Fosroc Nitoprime 88
Single-component cementitious anti-corrosion primer that protects exposed steel reinforcement and bonds the repair mortar in concrete rehabilitation work.
What is it?
A ready-to-use, single-component cementitious primer that coats exposed steel reinforcement to protect it against corrosion and create a bond bridge between the rebar and the repair concrete or mortar. It carries corrosion inhibitors, making it well suited to aggressive coastal and marine exposure.
Where is it used?
Applied in concrete repair and rehabilitation work to cleaned, exposed reinforcing bars before patch repair mortar is placed – bridges, jetties, water-retaining structures, basements, balconies and facades across Delhi NCR and Pan-India.
Why use it?
It is cement-based, so it shares the same chemical nature as the surrounding concrete, giving long-term compatibility, easy application from small packs, and dependable adhesion to both steel and the repair mortar without epoxy intercoat-timing constraints.
How is it applied?
Cleaned rebar is primed by brush; the cementitious slurry is applied to coat the steel, allowed to cure, and the polymer-modified or cementitious repair mortar is then placed over it within the repair system at a coverage of about 2.0 kg/m2 per mm of thickness.
About Fosroc Nitoprime 88
Fosroc Nitoprime 88 is a single-component, cementitious anti-corrosion primer formulated for the protection of exposed steel reinforcement during concrete refurbishment and repair. When a reinforced concrete element spalls or cracks, the embedded steel loses the high-alkalinity (high-pH) passive environment that normally protects it. Once exposed to moisture, oxygen and chlorides, the rebar begins to corrode, and the expanding rust drives further cracking. Nitoprime 88 is the priming layer in the repair sequence that re-establishes protection on that bar before new mortar goes back on. Because it is a cementitious material rather than an epoxy or zinc-rich coating, it shares the same nature as the parent concrete – a deliberate design choice that gives it excellent long-term compatibility with both the steel and the cementitious repair mortar placed over it. The product carries corrosion inhibitors that make it particularly valuable in coastal areas, maritime ports and other chloride-laden environments where reinforcement corrosion is the dominant deterioration mechanism. For an Indian distributor like Space Arc Engineering, Nitoprime 88 fits the international Fosroc Renderoc / Nitomortar concrete-repair family as the reinforcement-priming step, and is relevant wherever a contractor wants a cement-based primer instead of an epoxy or zinc-rich product. It is supplied in small, easy-to-handle packs and applied by brush, which suits the spot-repair, patch-by-patch nature of refurbishment work. Note: Nitoprime 88 is primarily catalogued on Fosroc’s international (EMEA/European) range; buyers should confirm current India SKU availability and the latest regional Technical Data Sheet with Space Arc before specifying it, and treat the cementitious zinc-free Nitozinc Primer / Nitoprime Zincrich variants as the closer India-stocked equivalents where 88 is not regionally listed.
The technical insight
The core engineering logic of Nitoprime 88 is matched-material chemistry. Most rebar primers fall into two families: epoxy/zinc-rich coatings that form a barrier or sacrificial film, and cementitious inhibited slurries that re-alkalise and re-passivate the steel. Nitoprime 88 belongs to the second family. By delivering a high-pH cementitious layer directly onto the cleaned bar, it restores a passivating alkaline film around the steel, while the incorporated corrosion inhibitors add a second line of defence against chloride attack. Because the cured primer is itself a cement matrix, it is fully compatible with – and bonds monolithically to – the cementitious repair mortar placed over it, avoiding the intercoat-adhesion and overcoat-window discipline that epoxy primers demand on site. This single-component, just-add-nothing format also reduces mixing error in the field. The trade-off is that a cementitious inhibited primer relies on thorough surface preparation (the steel must be cleaned to remove all rust and loose scale) and on the repair mortar being placed while the system is still able to bond; it does not provide the heavy sacrificial-cathodic protection that a zinc-rich epoxy gives where galvanic action is specifically required.
