Fosroc Nitoflor Hardtop AS
A two-component conductive epoxy floor that carries static charge safely to earth, built for electronics, pharma cleanrooms and other ESD-sensitive spaces.
What is it?
A two-component, carbon-loaded epoxy floor system that gives a seamless surface with controlled electrical resistance, so static charge drains to earth instead of building up on the floor.
Where is it used?
ESD-sensitive facilities: electronics and PCBA assembly, semiconductor rooms, pharmaceutical cleanrooms, data-centre server halls, and solvent or explosive handling areas.
Why use it?
Uncontrolled static can destroy sensitive components or ignite flammable vapours. This floor keeps surface resistance inside a defined band and links to building earth, so charge dissipates in a controlled, measurable way.
How is it applied?
Laid as a system over prepared concrete: an epoxy primer, then a conductive base coat with copper earthing strips tied to building earth, finished with a conductive topcoat and verified by resistance testing.
About Fosroc Nitoflor Hardtop AS
Nitoflor Hardtop AS is Fosroc’s answer to a very specific problem on the factory floor: static electricity that has nowhere safe to go. In a normal industrial coating, charge generated by foot traffic, trolleys and moving product simply accumulates on the surface until it discharges without warning. In an electronics line that spark can wipe out a microchip; in a room full of solvent vapour it can start a fire. Hardtop AS is engineered so the floor itself becomes a controlled path to earth, holding its electrical resistance within a tight, testable range rather than leaving it to chance.
The system is built from blended epoxy resins, curing agents and graded fillers, with fine conductive carbon dispersed through the mix so the whole floor behaves as one continuous dissipative surface. It is not a single pot of paint but a layered build – primer, a conductive base coat carrying embedded copper earthing tape, and a hard-wearing conductive topcoat – installed by trained applicators and signed off with a resistance meter. Space Arc Engineering supplies and lays Hardtop AS as an authorised Fosroc distributor and applicator across Delhi NCR and pan-India, so specification, material and workmanship come from a single accountable source.
The technical insight
The floor works because conductivity is designed in, not sprayed on. Fine carbon particles are distributed through the resin so they form a continuous conductive network from the wearing surface down to copper earthing strips embedded in the base coat, which are in turn bonded to the building’s earth. Charge landing anywhere on the floor bleeds through this network to earth in a controlled way, instead of collecting until it jumps as a spark. The target is a defined resistance band – broadly the 10 to the 5 to 10 to the 9 ohm range for anti-static and dissipative duty, and below 10 to the 5 ohms where a fully conductive floor is specified – because both extremes are unsafe: too resistive and charge never drains, too conductive and you risk a hard, fast discharge. That is why the base coat coverage and film build are controlled so precisely; the electrical performance of the finished floor depends on getting that conductive layer right, and every installation is validated by measuring surface resistance-to-earth against the project specification before handover.
