Fosroc Nitoflor SL Conductive / Dissipative
A seamless 2 mm self-smoothing epoxy floor that safely channels static charge to earth — engineered for electronics assembly, clean rooms, magazines and operating theatres where ESD is a real risk.
What is it?
A flow-applied, self-levelling epoxy floor topping from Fosroc, laid at 2 mm, that builds in a continuous conductive network so static electricity drains to earth. It is supplied in two grades — Conductive (lower resistance) and Dissipative (controlled higher resistance).
Where is it used?
Electrostatic-sensitive environments: electronics and PCB assembly, clean rooms and computer rooms, explosives and ordnance magazines, paint and solvent booths, and hospital operating theatres.
Why use it?
It removes the hazard of static build-up — protecting sensitive components from ESD damage and eliminating spark risk in flammable atmospheres — while giving a dense, hygienic, easily cleaned and abrasion-resistant seamless surface.
How is it applied?
Over a primed, sound concrete base a conductive earthing layer (with copper earthing strips) is installed, followed by the self-levelling conductive or dissipative topping trowel- or squeegee-spread and de-aerated with a spiked roller to a 2 mm finish.
About Fosroc Nitoflor SL Conductive / Dissipative
Fosroc Nitoflor SL Conductive / Dissipative is a specialist anti-static (ESD-control) industrial floor topping built around blended epoxy resins, curing agents and graded inert aggregates. Unlike a standard self-levelling epoxy, it is engineered so that the cured floor has a controlled, measurable electrical resistance: static charge generated by foot traffic, trolleys or process equipment is conducted through the floor and bled away to an earthing point rather than allowed to accumulate. It is offered in two distinct grades selected by how aggressively the floor must dissipate charge. The Conductive grade gives the lowest resistance (a fast path to earth) and suits the most demanding environments such as explosives handling and certain electronics lines. The Dissipative grade holds a deliberately higher, controlled resistance so that discharge is gradual and gentle — the right choice where a sudden hard discharge could itself damage sensitive micro-electronics. Laid at 2 mm, the system self-levels to a smooth, light-reflective, jointless surface that is dense, impervious and easy to keep clean. Because it is a complete system rather than a single tin, the floor is built up in layers: a penetrating primer to seal and bond to the concrete, a conductive earthing/undercoat layer linked by copper earthing strips back to the building earth, and finally the pigmented self-levelling conductive or dissipative topping. For Indian specifiers it sits in Fosroc’s wider Nitoflor high-technology flooring range and is a proven, internationally specified ESD solution rather than a generic anti-static paint.
The technical insight
The defining technical feature is the floor’s certified surface and earth-leakage resistance, and getting the right grade is what separates a compliant ESD floor from a liability. The Conductive grade delivers a system resistance in the order of 5×10^4 to 1×10^6 ohms — a very low-resistance path that earths charge almost instantly, which is what explosives magazines, ordnance stores and some flammable-atmosphere zones demand. The Dissipative grade is specified at 1×10^6 to 1×10^9 ohms; here the higher resistance is a feature, not a defect, because it lets charge drain away slowly enough to avoid the abrupt high-current discharge that can destroy semiconductors and ICs. The earthing concept is what makes the numbers real on site: a conductive underlayer is laid in electrical contact with copper earthing tape, and that tape is bonded back to the building’s earth at defined intervals — without this network the most expensive topping in the world is just an ordinary epoxy floor. Mechanically the cured system behaves like a quality epoxy topping, with compressive strength around 60 N/mm2, tensile around 16 N/mm2 and flexural around 40 N/mm2 (BS 6319, 7 days), so it carries the same point loads, pallet trucks and abrasion that a normal industrial epoxy would. Cure is practical for working plants: at 30 degrees C the floor takes light foot traffic at about 24 hours and full service traffic at around 5 days — slower in cold weather, faster in heat. Resistance must always be verified on the finished, cured, cleaned floor with a calibrated megohmmeter against the project’s ESD standard, because surface contamination, humidity and incorrect earthing can all move the reading out of range.
Where it is used
- Electronics and PCB assembly lines, SMT areas and test labs where ESD damages components
- Semiconductor, telecom and electrical equipment manufacturing clean rooms
- Computer rooms, server halls and data-processing areas
- Explosives, ordnance, propellant and detonator manufacturing and storage magazines
- Paint, solvent and coating spray booths and other flammable-atmosphere zones
- Hospital operating theatres and areas using flammable anaesthetic gases
- Pharmaceutical and fine-chemical plants requiring static control plus hygiene
- Defence ordnance factories and ammunition handling stores in India
Key advantages
- Provides a continuous, controlled passage of static electricity to earth, protecting ESD-sensitive products and reducing spark risk in flammable areas
- Two grades — Conductive and Dissipative — let you match the resistance band precisely to your ESD or safety standard
- Seamless, smooth, light-reflective self-levelling finish with no joints to trap dirt
- Dense, impervious surface that is hygienic and easy to clean — suited to clean rooms and theatres
- Good abrasion resistance and good resistance to a wide range of chemicals
- Solid epoxy mechanical strength (approx. 60 N/mm2 compressive) for industrial loading
- Backed by Fosroc’s technical and applicator support network across India
Limitations & considerations
- The ESD performance depends entirely on a correctly installed earthing network (conductive layer plus copper earthing strips bonded to building earth) — skip this and the floor is just ordinary epoxy
- Resistance can drift out of range if the surface is contaminated, waxed, over-cleaned or exposed to high humidity; periodic megohmmeter testing is required
- As an epoxy system it has limited UV stability and may yellow under strong direct sunlight, so it is intended for interior use
- Requires a sound, dry, properly prepared (shot-blasted/ground) concrete substrate with an effective DPM; rising damp will cause failure
- Specialist, multi-layer application — should be installed by trained applicators, not general painters
- Cure and resistance development slow significantly in cold conditions; low ambient temperatures extend traffic times
- Standard colour range is limited compared with decorative non-conductive epoxy floors
Selection & best practice
Treat the earthing system as the heart of the job, not an afterthought. Confirm the substrate is sound, dry (effective DPM in place) and mechanically prepared, then prime. Install the conductive earthing layer in genuine electrical contact with copper earthing strips, and bond those strips back to the building earth at the intervals and number of points specified for the floor area — record where they are. Choose the grade by the governing standard: Conductive (5×10^4–1×10^6 ohms) for explosives/flammable and the most charge-sensitive work, Dissipative (1×10^6–1×10^9 ohms) where a soft, gradual discharge protects micro-electronics. Mix full packs only, by mechanical stirrer, and lay the topping at the full 2 mm, de-aerating with a spiked roller for a flat finish. After full cure, test surface and earth-leakage resistance with a calibrated megohmmeter on a clean floor and document the readings against the project ESD spec before handover. Finally, brief the client: only ESD-compatible, non-insulating cleaning regimes (no wax or polish) keep the floor in range over its life. Always work to the current Fosroc TDS and method statement for your country.