Where it is used
- Priming exposed steel reinforcement before patch repair of spalled or carbonated concrete
- Marine and coastal structures – jetties, sea walls, harbour and port concrete exposed to chlorides
- Water-retaining and water-excluding structures such as reservoirs, tanks and basements
- Bridge and flyover repairs where rebar has corroded and concrete cover has cracked
- Building facade, balcony, chajja, parapet and column repairs in high-humidity Indian coastal cities
- As the reinforcement-protection step within a cementitious concrete-repair system using compatible repair mortars
Key advantages
- Cementitious – same nature as the parent concrete, giving long-term material compatibility
- Single component and ready to use, minimising on-site mixing error
- Contains corrosion inhibitors, well suited to coastal and maritime chloride exposure
- Very good adhesion to both steel reinforcement and the concrete or repair mortar
- Re-establishes a high-alkalinity passivating environment around cleaned steel
- Supplied in small, easy-to-handle packs suited to patch and spot repairs
- Bonds monolithically to cementitious repair mortars without epoxy overcoat-window constraints
Limitations & considerations
- Requires thorough surface preparation – all rust, scale and loose material must be removed from the steel before priming
- Does not provide the heavy sacrificial/cathodic galvanic protection of a zinc-rich epoxy primer
- As a cementitious system, performance depends on the repair mortar being placed within the system’s working sequence
- Best used within a complete, compatible cementitious repair system rather than as a stand-alone permanent coating
- Detailed application parameters (coats, drying/overcoat times, pack sizes) vary by region – confirm against the current local TDS
- Primarily listed on Fosroc’s international range; India SKU availability should be verified before specifying
Selection & best practice
Always begin with surface preparation: break back the concrete to fully expose the corroded steel, then clean the reinforcement (wire brushing, grit blasting or equivalent) to remove all rust and loose scale on all faces of the bar, including the back. Apply Nitoprime 88 by brush as a complete, continuous coat over the cleaned steel, working it well into the surface; on heavily pitted bars a second coat may be warranted. Allow the primer to cure as directed before placing the repair mortar, and ensure the chosen repair mortar is from a compatible cementitious system. For best results in aggressive chloride environments, combine the primed repair with a protective anti-carbonation or anti-chloride coating over the completed concrete. Do not apply over contaminated, oily or still-rusty steel, and confirm pack quantities, coverage and curing details against the current regional Technical Data Sheet supplied by Space Arc Engineering before starting work.
Specifications
| Product type | Single-component cementitious anti-corrosion primer for steel reinforcement |
| Base chemistry | Cementitious, with corrosion inhibitors |
| Primary function | Corrosion protection of rebar + bond between reinforcement and concrete/mortar |
| Coverage | Approx. 2.0 kg/m2 per mm of thickness |
| Application method | Brush-applied to cleaned, exposed reinforcement |
| Components | Single component (ready to use) |
| Particularly suited to | Coastal areas and maritime / port environments (chloride exposure) |
| Position in system | Reinforcement-priming step within a cementitious concrete-repair system |
Industry use cases
Marine & Ports
Repair of chloride-attacked reinforced concrete in jetties, quays and harbour structures, where the inhibited cementitious primer re-protects exposed bars before patch mortar is placed.
Bridges & Infrastructure
Priming corroded reinforcement during patch repair of spalled bridge soffits, piers and crash barriers as part of a structured rehabilitation programme.
Water-Retaining Structures
Protecting steel in reservoirs, water tanks, STPs and basements where cementitious compatibility with the repair matrix is preferred over epoxy systems.
Buildings & Facades
Spot repair of corroded rebar in balconies, chajjas, parapets, columns and beams of ageing buildings in humid and coastal Indian cities.
Frequently asked questions
What is Fosroc Nitoprime 88 used for?
Is Nitoprime 88 cementitious or epoxy-based?
What is the coverage of Nitoprime 88?
Why is it suitable for coastal and marine structures?
How does Nitoprime 88 compare with Nitozinc Primer or zinc-rich primers?
Is Nitoprime 88 available in India through Space Arc Engineering?
How we position Fosroc Nitoprime 88
Nitoprime 88 sits in Fosroc’s concrete repair and rehabilitation system as the cementitious reinforcement-priming step, working ahead of repair mortars such as the Renderoc and Nitomortar ranges and finished with Fosroc protective anti-carbonation coatings (e.g. Dekguard). Within the Fosroc family its main siblings are the zinc-rich primers Nitozinc Primer and Nitoprime Zincrich / Zincrich Plus – choose Nitoprime 88 when cementitious compatibility and corrosion-inhibitor protection are wanted, and the zinc-rich options when active galvanic (sacrificial) protection is specified. Against competitors, the equivalent rebar primers are Sika’s MonoTop / Sika FerroGard reinforcement primers, MBS Saveguard repair primers, Dr. Fixit Steelprime, and STP’s reinforcement corrosion-inhibiting primers. Honest guidance from Space Arc: specify a cementitious inhibited primer like Nitoprime 88 inside a fully compatible cement-based repair system; where a project mandates zinc-rich galvanic protection or where 88 is not regionally stocked, switch to the appropriate Fosroc zinc-rich variant or an equivalent from the brands above, and always pair the repair with a surface protective coating in chloride-rich coastal exposure.
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