Fosroc Nitoflor NT Slurry
Coal-tar-free, solvent-free epoxy anti-skid wearing course for bridge decks, RO/RO linkspans, car parks and ramps — applied over concrete, steel and timber.
What is it?
A two-component, coal-tar-free and solvent-free epoxy resin slurry that is laid and then blinded with hard-wearing aggregate to form a lightweight, abrasion-resistant, anti-skid wearing course.
Where is it used?
Bridge and flyover decks, RO/RO linkspans and jetties, multi-storey and surface car parks, garages, ramps, loading bays, walkways, cycle paths and steel work platforms.
Why use it?
It delivers a tough, non-slip, waterproof running surface that bonds to concrete, blast-cleaned steel and timber, stays grippy when wet, and — unlike older coal-tar systems — avoids coal tar for a cleaner site and occupational profile.
How is it applied?
Concrete is primed with Nitoprime 25 and steel is blast-cleaned to Sa 2½; the mixed resin is squeegee/trowel-applied at a designed thickness, the selected aggregate is broadcast into the wet film, and excess is removed once cured.
About Fosroc Nitoflor NT Slurry
Fosroc Nitoflor NT Slurry is a resin-based anti-skid wearing course used to protect and texture heavily trafficked horizontal surfaces. The product is supplied as pre-weighed liquid components that are site-mixed into a homogeneous slurry, applied to the prepared substrate, and immediately dressed (broadcast) with specially graded hard-wearing aggregate. Once cured, the result is a lightweight, durable, non-slip running surface that resists abrasion, impact and a range of chemicals while keeping water out of the deck below.
The “NT” in the name marks the most important commercial point: Nitoflor NT Slurry is coal-tar-free and solvent-free. It is the cleaner-formulation counterpart to Fosroc’s long-established Nitoflor ET Slurry, which is openly described in Fosroc literature as a “solvent-free coal tar epoxy resin product.” Many asset owners, public-sector clients and EHS-conscious contractors now specify away from coal-tar binders, and NT Slurry exists to serve exactly that demand without giving up the field-proven performance of the ET family. It carries the same anti-skid, lightweight, waterproof design intent — just without the coal tar.
For Indian projects, NT Slurry sits in Fosroc’s industrial and infrastructure flooring portfolio and is typically used where a thin, lightweight overlay is preferred over a thick screed: re-decking ageing bridges, upgrading car-park ramps, surfacing steel link-spans and decks, and creating safe, washable footways. Because the system is built around a designed thickness and an aggregate broadcast rather than a self-levelling pour, the installed texture and slip resistance can be tuned to the traffic — pedestrian, light vehicular or heavy vehicular — by selecting the dressing aggregate grade and build-up.
Space Arc Engineering supplies and applies Nitoflor NT Slurry as an authorised Fosroc distributor and applicator across Delhi NCR and Pan-India. Because the published online product page is a summary and the full numeric datasheet is region-gated, we recommend confirming the India-specific TDS, pack configuration and current aggregate grades for your exact specification before ordering — our technical team will issue these against your project requirement.
The technical insight
The core of the system is a cold-cured epoxy slurry binder rather than a cementitious or coal-tar one. Fosroc’s slurry-wearing-course family is characterised by a mixed-system density in the order of 1.78–1.85 g/cc and a short working window — about 30 minutes pot life at 30°C — which is why pre-weighed packs and disciplined, gang-based laying are essential in Indian site temperatures. Strength is generated by the resin matrix plus the broadcast aggregate interlock; Fosroc’s published mechanical data for the slurry system shows roughly 35 N/mm² compressive, 8 N/mm² tensile and 15 N/mm² flexural strength to BS 6319 (Parts 2, 7 and 3 respectively). The product is deliberately thin and light — typically 3 to 5 mm depending on traffic — so it adds running-surface durability and slip resistance to a deck without the dead load of a conventional concrete or polymer screed, which is decisive when overlaying existing bridges and structures. The decisive engineering distinction from the older ET Slurry is the binder: NT Slurry omits coal tar entirely, so the cured film behaves like a clean epoxy wearing course while retaining the anti-skid, waterproof and chemical-resistant character of the original.
