Fosroc Nitoflor Coving U
Trowel-applied polyurethane coving mortar that forms a seamless, hygienic radius cove between floor and wall for food, dairy and pharmaceutical environments.
What is it?
A three-component, trowel-applied polyurethane (PU) coving mortar used to form a smooth, radiused cove fillet where industrial resin floors meet walls, plinths, bunds and equipment bases.
Where is it used?
Food and beverage plants, dairies, breweries, pharmaceutical and cleanroom facilities, commercial kitchens, bund and tanked areas, and heavy-duty engineering floors paired with Nitoflor SL self-levelling and PU screed systems.
Why use it?
It eliminates the sharp 90-degree floor-to-wall junction where dirt, bacteria and washdown water collect, creating an easy-to-clean, crevice-free coved transition that supports HACCP and GMP hygiene standards.
How is it applied?
Onto a sound, primed concrete substrate (Nitoprime UR2), the three components are blended and trowelled against a former or by hand to a typical 25–50 mm radius cove, then over-coated with Nitoflor HB300 U for colour and chemical resistance.
About Fosroc Nitoflor Coving U
Fosroc Nitoflor Coving U is a three-component, trowel-applied polyurethane coving mortar engineered to form the radiused skirting, or “cove”, between a resin floor and the adjoining wall, plinth or equipment base. In a hygienic process environment, the most vulnerable detail is rarely the open floor field; it is the junction where the floor meets a vertical surface. A square 90-degree corner traps food debris, biofilm and washdown water, and it is almost impossible to clean reliably. Nitoflor Coving U solves this by building a continuous, smooth radius that lets water, foam and cleaning chemicals run off freely and lets a mop or hose reach every surface.
The product belongs to the Fosroc Nitoflor polyurethane-cement family and is designed to be installed as an integral part of a flooring system rather than as a standalone product. It is most commonly used alongside Nitoflor SL self-levelling epoxy and PU floors, but it also detail-finishes heavier PU screed systems, bunds and tanked containment areas. Because it is water-based and non-tainting, it is suited to areas where food, beverages or pharmaceutical products are produced or stored. It cures to a matt, lightly textured finish and, once over-coated with Nitoflor HB300 U, delivers a hard-wearing, chemically resistant and easily sanitised cove that visually matches the floor.
For specifiers and contractors in India, Coving U is the detailing component that turns a flat industrial floor into a genuinely hygienic, washdown-ready system. Space Arc Engineering supplies it as an authorised Fosroc distributor and applicator across Delhi NCR and Pan-India, and can package it with the matching primer, floor and topcoat so the complete cove-to-floor build-up is sourced and installed as one specification.
The technical insight
Coving U is a polyurethane (PU) mortar, not an epoxy, and that chemistry matters for the cove detail. PU systems tolerate the thermal cycling of hot washdowns and steam cleaning better than rigid epoxies and are less prone to cracking at the floor-to-wall junction where movement concentrates. The three-component pack — resin, hardener and a graded filler/aggregate — is blended on site to a stiff, trowellable mortar with a short pot life of about 15 minutes at 20°C, so material must be mixed in small, disciplined batches and worked quickly against a coving former. Coverage is approximately 1.8–2.0 kg of mixed material per square metre per millimetre of thickness, which on a typical 25–50 mm radius cove translates to a meaningful kg-per-linear-metre figure that should be estimated from the chosen cove profile before ordering. The substrate is the make-or-break factor: concrete must be a minimum of 25 MPa compressive strength (or greater than ~1.5 MPa surface tensile strength) and must be primed with Nitoprime UR2; ground-bearing slabs need an effective damp-proof membrane because trapped rising moisture is the most common cause of adhesion failure in PU cove and floor systems.
Where it is used
- Forming hygienic radius coves where Nitoflor SL and PU resin floors meet walls and partitions in food and beverage production halls
- Sealing the floor-to-plinth and floor-to-equipment-base junctions in dairies, breweries and beverage bottling lines
- Detailing bund walls and tanked containment areas so spills are channelled and contained without crevices
- Coving in pharmaceutical, nutraceutical and cleanroom suites that must meet GMP cleanability requirements
- Skirting and upstand details in commercial and institutional kitchens, cold stores and wet processing areas
- Cove finishing of heavy-duty engineering and warehouse floors where regular wet cleaning is carried out
Key advantages
- Eliminates the unhygienic 90-degree floor-to-wall junction, creating a smooth radius cove that drains and cleans easily
- Water-based and non-tainting, making it suitable for food, dairy and pharmaceutical production areas
- Polyurethane chemistry resists thermal shock from hot washdowns and steam cleaning better than rigid epoxy coving
- Resistant to a broad range of process chemicals including citric, acetic (vinegar) and lactic acids, alcohols, oils and many inorganic acids
- Integrates seamlessly with Nitoflor SL floors and Nitoflor HB300 U topcoat for a single, colour-matched system
- Trowel-applied to a custom radius so the cove can be tailored to the project’s hygiene and cleaning regime
- Hard-wearing with high abrasion resistance, suited to heavy-traffic engineering and warehouse environments
Limitations & considerations
- Very short pot life of about 15 minutes at 20°C demands experienced applicators and small, disciplined mix batches
- Three-component mortar must be mixed in full, correct proportions on site; part-mixing or re-tempering compromises cure and strength
- Requires a sound substrate of at least 25 MPa concrete, mechanical preparation and Nitoprime UR2 priming — it is not a cosmetic patch material
- Should be over-coated with Nitoflor HB300 U for full chemical resistance and colour stability; the cove mortar alone is not the finished surface
- Can yellow over time under UV or sustained heat, with lighter shades and blues most susceptible — a consideration where appearance is critical
- Application must not start below 5°C substrate/ambient and is best between 15–25°C with relative humidity under 90%
- Suited to professional installation as part of a flooring system, not to DIY or untrained labour
Selection & best practice
Treat the cove as a system detail, not an afterthought. Mechanically prepare the concrete (grind or captive-shot blast) to expose a sound, laitance-free surface of at least 25 MPa, confirm an effective damp-proof membrane on ground slabs, and prime with Nitoprime UR2 before the primer becomes touch-dry. Mix each batch fully and in correct proportions, and only mix what two people can trowel within the ~15-minute pot life at 20°C; in Indian summer conditions work in shaded, cooler hours because higher temperatures shorten that window further. Form the cove against a radius former to a consistent 25–50 mm profile, tie it into the floor while both are workable, and respect the overcoating window before applying Nitoflor HB300 U for colour and chemical resistance. Keep substrate and ambient temperatures at or above 5°C (ideally 15–25°C) through application and the tack-free period, and protect fresh coving from water and traffic until cured — about 8 hours to light traffic and 48 hours to full service at 20°C.
