken onto the surrounding prepared concrete becomes the bonding bridge for the incoming mortar. It is certified for use under dynamic load conditions, which matters on bridges and other structures that never stop moving, and it holds up well against water and chloride ingress, the two agents most responsible for the corrosion it is trying to stop in the first place. For contractors across Delhi NCR and the wider Indian market, that dual role is what makes it worth stocking.
The technical insight
Corrosion of embedded steel is an electrochemical process. Where chlorides or carbonation break down the passive layer on the bar, anodic and cathodic zones set up and the steel begins to give up iron. SikaTop Armatec-110 EpoCem interrupts this at two levels. First, the dense epoxy-cementitious film physically limits the water and chloride that reach the steel, and Sika’s own testing shows it more than tripled the time to onset of corrosion and cut the corrosion rate by over forty percent. Second, the built-in inhibitor chemically works to keep the anodic areas passive, which is exactly the control-of-anodic-areas principle (EN 1504-9, Principle 11) that the product is certified against. The bonding side works on a different mechanism entirely: applied wet-on-wet, the epoxy phase grips the prepared concrete and the fresh mortar while the cement phase cures monolithically with both, so you get a continuous load path rather than a cold, weak interface. That is why the slant-shear and adhesion figures stay high even after an open time between coating and mortaring.
Where it is used
- Anti-corrosion coating on exposed reinforcement steel after concrete has been broken back in patch repairs
- Bonding bridge between prepared old concrete and fresh cementitious repair mortar
- Reinforcement protection in thin or heavily congested reinforced sections where cover is limited
- Repair and rehabilitation of bridge decks, piers and other dynamically loaded structures
- Rehabilitation of water-retaining structures, tanks and treatment works exposed to moisture
- Spall and patch repair on industrial floors, columns and building facades
- Priming coat ahead of hand-applied or sprayed Sika repair mortars in structural repair systems
- Corrosion protection where good resistance to water and chloride penetration is specified
Key advantages
- Two functions in one product: rebar corrosion protection and mortar bonding primer, saving a separate step
- Certified to EN 1504-7 and suitable for anodic-area control under EN 1504-9 Principle 11
- Approved for application under dynamic load conditions, ideal for bridges and moving structures
- Epoxy-cementitious chemistry stays compatible with concrete and cement repair mortars, unlike pure epoxy primers
- Contains a corrosion inhibitor for active, not just barrier, protection of the steel
- Good resistance to water and chloride ingress, the main drivers of reinforcement corrosion
- Long pot life of around 3 hours at +20C gives crews a realistic working window
- Factory pre-batched three-part kit removes on-site guesswork over mixing proportions
Limitations & considerations
- Water must not be added to the mix; doing so compromises the epoxy-cementitious performance
- It is a protection and bonding coat, not a repair mortar, and cannot fill volume or rebuild profile on its own
- Pot life shortens sharply in Indian summer heat, so batch sizes must be planned around ambient temperature
- Steel must be cleaned to bright metal first; poor surface preparation undermines both corrosion and bond performance
- The repair mortar must be placed within the stated open-time window while the bond coat is still receptive
- As a three-part pre-batched kit, part quantities cannot be split, so small touch-up jobs can be wasteful
Selection & best practice
Prepare first: expose the reinforcement fully, remove all rust and scale to a bright metal finish, and clean and saturate the surrounding concrete to a saturated surface-dry condition. Combine the three pre-weighed parts and mix mechanically to a smooth, lump-free slurry, and never add water. For rebar, brush on two full coats to build the corrosion-protection film, allowing the first to set before the second. When it also serves as the bonding bridge, take a coat onto the prepared concrete and place the repair mortar wet-on-wet within the open time, which contracts in hot weather, so size each batch to what the crew can apply before pot life runs out. Work between roughly +10C and +30C, protect fresh work from direct sun and drying wind, and mix only what can be used inside the working window.
Specifications
| Product type | Three-part epoxy-cementitious coating with corrosion inhibitor |
| Components | Part A (resin), Part B (hardener), Part C (cementitious powder) |
| Standard | EN 1504-7 (reinforcement corrosion protection); suitable for EN 1504-9 Principle 11 |
| Consumption (corrosion protection) | approx. 2 kg/m2 per layer of ~1 mm; minimum 2 layers (~2 mm total) |
| Consumption (bonding primer) | approx. 1.5 to 2.0 kg/m2/mm depending on substrate |
| Pot life | approx. 3 hours at +20C |
| Density | approx. 2.0 kg/l at +23C |
| Tensile adhesion strength | >= 1.5 N/mm2 at 28 days |
| Application temperature | approx. +10C to +30C (ambient and substrate) |
Industry use cases
Bridges & Highways
Deck, pier and soffit repairs where exposed rebar needs corrosion protection and the product’s dynamic-load certification suits structures under constant traffic movement.
Water & Wastewater
Rehabilitation of tanks, channels and treatment structures where resistance to water and chloride penetration protects reinforcement in permanently damp conditions.
Industrial & Infrastructure
Patch and spall repair of columns, beams and floors in plants and warehouses, priming the steel and bonding the incoming repair mortar in one operation.
Commercial Buildings
Facade, balcony and structural concrete repairs where congested or low-cover reinforcement benefits from a thin, high-adhesion protective and bonding coat.
Frequently asked questions
Is SikaTop Armatec-110 EpoCem a repair mortar?
Can I use it just as a rebar primer without the bonding role?
Do I add water to make it easier to apply?
How much do I need per square metre?
How long do I have to place the mortar after applying it as a bond coat?
Does it meet a recognised standard?
How we position Sika SikaTop Armatec-110 EpoCem
Within the Sika concrete-repair family, this product is the primer-and-protection layer that sits beneath the repair mortars, so specifiers usually pair it with Sika MonoTop hand-applied or sprayed mortars to reinstate the section, and finish exposed surfaces with a Sikagard protective coating for long-term durability. Where a job needs a pure liquid-epoxy bonding agent rather than an epoxy-cementitious one, Sika’s Sikadur bonding range is the alternative. Against our other brands, contractors weighing a straightforward zinc-rich rebar primer plus a separate SBR or epoxy bonding agent will often look at the Fosroc system, where Nitozinc Primer handles the steel and Nitobond does the bonding as two products rather than one.
Fosroc Nitozinc Primer — Choose Nitozinc Primer when the specification calls for a dedicated single-purpose zinc-rich sacrificial rebar primer and a separate bonding agent, rather than the dual corrosion-protection-plus-bonding role that the Sika product performs in one coat.
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