About STP ShaliProtek NES 60

ShaliProtek NES 60 is STP’s answer to one of the hardest problems in industrial construction: keeping a concrete floor intact when it is being splashed with acid, drenched in solvent, or bathed in corrosive fumes day after day. It is a two-component novolac phenolic epoxy, supplied as a 62 percent volume-solids system that cures into a hard, chemically inert film bonded tightly to the slab. Unlike a general-purpose epoxy floor coating, this product is formulated specifically for the aggressive service found in acid plants, fertilizer units, annealing and ammonium sulphate lines, and leather-processing works, where ordinary coatings blister and fail within months.

For contractors and consultants specifying protection in these environments, the appeal is straightforward. It handles elevated temperature exposure, remains serviceable up to 90C in the dry state, and resists a broad slate of chemicals including caustic soda, hydrochloric, nitric, sulphuric and phosphoric acids, and fuels. As an authorised distributor and applicator across Delhi NCR and Pan-India, Space Arc supplies the coating alongside its matched STP primers and can advise on build-up, DFT and site sequencing so the system performs the way the data sheet promises.

The technical insight

The chemistry is what sets this coating apart. Standard epoxies are built on a bisphenol-A resin, which leaves a relatively open molecular structure that aggressive acids and solvents can slowly penetrate and break down. A novolac epoxy instead uses a phenol-formaldehyde (novolac) resin carrying multiple reactive epoxide groups per molecule. When cured, this produces a far higher crosslink density, a tighter, more heavily bonded network that gives permeating chemicals very few pathways to attack. That dense network is the reason ShaliProtek NES 60 shrugs off strong acids and alkali vapours and keeps its integrity at temperatures where a conventional epoxy would soften. The trade-off inherent to any high-crosslink film is reduced flexibility, which is why the product is specified as a protective lining over rigid concrete substrates rather than a movement-tolerant membrane.

Where it is used

• Chemical-resistant flooring in acid, ammonium sulphate and annealing plants
• Secondary containment bunds, trenches and pump pads exposed to spillage
• Solvent and chemical storage-area floors and low walls
• Fertilizer plant process floors subject to acid and alkali fumes
• Leather-processing unit floors facing continuous chemical wetting
• Concrete protection in high-temperature exposure zones up to 90C
• Loading, decanting and drum-handling areas where corrosive splash occurs
• Lining to high-exposure concrete on bridges and industrial process structures

Key advantages

• Excellent resistance to a wide range of acids, alkalis and solvents due to novolac crosslinking
• Retains performance at elevated service temperature up to 90C dry
• Low-VOC formulation, easier to use in enclosed process areas
• Bonds well even at low temperature and humidity
• Short recoat window of 10-12 hours keeps multi-coat programmes moving
• High-build capability at 200-250 micron DFT in fewer coats
• Strong adhesion to concrete (greater than 2.6 N/mm2) and good abrasion resistance
• Passes 2000-hour salt spray, suiting corrosive and coastal industrial sites

Limitations & considerations

• A rigid, high-crosslink film with limited elongation (15-20%); it is not a crack-bridging or movement-accommodating membrane
• Requires a properly primed, sound and dry concrete substrate; direct application over unprimed or damp slabs risks debonding
• Two-component product with a 3-4 hour pot life at 27C, so mixed material must be applied promptly and cannot be left in the pack
• Concentrated or specialised chemical exposures fall outside the standard resistance list and warrant a project-specific check
• Supplied only in fixed 15 L composite packs at 2:1 ratio, so part-mixing at odd ratios is not advisable

Selection & best practice

Specifications

Industry use cases

How we position STP ShaliProtek NES 60

ShaliProtek NES 60 sits at the aggressive-chemical end of STP’s protective-coating range. Within the same STP family, pair it with ShaliPrime 2E for concrete and ShaliPrime Zn Ph for steel as the specified primers, and consider ShaliProtek NES 100 where an even higher build or a stepped chemical-resistance system is called for. For milder, general-purpose industrial floors that do not face strong acids, a standard bisphenol-A epoxy floor coating is more economical and easier to place. Where a client’s specification is written around Fosroc, the closest equivalent is Fosroc Nitocote EN901, which Space Arc also stocks. As a multi-brand distributor we can cross-match across STP, Fosroc, Sika, MC-Bauchemie and Dr. Fixit so the coating fits the project rather than the other way around.

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