Sika Sikafloor-269 ECF CR
A carbon-fibre conductive, ultra-low-VOC/AMC self-smoothing epoxy engineered for cleanrooms and static-controlled production floors.
What is it?
A two-part, total-solid, electrostatic-conductive self-smoothing epoxy resin from Sika, carrying conductivity through embedded carbon fibres. It is the wearing course of the Sikafloor Multidur ES-28 ECF/EQ cleanroom system.
Where is it used?
Cleanrooms and controlled-emission areas — optical and lens manufacturing, medical device and pharma production, semiconductor and electronics assembly, space/aerospace, plus hard-wearing industrial and warehouse floors.
Why use it?
It safely drains static to earth (Rg below 10^9 ohm), releases almost no VOC/AMC or particles, and gives a liquid-tight gloss surface that decontaminates easily — the three things a cleanroom or ESD auditor checks first.
How is it applied?
Poured at roughly 1.5 mm, spread with a serrated trowel over a primed, earthed concrete substrate, then spike-rolled within 10 minutes to release air and level the film.
About Sika Sikafloor-269 ECF CR
Sikafloor-269 ECF CR sits at the demanding end of Sika’s flooring range: a resin built not just to take traffic, but to satisfy the emission and static-control limits that govern cleanroom and electronics-grade production. It is a two-part, solvent-free epoxy in which carbon fibres form a continuous conductive network through the film. That network is what lets accumulated static charge bleed safely to earth instead of arcing across a sensitive wafer, an explosive atmosphere, or an operating theatre. Because it is a total-solid formulation, there is effectively no solvent to flash off, and the product is certified under ISO 14644-1 (class 4 particle) and ISO 14644-8 (class -9.6 outgassing) — the numbers a validation engineer needs on file before a room can be signed off.
For Indian specifiers, the appeal is that one wearing course answers several briefs at once. In an optical, pharma, or semiconductor facility it delivers the ultra-low VOC/AMC and particle behaviour that regulated cleanrooms mandate; in an electronics or ordnance plant it delivers ATEX-137-compliant conductivity; and in a general warehouse or automotive bay it simply behaves as a hard, liquid-proof, easy-to-clean gloss floor. It is free of organo-phosphates and phthalates, conforms to LEED EQ Credit 4.2 for low-emitting coatings, and carries CE marking under both EN 13813 (screed) and EN 1504-2 (concrete protection). The trade-off worth flagging up front is that exact colour matching is not possible — the carbon fibres tint the finish — so it is chosen for performance zones rather than showpiece aesthetics.
The technical insight
The mechanism that matters here is the conductive path to earth, and it only works as a system. The carbon fibres dispersed through Sikafloor-269 ECF CR create a three-dimensional conductive lattice within the ~1.5 mm film, giving a resistance to ground (Rg) below 10^9 ohm and typically under 10^6 ohm when measured per IEC 61340-4-1 and DIN EN 1081. But that lattice has to terminate somewhere: the floor is laid over a conductive primer and copper earthing tapes bonded back to the building’s ground, so the whole build-up behaves as one continuous drain for static. Skip the earthing grid and you are left with an ordinary — if very clean — epoxy floor, not a compliant ESD surface. Equally, the readings drift with ambient temperature and humidity, which is why acceptance testing should be done under the room’s actual operating conditions rather than a hot, dry install day. The total-solid chemistry is the second half of the story: with ~100% solids by weight and volume there is almost no solvent to outgas, which is precisely why the product clears the ISO 14644-8 outgassing class and the sub-100 g/l VOC threshold that cleanrooms demand.