Where it is used
- Electronics and PCBA assembly lines where ESD can silently damage components
- Semiconductor fabrication, wafer handling and device testing rooms
- Pharmaceutical and medical-device cleanrooms requiring hygienic, dissipative floors
- Data-centre and server halls where static risks equipment and uptime
- Solvent handling, paint mixing and other flammable-vapour zones needing ignition control
- Explosive and ordnance manufacturing areas classed as hazardous
- Defence, aerospace and telecom equipment assembly and calibration bays
- Battery, EV and precision-instrument production floors
Key advantages
- Controlled, measurable path to earth keeps charge from accumulating on the surface
- Conductivity built into the resin body, so performance does not wear off with the coating
- Seamless, jointless finish that is dense, impervious and easy to keep clean
- Good abrasion resistance for floors under constant trolley and foot traffic
- Chemical resistance to many oils, fats, detergents and dilute alkalis found in industry
- Copper earthing tied to building earth gives an auditable, testable ESD system
- Available in a range of colours to suit zoning and cleanroom requirements
- Installed and resistance-verified by Space Arc’s trained applicators for a single-point warranty
Limitations & considerations
- Electrical performance depends entirely on correct earthing and on hitting the specified base-coat coverage – it is not a DIY coating
- Requires a sound, dry substrate; concrete should be well cured (around 28 days) with moisture typically below 5 percent
- Should not be applied over asphalt, unmodified sand-cement screeds, PVC or vinyl without advice
- Low ambient temperature slows or stops cure; application below about 15 degrees C is not recommended
- As a relatively thin topping it follows the substrate profile, so major surface defects must be repaired first
- Resistance must be checked and recorded on completion, and earthing continuity re-verified periodically over the floor’s life
Selection & best practice
Treat Hardtop AS as an electrical system, not just a floor finish. Start with a damp-proofed, mechanically prepared substrate that is sound, clean and dry, and prime it properly before any conductive layer goes down. Set out the copper earthing strips to a planned grid and bond them to building earth before the base coat is laid, then apply the conductive base coat strictly to the specified coverage – under- or over-application is the single most common cause of a floor that later fails its resistance test. Bridge every expansion or movement joint with an earthing connection so conductivity carries across the whole area. Finish with the topcoat, allow the full cure before heavy traffic, and always measure and record surface resistance-to-earth against the project specification at handover. For genuinely ESD-critical rooms, have the design and target resistance agreed with Fosroc and Space Arc up front.
Specifications
| Product type | Two-component conductive / anti-static epoxy floor system |
| Binder chemistry | Blended epoxy resins, curing agents and graded fillers with conductive carbon |
| System build | Epoxy primer + conductive base coat (with copper earthing) + conductive topcoat |
| Anti-static / dissipative resistance | Approx. 10^5 – 10^9 ohms (surface resistance-to-earth) |
| Conductive grade resistance | Below 10^5 ohms where a fully conductive floor is specified |
| Earthing | Copper earthing strips embedded in the system and bonded to building earth |
| Substrate requirement | Cured concrete (~28 days), moisture below ~5%, damp-proof membrane recommended |
| Minimum application temperature | Not recommended below approx. 15 degrees C |
| Colour | Range available – colour specified at time of order |
Industry use cases
Electronics & Semiconductors
Assembly, PCBA and test areas where a single uncontrolled discharge can scrap high-value boards and devices.
Pharmaceuticals & Healthcare
Cleanrooms and process suites needing a hygienic, seamless floor that also controls static around sensitive equipment.
Data Centres & IT
Server halls and network rooms where static protection safeguards hardware and helps protect uptime.
Hazardous & Flammable Process
Solvent, paint-mixing and explosive-handling zones where charge dissipation reduces the risk of vapour ignition.
Defence, Aerospace & Telecom
Precision assembly and calibration bays for equipment that must be built in an ESD-safe environment.
Frequently asked questions
Is Nitoflor Hardtop AS anti-static or fully conductive?
How does the floor actually take static to earth?
Can it be laid straight onto our existing concrete?
How do we know the finished floor really is ESD-safe?
What is the difference between this and standard Nitoflor Hardtop?
Does Space Arc only supply the material, or install it too?
How we position Fosroc Nitoflor Hardtop AS
Nitoflor Hardtop AS sits in Space Arc’s ESD and conductive flooring range for facilities where static must be actively managed. Within the Fosroc family, its closest factory-documented equivalent is Nitoflor SL Conductive / Dissipative, the self-smoothing conductive epoxy topping many specifiers reference for the same duty; where a heavier-duty PU-modified conductive floor is needed, Fosroc’s Nitoflor EPU Conductive & Dissipative is the alternative. Note that ordinary Nitoflor Hardtop, Hardtop S and Hardtop Standard are dry-shake wear hardeners and are not substitutes for an anti-static floor. For non-ESD industrial areas, pair with a standard Nitoflor epoxy or PU screed; across other brands we carry, comparable conductive systems are available from Sika and MC-Bauchemie. Space Arc can help specify the right grade and earthing design for your room’s ESD classification.
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Authorised distribution, technical advice & professional application across Delhi NCR and Pan-India.