Specifications
| Product type | Three-component, trowel-applied polyurethane (PU) coving mortar |
| Finish | Matt, lightly textured |
| Coverage / yield | Approx. 1.8–2.0 kg of mixed material per m² per mm thickness |
| Pack size | 16.3 kg three-component pack |
| Typical cove radius | Approx. 25–50 mm (formed to project requirement) |
| Pot life | Approx. 15 minutes at 20°C |
| Light traffic / tack-free | Approx. 8 hours at 20°C |
| Full cure / full traffic | Approx. 48 hours at 20°C |
| Minimum substrate strength | 25 MPa compressive (28-day design) or >1.5 MPa surface tensile strength |
| Reference concrete grade | Minimum RC30 to BS 8500-2 (with DPM per CP102 on ground slabs) |
| Primer | Fosroc Nitoprime UR2 |
| Recommended topcoat | Fosroc Nitoflor HB300 U (for colour and chemical resistance) |
| Application temperature | Min 5°C; ideal 15–25°C; RH below 90% |
| Colour range | Blue, Buff, Dark Grey, Green, Mid Grey, Red, Yellow (Nitoflor range) |
| Suitable substrates | Concrete, polymer-modified screeds, granolithic concrete |
Industry use cases
Food & Beverage Processing
Forms HACCP-friendly radius coves at the floor-to-wall and floor-to-plinth junctions in processing and packing halls, so washdown water and debris cannot collect in square corners.
Dairy & Beverage Plants
Withstands lactic and citric acid exposure and frequent hot, wet cleaning around tanks, fillers and bottling lines, sealing the base of equipment and bund walls.
Pharmaceutical & Cleanrooms
Provides crevice-free, easily sanitised coved skirtings that support GMP cleanability in production suites, corridors and wet process areas.
Commercial Kitchens & Cold Stores
Creates durable, mop-and-hose-friendly cove skirtings in institutional kitchens, cold rooms and wet areas where hygiene and slip management are priorities.
Bunds, Tanked & Containment Areas
Details the internal angles of chemical bunds and tanked floors so spills are channelled and contained without a vulnerable square joint.
Heavy Engineering & Warehousing
Coves the perimeter of abrasion-resistant Nitoflor floors in engineering and logistics facilities subject to regular wet cleaning and heavy traffic.
Frequently asked questions
What is Fosroc Nitoflor Coving U used for?
Is Coving U a finished surface or does it need a topcoat?
What primer and substrate does it require?
How much Coving U do I need?
Why choose a PU coving over epoxy coving?
Does Space Arc supply and apply it in India?
How we position Fosroc Nitoflor Coving U
Within the Fosroc range, Nitoflor Coving U is the hygienic-detailing companion to the Nitoflor flooring family: it is specified alongside Nitoflor SL self-levelling floors and heavier PU screeds, primed with Nitoprime UR2 and finished with Nitoflor HB300 U, so the cove, floor and topcoat read as one colour-matched system. Where appearance or UV exposure is critical, Fosroc’s Coving UT variant or a pigmented PU topcoat may be preferred, since the U mortar can yellow over time. Against competitors, the closest equivalents are Sika’s PU-cement coving and Sikafloor cove detailing, MBCC/Master Builders Solutions (formerly MBS) Ucrete cove systems for the most aggressive thermal-shock and chemical duty, and resin cove details from STP Limited. For Indian projects, brands such as Dr. Fixit (Pidilite) are strong in waterproofing but less specialised in heavy-duty hygienic PU coving, so they are better seen as adjacent rather than direct alternatives. The honest position: Coving U is an excellent, well-proven hygienic cove for food, dairy and pharma floors when installed as part of a primed and topcoated Fosroc system by trained applicators — and Space Arc Engineering supplies and installs that complete system across Delhi NCR and Pan-India, advising specifiers on whether Coving U, Coving UT or a competing PU cove best fits the cleaning regime, temperature exposure and appearance the project requires.
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