About STP ShaliFloor 3E SL ASC

ShaliFloor 3E SL ASC is STP Limited’s answer to a specific and unforgiving problem: how to floor a space where a stray electrostatic spark could ignite solvent vapour, explosive dust or pyrotechnic material. It is a three-component epoxy self-levelling system — a pigmented Bisphenol-A epoxy base, a cycloaliphatic hardener, and a graded conductive filler that makes up the bulk of the mix. Poured and rolled to a nominal 2 mm, it cures into a single seamless sheet with no joints or pores for charge, dust or contamination to hide in. Unlike an ordinary decorative epoxy floor, every square metre is part of a deliberate electrical circuit that carries static charge down through the floor to an earthing grid.

For engineers and safety officers in India, the appeal is that one product does two jobs at once. It gives the hard-wearing, chemical-resistant, wipe-clean surface that any process area needs, while holding surface resistance below 10^6 ohm so that people and trolleys are continuously and safely discharged. Because Space Arc Engineering supplies and applies the system as an authorised STP distributor and applicator across Delhi NCR and Pan-India, the earthing detailing, primer selection and conductivity testing are handled as one package rather than left to chance on site — which is where most ESD floors quietly fail.

The technical insight

The conductivity is not a coating trick — it is built into the body of the floor. STP loads the epoxy with a graded conductive filler (40-50% of the mix by the manufacturer’s own data), so carbon-based conductive particles form a continuous network right through the 2 mm section rather than sitting only on the surface. That is why the floor keeps working even as it wears: abrasion exposes fresh conductive material instead of removing a thin antistatic skin. The network gives a measured resistance path to earth below 10^6 ohm, firmly in the conductive band, so a charge picked up on a shoe or a drum trolley bleeds away in milliseconds instead of building to a spark. For the system to behave as designed, that network must terminate somewhere — copper earthing strips are laid under the floor on a grid and bonded to the building’s earth, and a conductive primer ties the resin body to those strips. Get the earthing grid and primer right and the whole floor becomes one large, slow-draining electrode; skip them and even a perfectly conductive resin has nowhere to send the charge.

Where it is used

• Ammunition, propellant and pyrotechnic magazines where any spark risk is unacceptable
• Solvent handling, blending and decanting halls with flammable vapour
• Explosive-powder and fine-dust processing areas classed as ATEX Zone 1 or Zone 2
• Petrochemical and paint-manufacturing units with explosive atmospheres
• Defence and ordnance stores and assembly bays
• Electronics and semiconductor assembly where static damages components
• Battery manufacturing and charging rooms with hydrogen-release risk
• Printing and coating lines using flammable inks and solvents

Key advantages

• Continuous conductive path with surface resistance below 10^6 ohm for rapid static discharge
• Conductivity built through the full 2 mm body, so it survives wear rather than rubbing off
• Seamless, non-porous, monolithic finish with no joints to trap dust or charge
• High compressive strength above 60 MPa for heavy trolley and forklift traffic
• Good resistance to solvents, fuels and mild acids in typical process areas
• Smooth, hygienic, easy-to-clean surface suited to controlled environments
• Self-levelling placement gives a flat, even floor with minimal trowel marks
• Supplied and installed by an authorised STP applicator with on-site conductivity testing

Limitations & considerations

• Performance depends entirely on a correctly installed and bonded copper earthing grid — the resin alone is not a substitute for earthing
• Conductive fillers make it a dark-toned floor; it is not intended for bright decorative or colour-critical finishes
• The substrate must be dry, sound and moisture-controlled, or the bond and conductivity readings will suffer
• It is combustible once cured and gives off noxious fumes in a fire, so it guards against ignition, not against burning
• Correct blend ratios and pot-life discipline are critical; poor site mixing can leave resistance out of the conductive band
• At 2 mm it is a wearing floor topping, not a structural or heavy-impact screed

Selection & best practice

Specifications

Industry use cases

How we position STP ShaliFloor 3E SL ASC

ShaliFloor 3E SL ASC sits at the specialist, safety-critical end of STP’s ShaliFloor range. Where a project needs the same seamless epoxy quality but not the conductive circuit, the standard ShaliFloor SL self-levelling epoxy is the straightforward choice; for heavier chemical exposure, STP’s ShaliCoat and screed-grade toppings step up the resistance and thickness. The conductive system pairs naturally with a conductive primer and copper earthing accessories, which Space Arc supplies as part of the same package. Across our other brands, buyers comparing ESD options often look at Fosroc’s Nitoflor conductive/dissipative floors as an equivalent, and MC-Bauchemie and Sika offer their own conductive resin systems — we can specify whichever best fits the hazardous-area classification, budget and lead time on your project.

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