STP ShaliProtek NES 100
Solventless two-component novolac epoxy that shields concrete and steel from hot acid, alkali and solvent attack in the most aggressive process areas.
What is it?
A 2K solventless, high-heat-resistant novolac epoxy coating from STP, cured with an amine adduct, engineered to protect concrete and steel against splash and spillage of concentrated chemicals at elevated temperature.
Where is it used?
Chemical process floors, secondary containment, solvent and acid storage areas, pump pads, trenches and reactor zones where ordinary epoxies fail.
Why use it?
The novolac backbone gives it far broader and more durable chemical resistance than standard bisphenol-A epoxies, with zero solvent for use in enclosed plants.
How is it applied?
Applied by brush or short-nap squeegee roller at 150-200 microns WFT, or airless spray at 200-250 microns, over a properly prepared and primed substrate.
About STP ShaliProtek NES 100
ShaliProtek NES 100 sits at the top of STP’s novolac coating range, and it exists for one reason: to survive where general-purpose epoxy floor and tank coatings quietly break down. In real plants, spilled acid rarely arrives cold and dilute. It arrives hot, concentrated, and mixed with solvents, and it sits on the concrete or steel until the next wash-down. This coating is a solventless, two-component novolac epoxy cured with an amine adduct, formulated specifically for that punishing splash-and-spillage duty at raised temperature rather than for general lining work.
Because it carries no solvent, the film builds thickly in a single pass and gives off effectively zero VOC, which matters when you are coating inside a bund, a trench or an enclosed reactor room with limited ventilation. The two parts are supplied at a 3:1 mix ratio by volume and can be tinted to the colour the job needs. For Space Arc’s clients across Delhi NCR and pan-India, NES 100 is the grade we reach for when a consultant has specified true chemical containment and the earlier NES 60 or NES 70 grades no longer have the headroom on temperature or aggressiveness of media.
The technical insight
The performance comes from chemistry, not thickness. A standard epoxy is built on a bisphenol-A backbone with a limited number of reactive sites; a novolac epoxy is built on a phenol-formaldehyde resin that carries many more epoxide groups per molecule. When cured, that produces a far denser, more highly cross-linked network. The practical result is a film with very few pathways for aggressive molecules to diffuse through, so hot sulphuric acid, caustic soda and hydrocarbon solvents struggle to penetrate and undercut the coating. The tighter network also holds together at higher service temperatures, which is why this grade tolerates hot spillage that would soften and blister a conventional epoxy. The solventless formulation reinforces this: with no solvent to flash off, there are no micro-voids left behind as the film cures, giving a continuous, low-porosity barrier that is the real line of defence for the substrate underneath.
Where it is used
- Secondary containment bunds and dyke walls around chemical storage tanks
- Concrete floors in chemical process and reactor areas exposed to hot spillage
- Acid and solvent storage room floors and plinths
- Pump pads, equipment plinths and trench linings in process plants
- Protection of steel structures and equipment in corrosive high-temperature zones
- Loading and decanting bays where concentrated chemicals are handled
- Bridge and structural elements subject to aggressive chemical exposure
- Effluent and neutralisation areas where mixed acids and alkalis are present
Key advantages
- Novolac chemistry delivers broad-spectrum resistance to concentrated acids, alkalis and solvents
- Withstands hot splash and spillage that softens or blisters standard bisphenol-A epoxies
- Solventless, zero-VOC formulation suited to enclosed bunds, trenches and reactor rooms
- Protects both concrete and steel substrates from a single specified system
- High-build film in fewer coats thanks to 100% solids content
- Dense, low-porosity cured film gives a genuinely continuous chemical barrier
- Can be tinted to the required colour for zoning or identification
- Backed by Space Arc as authorised distributor and applicator with site support
Limitations & considerations
- It is a chemical-protection coating, not a decorative or light-duty floor paint, and is priced accordingly