Where it is used
- Concrete and steel bridge / flyover deck wearing surfaces and re-decking overlays
- RO/RO linkspans, jetties and loading platforms in ports and marine works
- Multi-storey and surface car-park decks, ramps, turning circles and speed-control areas
- Garage floors, service ramps and loading bays subject to tyre scuffing and oil
- Pedestrian walkways, footbridges, cycle paths and access decks needing wet-grip
- Steel work platforms, gangways and helicopter / ship decks requiring a non-slip finish
- Light-to-medium industrial floors where a thin, lightweight anti-skid topping is preferred over a thick screed
Key advantages
- Coal-tar-free and solvent-free formulation — cleaner site, better occupational and environmental profile than legacy coal-tar slurries
- Lightweight build (typ. 3–5 mm) ideal for overlaying ageing bridges and structures without major dead-load penalty
- Excellent wet and dry slip resistance from the broadcast hard-wearing aggregate
- Bonds to concrete (via Nitoprime 25), blast-cleaned steel and timber substrates
- Waterproof, water-impermeable wearing course that helps protect the deck below from corrosion
- Chemically resistant to fuels, oils, greases, de-icing salts and dilute mineral acids and alkalis
- Hard-wearing and impact-resistant with proven abrasion performance for trafficked decks
- Supplied in pre-weighed packs for consistent, ready-to-use site mixing
Limitations & considerations
- Short pot life (about 30 min at 30°C) demands trained gangs, pre-planning and small batch discipline — challenging in peak Indian summer heat
- Not self-levelling and not a thick repair screed — it is a thin texture/wearing course, so deep profiling or reprofiling must be done first
- Substrate preparation is unforgiving: steel must be blast-cleaned to Sa 2½ and concrete primed with Nitoprime 25, free of laitance, oil and loose material
- Performance and slip rating depend on correctly selected and correctly broadcast aggregate; under-dressing or over-rolling compromises the finish
- Epoxy systems are moisture- and temperature-sensitive at application — damp, contaminated or cold/over-hot substrates risk poor cure and adhesion
- Coverage varies with build-up and surface profile, so wastage must be allowed for on rough or porous decks
- Full numeric values shown here are drawn from the Fosroc slurry-system datasheet; the exact India NT-Slurry TDS, pack sizes and aggregate grades should be confirmed before specifying
Selection & best practice
Treat preparation and timing as the whole job. Blast-clean steel to Sa 2½ and apply the slurry promptly before any flash-rust; mechanically scarify or blast concrete to remove laitance, then prime with Nitoprime 25 and lay the slurry while the primer is still tacky. Plan small, fast batches because pot life is only ~30 minutes at 30°C — in Delhi-NCR summers schedule laying for cooler hours, keep components shaded, and mix only what a gang can place and dress before gel. Lay to the designed thickness for the traffic class (light, medium or heavy), broadcast the specified aggregate generously into the wet film for full anti-skid coverage, and remove loose excess only after cure. Protect the fresh surface from rain, dew and traffic until it has gained strength, and always work from the current India TDS and method statement issued by Space Arc Engineering for your specific deck.
Specifications
| Product type | Coal-tar-free, solvent-free resin (epoxy) anti-skid slurry wearing course |
| Components | Two-component liquid system (pre-weighed packs), site-mixed |
| Finish | Resin slurry blinded with broadcast hard-wearing aggregate (non-slip texture) |
| Substrates | Prepared concrete, blast-cleaned steel, timber |
| Density (mixed system) | ≈ 1.78–1.85 g/cc (Fosroc slurry-system data) |
| Pot life | ≈ 30 minutes at 30°C |
| Typical thickness (by traffic) | Light 3.0–3.5 mm / Medium 3.5–4.0 mm / Heavy 4.0–5.0 mm |
| Compressive strength | ≈ 35 N/mm² (BS 6319 Part 2) |
| Tensile strength | ≈ 8 N/mm² (BS 6319 Part 7) |
| Flexural strength | ≈ 15 N/mm² (BS 6319 Part 3) |
| Chemical resistance | Petrol, diesel, kerosene/aircraft fuel, oils, greases, de-icing salts, dilute mineral acids & alkalis |
| Primer (concrete) | Nitoprime 25 epoxy primer (apply slurry while tacky) |
| Steel preparation | Blast clean to minimum Sa 2½ |
| Key feature | Coal-tar-free and solvent-free (vs coal-tar-based Nitoflor ET Slurry) |
Industry use cases
Bridges & flyovers
Lightweight anti-skid re-decking and new deck wearing surfaces where added dead load must be minimised on existing or long-span structures.
Ports & marine
Durable, fuel- and salt-resistant non-slip surfacing for RO/RO linkspans, jetties, loading platforms and steel decks in wet, aggressive environments.
Car parks & automotive
Grippy, wear-resistant decks, ramps and turning areas in multi-storey and surface car parks, garages and service bays subject to tyre scuffing and oil.
Urban infrastructure
Safe wet-grip footbridges, walkways, cycle paths and access decks for municipal and public-realm projects specifying coal-tar-free materials.
Industrial & aviation
Non-slip steel work platforms, gangways and apron/deck areas, and light-to-medium industrial floors needing a thin, tough anti-skid topping.
Frequently asked questions
Is Fosroc Nitoflor NT Slurry an epoxy or a polyurethane?
What is the difference between Nitoflor NT Slurry and ET Slurry?
How thick is the applied wearing course and what coverage should I plan?
What surface preparation does NT Slurry need?
Can it handle Indian summer temperatures during application?
Does Space Arc supply NT Slurry across India and provide the datasheet?
How we position Fosroc Nitoflor NT Slurry
Nitoflor NT Slurry occupies a specific niche in Fosroc’s flooring range: a thin, lightweight, anti-skid wearing course for decks and trafficked surfaces, distinguished by its coal-tar-free, solvent-free formulation. Within the Fosroc family its closest relative is Nitoflor ET Slurry (and ET Slurry R), the coal-tar versions — choose ET where coal tar is acceptable and NT where it must be avoided; it pairs with Nitoprime 25 as the concrete primer and sits alongside heavier-duty Fosroc floor toppings such as the Nitoflor screed and self-levelling ranges for thicker industrial floors. Against competitors, the comparable anti-skid / bridge-deck and car-park surfacing options come from Sika (Sikafloor and Sika deck-surfacing systems), MBCC/Master Builders Solutions (MasterTop and deck membranes), and STP Limited for waterproofing-led deck systems; Dr. Fixit (Pidilite) competes more on the waterproofing-membrane side than on true broadcast anti-skid wearing courses. NT Slurry’s strongest case is where a client wants proven Fosroc anti-skid deck performance but explicitly without coal tar — there it is the natural, like-for-like upgrade from the older ET system, and Space Arc Engineering can supply and apply it, or advise on the right Fosroc or alternative system if your loading, chemical exposure or thickness needs point elsewhere.
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