Sika Sikafloor-220 W Conductive
Two-part water-based epoxy conductive primer that lays the electrical earthing plane beneath Sika static-conductive and dissipative floor coatings.
What is it?
A two-component, water-dispersed epoxy primer engineered for high electrostatic conductivity. It is the black conductive layer that sits within a Sika ESD flooring build, not a stand-alone wearing surface.
Where is it used?
Cleanrooms, electronics and semiconductor plants, EV and automotive lines, pharma production halls, server rooms and any interior where static charge has to be bled safely to earth.
Why use it?
It creates a continuous, low-resistance conductive network so the ESD topcoat above it can hold a consistent resistance in the conductive range (roughly 2.5 x 10^4 to 1.0 x 10^6 ohms) once linked to earthing points.
How is it applied?
Roller-applied over a suitably sealed concrete base primer at around 0.08 to 0.10 kg/m per coat, then overcoated with a Sika conductive or dissipative topcoat within the stated recoat window.
About Sika Sikafloor-220 W Conductive
Sikafloor-220 W Conductive is the electrical heart of a Sika anti-static floor rather than a finish you ever walk on directly. It is a two-part, water-dispersed epoxy that dries to a black conductive film, and its whole job is to form an unbroken current-carrying layer between the floor surface and the copper earthing strips fixed into the build. Once the Sika ESD topcoat is laid over it and the copper tapes are tied back to a grounding point, the assembly can hold a stable resistance in the conductive band, which is what protects sensitive electronics and reduces the ignition risk from static discharge in hazardous areas. Because the binder is water-based and solvent-free, the primer has a mild odour and low VOC output, which matters when you are coating inside occupied cleanrooms, pharma suites or data halls where fumes and shutdown windows are tightly controlled.
The product is deliberately narrow in scope, and that is its strength. It is not sold as a hard-wearing screed and it will not, on its own, deliver a colour or a gloss finish. What it does is guarantee the electrical behaviour of the whole system, which is the single hardest thing to get right in ESD flooring. It goes down over a concrete-sealing base primer, gets combined with the earthing grid, and is then covered by the conductive or dissipative wearing coat that carries the mechanical load. Treat it as a specialist middle layer in a designed system, follow the Sika build-up for your target resistance class, and it removes most of the guesswork from commissioning an anti-static floor that actually passes its resistance-to-earth tests.
The technical insight
Static control is fundamentally about giving charge a controlled path to ground. A bare epoxy floor is essentially an insulator, so any charge that builds up on people, trolleys or components has nowhere to go and can discharge suddenly. Sikafloor-220 W Conductive is loaded with conductive fillers that, once the water phase has left and the epoxy has crosslinked, form a continuous conductive matrix through the film. That matrix links horizontally to the copper earthing tapes embedded in the floor and vertically to the ESD topcoat above, so the finished surface reads a predictable resistance to earth instead of behaving like an insulator. The primed conductive layer itself measures very low resistance (well under 10^4 ohms), and the topcoat above it is what raises the reading up into the target conductive window of roughly 2.5 x 10^4 to 1.0 x 10^6 ohms. Getting that number right is a system outcome, not a single-product one, which is exactly why the conductive primer, the earthing grid and the matched topcoat must all be installed as one designed build.