- Performance depends heavily on surface preparation; poorly prepared or damp concrete will cause failure
- Amine-cured epoxies can amber or chalk under UV, so it is intended for industrial rather than aesthetic exposed use
- Application demands controlled conditions and trained applicators, not general painting crews
- Resistance to any specific chemical, concentration and temperature must be confirmed against the current chemical-resistance chart before specifying
- Pot life is limited once mixed, so batches must be sized to the working area and consumed promptly
Selection & best practice
Success with NES 100 is decided before the first coat goes on. Concrete must be sound, cured, dry and mechanically prepared, ideally by captive-shot blasting or diamond grinding to remove laitance and open the pore structure; steel should be abrasive-blasted to the specified standard and coated before flash rusting. Prime the surface as recommended and apply the coating within the overcoat window. Mix Component A and B strictly at the 3:1 ratio by volume, mixing full units rather than eyeballing part-packs, and only mix what the crew can apply within the pot life. Build the film by brush or short-nap squeegee roller at 150-200 microns WFT, or by airless spray at 200-250 microns using a 0.48-0.88 mm tip at 210-250 kg/cm2; where a second coat is called for, apply it after the first has dried, roughly 6-8 hours at 30°C. Protect fresh coating from water, dust and traffic through the cure period and always cross-check the intended media against STP’s chemical-resistance data. Space Arc’s applicators handle this routinely and can advise on primer choice and system build for the specific exposure.
Specifications
| Product type | 2K solventless, high-heat-resistant amine-adduct novolac epoxy |
| Substrates | Concrete and steel |
| Mix ratio | Component A : Component B = 3 : 1 by volume |
| Colour | Available in any colour |
| VOC / solids | Solventless, effectively zero VOC (100% solids) |
| Application WFT | 150-200 microns by brush/roller; 200-250 microns by airless spray |
| Airless spray setup | Tip 0.48-0.88 mm, tip pressure 210-250 kg/cm2 |
| Overcoat interval | Apply second coat after first has dried (approx. 6-8 hours at 30°C) |
| Chemical resistance | Continuous service against 50% NaOH, 98% sulphuric acid, 10% phosphoric acid, diesel/petrol; splash/spill resistance to 10% nitric acid and benzyl alcohol |
Industry use cases
Bulk chemical & agrochemical plants
Lining secondary containment and process floors where concentrated acids and alkalis are stored and handled hot.
Pharmaceutical & fine chemicals
Protecting solvent storage areas, reactor rooms and decanting bays that demand a solventless, low-porosity barrier.
Refineries & petrochemical
Coating pump pads, trenches and steelwork against hydrocarbon solvents and aggressive spillage.
Fertiliser & effluent treatment
Shielding concrete in neutralisation and effluent zones exposed to mixed acids and caustic.
Metal finishing & pickling lines
Guarding floors and plinths around acid pickling and plating operations from continuous corrosive attack.
Frequently asked questions
How is ShaliProtek NES 100 different from the NES 60 and NES 70 grades?
Can it be applied to steel as well as concrete?
Is it suitable for immersion or only for splash and spillage?
What surface preparation does it need?
Does the solventless formulation help in enclosed areas?
Does Space Arc supply and apply NES 100, or just sell it?
How we position STP ShaliProtek NES 100
Within STP’s own range, NES 100 is the premium choice: step down to ShaliProtek NES 60 or NES 70 where the temperature and chemical severity are lower, or pair it with STP’s ShaliPrime epoxy primers and ShaliFloor systems where a broader flooring package is needed. Across the brands Space Arc carries, buyers weighing NES 100 also consider Fosroc’s Nitocote and Nitoflor chemical-resistant coatings and, for tank and immersion work, specialist MC-Bauchemie linings; our team can help match the exact media, temperature and substrate to the right system rather than defaulting to a single brand.
Fosroc Nitocote EN901 — A specifier standardised on Fosroc, or needing its documented pH 1-14 resistance and full immersion track record, may prefer this solvent-free novolac epoxy over the STP equivalent.
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Authorised distribution, technical advice & professional application across Delhi NCR and Pan-India.