Where it is used
- Cleanroom floors for optical and lens manufacturing where AMC/VOC and particle limits are enforced
- Pharmaceutical and GMP production areas requiring easy decontamination and a liquid-tight surface
- Semiconductor, PCB and electronics assembly zones needing reliable static dissipation to earth
- Explosion-risk and ATEX-classified areas such as ordnance, solvent handling and flammable-atmosphere rooms
- Medical device manufacturing and hospital environments where charge control and hygiene both matter
- Space and aerospace assembly clean areas with strict outgassing requirements
- Hard-wearing course for automotive production and quality bays
- Storage facilities and warehouses needing a durable, dust-free, chemical-resistant floor
Key advantages
- Genuine ESD control — resistance to ground below 10^9 ohm, typically under 10^6 ohm (IEC 61340-4-1)
- ATEX-137 compliant, making it usable in classified explosion-risk zones
- Ultra-low VOC/AMC and low particle emission, certified to ISO 14644-1 class 4 and ISO 14644-8 class -9.6
- Total-solid (100% solids) epoxy — no solvent flash-off, LEED EQ 4.2 conforming
- Free of organo-phosphates and phthalates, and biologically resistant per ISO 846
- Liquid-proof gloss finish that is easy to clean and decontaminate
- Strong mechanical performance: ~100 N/mm2 compressive, ~44 N/mm2 flexural, Shore D ~84
- CE marked under EN 13813 and EN 1504-2, with 24-month shelf life
Limitations & considerations
- Exact colour matching is not possible — carbon fibres tint the film, and bright shades (yellow, orange) show it most; some UV discolouration can occur without affecting performance
- Only functions as an ESD floor when laid over a conductive primer and a properly bonded copper earthing grid to building ground
- Resistance-to-ground readings vary with temperature and humidity, so acceptance testing must reflect real operating conditions
- Short pot life — about 30 minutes at +20°C and only ~15 minutes at +30°C — demands disciplined, fast placement
- Restricted application window: +15°C to +30°C, humidity 80% RH max, substrate at least 3°C above dew point and under 4% moisture
- For experienced professional applicators only; substrate must be sound, primed and prepared to a minimum 25 N/mm2 compressive and 1.5 N/mm2 pull-off strength
Selection & best practice
Treat the earthing grid as part of the floor, not an afterthought — set out copper tapes and bond them to building ground before the conductive primer goes down, and record continuity. Mechanically prepare the concrete (blast or scarify) to remove laitance and open the surface, confirm it is under 4% moisture and above 25 N/mm2, then prime. Blend Part A and B at 83:17 by weight for a full 2 minutes, add Sikadur 501 IN filler and mix a further 2 minutes, decant and remix to avoid unmixed material, but do not over-mix and entrain air. Pour and spread with a serrated trowel to about 1.5 mm at up to 2.0 kg/m2, then spike-roll in two directions at 90 degrees within 10 minutes to level and de-air. Work to the pot life for your site temperature — plan smaller batches in summer. Keep ambient and substrate between +15°C and +30°C, humidity at or below 80% RH, and verify resistance-to-ground under operating conditions before handover.
Specifications
| Chemical base | Two-part total-solid epoxy with conductive carbon fibres |
| Packaging | 30 kg ready-to-mix unit (Part A 24.9 kg + Part B 5.1 kg) |
| Mixing ratio | Part A : Part B = 83 : 17 by weight |
| Consumption / thickness | Up to 2.0 kg/m2 at ~1.5 mm film (self-smoothing wearing course) |
| Resistance to ground (Rg) | < 10^9 ohm; typically < 10^6 ohm (IEC 61340-4-1 / DIN EN 1081); ATEX-137 compliant |
| Compressive / flexural strength | ~100 N/mm2 / ~44 N/mm2 at 28 days (EN 13892-2) |
| Shore D hardness | ~84 (14 days / +23°C, DIN 53505) |
| Cleanroom certification | ISO 14644-1 class 4 (particle); ISO 14644-8 class -9.6 (outgassing); VOC < 100 g/l, LEED EQ 4.2 |
| Pot life / application temperature | ~30 min at +20°C; apply between +15°C and +30°C, max 80% RH, min 3°C above dew point |
Industry use cases
Semiconductor & Electronics
Static-controlled assembly and test floors where a reliable drain to earth protects wafers and boards from ESD damage, with particle counts kept to cleanroom limits.
Pharmaceutical & Medical Devices
GMP production and device-manufacturing suites needing an ultra-low-emission, liquid-tight surface that decontaminates easily and controls static in one system.
Optical & Precision Manufacturing
Lens and precision-optics cleanrooms where AMC/VOC outgassing must stay minimal to avoid contaminating sensitive coated components.
Ordnance & Flammable-Atmosphere Plants
ATEX-classified rooms handling explosives or solvents, where conductive dissipation to earth removes the spark risk from static build-up.
Aerospace & Warehousing
Space/aerospace clean-assembly bays with strict outgassing needs, and general hard-wearing warehouse or automotive floors that benefit from a durable, dust-free finish.
Frequently asked questions
Is Sikafloor-269 ECF CR conductive or dissipative?
How much material do I need per square metre?
Does the floor work without a separate earthing system?
Can I get it in a specific colour to match our branding?
What condition does the concrete need to be in before application?
Which cleanroom and emission standards does it meet?
How we position Sika Sikafloor-269 ECF CR
Sikafloor-269 ECF CR is the specification-grade choice when a floor must satisfy cleanroom emission limits and static control together — optical, pharma, semiconductor and aerospace work. Within the Sika family it is the wearing course of the Sikafloor Multidur ES-28 ECF/EQ system, laid over a Sika conductive primer with the earthing grid and Sikadur 501 IN filler; where cleanroom-grade emission control is not required and only ESD/anti-static performance is needed, Sikafloor-264 ECF is the more economical Sika sibling. As authorised Sika distributors and applicators we also supply genuine equivalents from other brands we carry, so specifiers can match budget and lead time without compromising compliance.
Fosroc Nitoflor SL Conductive / Dissipative — A specifier may prefer the Fosroc option where the brief is straightforward conductive or dissipative ESD flooring for electronics, clean rooms or theatres, and full cleanroom outgassing/particle certification is not the governing requirement.
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