Where it is used
- Conductive earthing layer beneath Sika static-conductive and dissipative ESD floor coatings
- Semiconductor fabrication and electronics assembly cleanrooms
- Pharmaceutical and life-sciences production halls requiring controlled static
- Automotive and EV battery and electronics manufacturing lines
- Server rooms, data centres and telecom equipment halls
- Explosive-risk and flammable-atmosphere zones where static ignition is a hazard
- Defence, aerospace and precision instrument workshops
- Laboratories and controlled interiors needing verified resistance-to-earth performance
Key advantages
- Forms a continuous, low-resistance conductive plane that links the floor to earthing points
- Water-based, solvent-free chemistry with low odour and low VOC for occupied and clean interiors
- Engineered to deliver the conductive resistance band when paired with matching Sika ESD topcoats
- Straightforward roller application over a sealed concrete base primer
- Compatible with the wider Sika conductive and dissipative topcoat range for a single-source system
- Thin-film consumption keeps material logistics and build height manageable
- Supports consistent, repeatable resistance readings during commissioning and audits
- Backed by Sika system documentation and Space Arc technical and applicator support in India
Limitations & considerations
- Not a wearing surface; it must be overcoated with a Sika ESD topcoat and never left exposed to traffic
- Its conductivity only works as designed when copper earthing tapes are installed and correctly grounded
- Water-based cure is sensitive to low temperature and high humidity, which extend or compromise drying
- Delivers electrical performance, not structural strength, so mechanical loads are carried by the topcoat, not this primer
- Overcoating must happen inside the stated recoat window at each temperature or adhesion and readings can suffer
- Chosen colour and final resistance class depend on the topcoat and base primer, not on this product alone
Selection & best practice
Treat Sikafloor-220 W Conductive as one step in a fully specified Sika ESD build, not a product to improvise with. Start on a mechanically prepared, sound concrete substrate sealed with a compatible Sika base primer, and set out the copper earthing tapes and grounding connections before the conductive primer goes down so the layer bonds into a continuous grid. Mix Part A and Part B thoroughly at low speed (around 300 to 400 rpm for three minutes) to avoid trapping air, and only mix what you can use inside the roughly 25-minute pot life at 20 C. Apply by roller as an even thin film at about 0.08 to 0.10 kg/m per coat, keeping the site between +10 C and +30 C, relative humidity at or below 75%, and the substrate at least 3 C above dew point throughout. Respect the recoat windows before the topcoat goes on: roughly 24 hours to 6 days at 10 C, 12 hours to 3 days at 20 C, and 8 hours to 2 days at 30 C. Commission the floor by measuring resistance to earth only after the full system has cured, and always confirm build-up, target resistance class and consumption against the current Sika Product Data Sheet for the project.
Specifications
| Product type | Two-component, water-dispersed (water-based) epoxy conductive primer |
| Role in system | Conductive earthing layer beneath Sika ESD conductive or dissipative topcoats |
| Colour | Part A black liquid, Part B white liquid; cures to a black conductive film |
| Pack size | 6 kg unit (Part A 4.98 kg + Part B 1.02 kg) |
| Consumption | Approx. 0.08 to 0.10 kg/m per coat by roller, varies with substrate porosity |
| Target system resistance | Conductive range approx. 2.5 x 10^4 to 1.0 x 10^6 ohms with matching topcoat |
| Application temperature | +10 C to +30 C (ambient and substrate) |
| Humidity limit | Relative humidity 75% max; substrate at least 3 C above dew point |
| Overcoat window | Approx. 24 h-6 d at 10 C, 12 h-3 d at 20 C, 8 h-2 d at 30 C before topcoat |
Industry use cases
Electronics & Semiconductor
Builds the earthing plane in fabrication and assembly cleanrooms so sensitive components are protected from static discharge during handling and testing.
Pharmaceutical & Life Sciences
Provides a low-odour, water-based conductive base for production halls where static control and clean-interior compliance both matter.
Automotive & EV Manufacturing
Underpins ESD flooring on battery, electronics and assembly lines where charge build-up around live components is a real process risk.
Data Centres & Server Rooms
Creates a grounded conductive floor beneath the wearing coat to safeguard racks, storage and networking hardware from static events.
Hazardous & Explosive-Risk Areas
Bleeds static safely to earth in flammable-atmosphere zones where an uncontrolled discharge could act as an ignition source.
Frequently asked questions
Is Sikafloor-220 W Conductive a finished floor I can walk on?
How does it actually make the floor anti-static?
What resistance can I expect from the finished system?
What surface do I put it on, and what goes on top?
How much do I need and what is the pack size?
What conditions do I need on site during application?
How we position Sika Sikafloor-220 W Conductive
Position Sikafloor-220 W Conductive as a system component, never a stand-alone floor. It only performs when built into a full Sika ESD stack: a Sika concrete-sealing base primer below it and a matched Sika static-conductive or dissipative topcoat (such as the Sikafloor conductive/dissipative topcoat range) above it, tied to a copper earthing grid. Space Arc can supply the complete Sika ESD build-up rather than the primer in isolation, which is what guarantees the floor passes its resistance-to-earth tests. Where a specifier prefers a single-supplier alternative, we also stock genuine Fosroc conductive and dissipative flooring systems that address the same static-control need.
Fosroc Nitoflor SL Conductive / Dissipative — A specifier standardising on Fosroc can choose this self-levelling epoxy conductive or dissipative system as a complete single-brand ESD floor covering the same static-control resistance range.
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