Specifications
| Chemical type / system | Blended epoxy resins, curing agents and graded inert aggregates (solvent-free epoxy ESD system) |
| Grades | Conductive and Dissipative |
| Applied thickness | 2 mm (flow / self-levelling) |
| Surface resistance — Conductive | 5 x 10^4 to 1 x 10^6 ohms |
| Surface resistance — Dissipative | 1 x 10^6 to 1 x 10^9 ohms |
| Compressive strength | approx. 60 N/mm2 (BS 6319, 7 days) |
| Tensile strength | approx. 16 N/mm2 (7 days) |
| Flexural strength | approx. 40 N/mm2 (7 days) |
| Curing — foot traffic | approx. 24 hours at 30 degrees C |
| Curing — full traffic | approx. 5 days at 30 degrees C |
| System build-up | Primer + conductive earthing/undercoat layer (with copper earthing strips) + self-levelling conductive/dissipative topcoat |
| Topcoat pack | approx. 15 litre pack (base, hardener, aggregate, colour) — approx. 7.5 m2 at 2 mm |
| Undercoat (conductive) pack | approx. 2.4 litre pack (base and hardener) |
| Earthing | Copper earthing strips bonded to building earth |
| Application | Interior, on sound dry primed concrete; specialist applicator |
Industry use cases
Electronics & semiconductors
Dissipative grade across PCB assembly, SMT and test floors so accumulated charge bleeds away gently without a hard discharge that would destroy ICs and micro-components.
Defence & explosives
Conductive grade in ordnance factories, propellant plants and ammunition magazines, where the lowest resistance path to earth is mandated to eliminate spark ignition risk.
Healthcare
Operating theatres and areas using flammable anaesthetic gases use the conductive/dissipative system for a seamless, hygienic, static-safe floor that is easy to disinfect.
Pharma & fine chemicals
Clean rooms and solvent-handling areas combine ESD control with the dense, impervious, washable surface needed for contamination control and GMP cleaning.
Industrial paint & coating booths
Spray booths and solvent-rich rooms specify the conductive grade so static cannot build on operators or trolleys and trigger ignition in flammable vapour.
Data centres & control rooms
Computer halls and server rooms use the dissipative floor to protect hardware and prevent nuisance static shocks to staff.
Frequently asked questions
What is the difference between the Conductive and Dissipative grades?
How thick is the Nitoflor SL Conductive / Dissipative floor?
Why are copper earthing strips needed?
What strength and durability does it offer?
How soon can the floor be used after laying?
How is the ESD performance checked after installation?
How we position Fosroc Nitoflor SL Conductive / Dissipative
Nitoflor SL Conductive / Dissipative is the self-levelling, smooth-finish member of Fosroc’s ESD flooring family and is best understood alongside its siblings. Where a heavier-duty, more impact- and thermal-resistant anti-static floor is required, Fosroc Nitoflor EPU Conductive & Dissipative (a polyurethane system) and the newer Nitoflor SL3000 U ESD are the step-up options; for a thinner, coating-grade static-control finish there is Nitoflor SL Conductive Plus. For the conductive underlayer and earthing detailing the same Nitoflor primer/earthing components are used, and a Fosroc method statement ties the build together. Against the wider market, credible alternatives an Indian specifier will weigh include Sika’s Sikafloor ESD/conductive epoxy systems (e.g. Sikafloor 2350 ESD / 235 ESD), MYK Arment / MBS conductive epoxy floors, STP’s anti-static industrial floors, and BASF/MasterTop ESD lines. Dr. Fixit (Pidilite) is strong in waterproofing and general industrial coatings but is less of a direct specialist in certified ESD topping systems, so it is usually a secondary option for this specific duty. The honest positioning: Nitoflor SL Conductive / Dissipative is a proven, internationally specified, mid-build epoxy ESD floor that wins on seamless self-levelling finish, a clear two-grade resistance choice and Fosroc’s applicator support — but it is a specialist, multi-layer, earthing-dependent system, so the right product choice and a competent installer matter far more than the tin price. As an authorised Fosroc distributor and applicator across Delhi NCR and Pan-India, Space Arc Engineering can advise on grade selection, earthing design and supply for your specific standard.
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