STP ShaliFloor SL NES TC
A solvent-free, glass-flake reinforced novolac epoxy topping built for floors that take a daily beating from acids, solvents and aggressive process chemicals.
What is it?
A two-component, solvent-free, self-levelling novolac epoxy floor topping from STP, reinforced with glass flake and supplied in pre-weighed packs for on-site mixing.
Where is it used?
Chemical and pharmaceutical process floors, acid rooms, secondary containment bunds, laboratories and storage-tank areas where standard epoxy would not survive.
Why use it?
Novolac chemistry plus a glass-flake barrier gives it far better acid, solvent and alkali resistance than a conventional bisphenol-A epoxy, and it lays down joint-free and impervious.
How is it applied?
Prime the prepared concrete with a solvent-free epoxy primer, then apply the mixed topping at 250-500 microns per coat and allow it to self-level to a glossy finish.
About STP ShaliFloor SL NES TC
Most industrial floor coatings are fine until the first acid spill. ShaliFloor SL NES TC is built for exactly the environments where an ordinary epoxy chalks, softens or lifts. It is a two-part, solvent-free system based on novolac epoxy resin rather than the standard bisphenol-A backbone, and that single change in chemistry is what lets it stand up to concentrated acids, aromatic solvents and hot chemical splashes that would destroy a general-purpose floor. STP supplies it as a pigmented, glossy topping in pre-weighed packs, so the mix ratio is fixed at the factory and the applicator simply combines the components on site.
The other half of the story is the glass flake. Fine glass platelets are dispersed through the resin, and as the coating cures they align roughly parallel to the surface, forming an overlapping barrier that any chemical has to fight its way around rather than straight through. That tortuous path slows permeation, reduces the chance of pinhole failure and adds mechanical toughness to the film. The result is a seamless, impervious, easy-to-clean surface that resists heat as well as chemicals, which is why it turns up on floors in chemical plants, pharma API blocks, battery rooms and containment bunds rather than in a warehouse or a showroom.
The technical insight
The performance comes from two mechanisms working together. First, the resin: novolac epoxies carry a higher density of epoxide groups per molecule than standard bisphenol-A epoxies, so once cured they form a more tightly crosslinked network. That denser network leaves fewer sites for acids and solvents to attack and gives markedly better resistance to strong acids and aggressive solvents, plus better heat resistance. Second, the glass flake: the platelets create a physically tortuous diffusion path, so aggressive media cannot travel straight down to the concrete and instead have to work laterally around each flake. Together they turn the coating into a genuine chemical barrier rather than just a decorative wear layer, while the solvent-free, self-levelling formulation cures joint-free with no solvent entrapment or shrinkage voids that could later become failure points.
Where it is used
- Process floors in chemical manufacturing plants exposed to acid and solvent splash
- Pharmaceutical and API production areas needing an impervious, cleanable surface
- Petrochemical secondary containment and bund floors
- Battery-charging rooms and acid storage areas
- Laboratory floors with routine aggressive-chemical contact
- Storage-tank farm floors and chemical decanting zones
- Internal lining of shallow containment pits and trenches where chemical resistance is critical
Key advantages
- Novolac backbone resists strong acids, solvents and alkalis far better than standard epoxy
- Glass-flake reinforcement creates a permeation barrier and adds film toughness
- Solvent-free (100% solids), so no solvent-entrapment voids and minimal odour during cure
- Self-levelling to a smooth, glossy, joint-free finish that is easy to wash down
- Impervious surface resists chemical soak-in and does not support bacterial growth
- Pre-weighed packs fix the mix ratio and reduce site batching errors
- Withstands elevated temperatures, useful around hot process lines and spills
- Builds a workable film at 250-500 microns per coat for a robust chemical layer
Limitations & considerations
- A topping, not a screed – it needs a sound, primed concrete base and will not bridge structural cracks or heavy undulations
- Short pot life of 1-2 hours means only what can be laid in that window should be mixed
- Solvent-free self-levelling systems demand a flat, well-prepared substrate; hollows and high spots show through
- Full chemical cure takes up to 7 days, so aggressive service must wait for the coating to harden fully
- Glossy finish alone can be slippery when wet – specify an anti-skid broadcast where foot traffic and spills coexist
- Best applied within a controlled temperature and humidity window by a trained applicator, not a general labour crew
Selection & best practice
Start with the substrate: the concrete must be structurally sound, dry and mechanically prepared (shot-blasting or grinding) to an open, laitance-free profile, with a moisture check done before any resin goes down. Prime with a solvent-free epoxy primer such as ShaliPrime 2EC and let it tack off so the topping bonds and does not pinhole. Because the pot life is only 1-2 hours, mix each pre-weighed pack completely, decant to a clean container, remix, and lay it immediately – do not stretch a batch. Apply at 250-500 microns per coat, spread evenly and let it self-level, back-rolling or spike-rolling to release air. Protect the fresh floor from dust, water and traffic, and hold it out of aggressive chemical service until it has cured through, up to seven days depending on temperature. Where the floor sees both spills and foot traffic, broadcast an anti-skid aggregate into the wet coat for grip.
Specifications
| Product type | 2K solvent-free, self-levelling novolac epoxy floor topping |
| Reinforcement | Glass-flake filled |
| Solids content | 100% (solvent-free) |
| Finish | Glossy, pigmented, joint-free |
| Applied thickness | 250-500 microns per coat |
| Pot life | 1-2 hours (temperature dependent) |
| Curing time | 1-7 days for full cure |
| Packing | Pre-weighed two-component packs for on-site mixing |
| Recommended primer | ShaliPrime 2EC or equivalent solvent-free epoxy primer |
Industry use cases
Chemical Manufacturing
Reactor halls and decanting floors where concentrated acids and solvents are spilled daily need the novolac barrier to keep the slab intact.
Pharmaceuticals
API and formulation blocks require an impervious, seamless, cleanable surface that resists process chemicals and does not harbour contamination.
Petrochemical & Storage
Secondary containment bunds and tank-farm floors rely on the impervious film to hold a spill long enough for safe recovery.
Battery & Acid Rooms
Charging bays and acid-storage areas face continual sulphuric acid contact that standard epoxy cannot survive, making novolac the sensible specification.
Laboratories
QC and R&D floors with routine reagent contact benefit from a glossy, chemical-resistant surface that wipes clean.
Frequently asked questions
How is ShaliFloor SL NES TC different from a normal epoxy floor coating?
What thickness should it be applied at?
Does it need a primer?
How long before the floor can be put into chemical service?
Is the glossy surface slippery?
Can Space Arc supply and apply it across India?
How we position STP ShaliFloor SL NES TC
ShaliFloor SL NES TC sits at the heavy-chemical end of STP’s ShaliFloor flooring range. Where the exposure is mechanical wear rather than aggressive chemistry, the standard self-levelling ShaliFloor SL TC epoxy toppings are the more economical choice, and ShaliPrime 2EC is the matching solvent-free primer beneath the novolac coat. For projects standardised on other brands we carry, the equivalent chemical-resistant epoxy floor systems from Fosroc’s Nitoflor line and MC-Bauchemie cover the same duty, so the specification can follow whichever approved-vendor list the project runs on.
Fosroc Nitoflor FC50 — A specifier already standardised on Fosroc may prefer FC50 as a solvent-free, chemical- and abrasion-resistant epoxy floor coating, though for the most aggressive acid and solvent exposure the novolac chemistry of ShaliFloor SL NES TC is the stronger barrier.
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