Fosroc Nitocote BCS300
A CECRI-approved, multi-coat epoxy-polyurethane protective system delivering roughly 300 microns of chemical- and UV-resistant film on exposed concrete.
What is it?
A factory-engineered, four-product anti-corrosive coating system combining epoxy-polyamide build coats with an aliphatic polyurethane finish, approved by CECRI and giving a total dry film thickness of about 300 microns.
Where is it used?
Exposed concrete structures needing long-term chemical and UV protection, such as cooling towers, water-retaining structures, effluent and treatment plants, and industrial superstructures in power, oil and gas, marine and infrastructure projects.
Why use it?
It packages a balanced primer, intermediate, top and UV-stable finish coat into one specified system, so contractors get a predictable, durable, colour-stable barrier instead of mixing and matching incompatible coatings.
How is it applied?
After thorough surface preparation, the four coats (Nitocote EP50 primer, EP110 micaceous iron oxide intermediate, EP100 top coat and Dekguard PU finish) are applied in sequence by brush, roller or airless spray to build the specified 300 micron film.
About Fosroc Nitocote BCS300
Fosroc Nitocote BCS300 is not a single product but a complete, pre-engineered protective coating system for concrete that has to survive aggressive chemical exposure and sustained ultraviolet attack. It is described by Fosroc as a multi-coat, anti-corrosive epoxy and polyurethane system, approved by the Central Electrochemical Research Institute (CECRI), Karaikudi, and formulated to deliver a durable chemical- and UV-resistant coating with a total dry film thickness of approximately 300 microns. The ‘BCS’ designation reflects its role as a Building/Concrete Surface protective specification rather than a standalone tin off the shelf.
The system is built from four matched components, each contributing a specific function. Nitocote EP50, a two-component red-oxide epoxy-polyamide primer, is applied first at a wet film thickness of about 100 microns to wet out the concrete and establish adhesion. Nitocote EP110, a two-component micaceous iron oxide (MIO) intermediate coat based on epoxy-polyamide, follows at roughly 175 microns wet; the lamellar MIO pigment reinforces the film and improves barrier performance. Nitocote EP100, a two-component titanium-dioxide epoxy-polyamide top coat, is then applied at about 175 microns wet to build colour and chemical resistance. Finally, Dekguard PU, a two-component aliphatic polyurethane finish coat applied at around 110 microns wet, provides the gloss retention, weathering and ultraviolet stability that pure epoxies lack. The combination is what allows the system to stand up to both chemical service and direct sunlight without the chalking that affects unprotected epoxy.
For engineers and applicators in India, the practical appeal of Nitocote BCS300 is that it is specified as a system with a CECRI approval behind it, which carries weight in government, PSU and infrastructure tenders where independent validation of anti-corrosive performance is expected. Space Arc Engineering supplies the full BCS300 system, along with associated primers, thinners and Fosroc surface-preparation products, across Delhi NCR and Pan-India, and can support specification and applicator queries for project teams.
The technical insight
The intelligence in Nitocote BCS300 lies in how the four coats are sequenced to solve epoxy’s two classic weaknesses: substrate movement/permeability and UV degradation. Epoxy-polyamide chemistry gives outstanding chemical resistance and adhesion to concrete but chalks and yellows under sunlight; aliphatic polyurethane resists UV beautifully but is not the ideal primer for concrete. BCS300 stacks them so each does what it does best. The micaceous iron oxide intermediate is the technical heart of the build: its plate-like (lamellar) pigment orients parallel to the surface, lengthening the path that water, oxygen and ions must travel to reach the concrete and rebar, which raises the effective barrier rating well beyond what the nominal 300 micron thickness alone would suggest. The titanium-dioxide top coat adds opacity, colour and a second chemical-resistant layer, while the Dekguard PU finish caps the system with a UV-stable, gloss-retaining, cleanable surface. Because all four are two-component, reactive-cure materials from one manufacturer, intercoat compatibility and adhesion are engineered rather than assumed. The headline number to specify against is the total dry film thickness of roughly 300 microns; achieving it reliably depends on hitting each component’s wet film thickness, which in turn depends on disciplined surface preparation, correct mixing ratios and respecting the overcoating windows between coats.
Where it is used
- Anti-corrosive and chemical-resistant protection of exposed concrete in cooling towers and recirculating water structures
- Protective coating of water-retaining and water-treatment structures where chemical exposure is expected
- Coating of effluent treatment plant (ETP/STP) concrete subject to chemical and UV attack
- UV-stable protective finishing of external concrete superstructures in power and process plants
- Corrosion protection of concrete elements in oil and gas, petrochemical and fertiliser facilities
- Marine and coastal concrete exposed to chloride-laden, high-UV environments
- Protective coating of bridge, flyover and infrastructure concrete requiring colour-stable, durable finishes
- General industrial concrete surfaces needing a specified, CECRI-approved multi-coat barrier system
Key advantages
- CECRI-approved system, valuable for government, PSU and infrastructure specifications in India
- Combined chemical resistance and ultraviolet stability in one specified build, thanks to the epoxy build coats plus aliphatic PU finish
- Micaceous iron oxide intermediate coat delivers an enhanced barrier far beyond the nominal film thickness
- Total dry film thickness of about 300 microns gives substantial, durable protection on concrete
- Excellent adhesion to concrete substrates from the dedicated epoxy-polyamide primer
- Factory-matched four-coat system removes the risk of intercoat incompatibility
- Available in selected colours for finish and identification requirements
- Brush, roller or airless spray application suits both small repairs and large structures
Limitations & considerations
- A multi-coat system, so it requires sequencing of four products and respect for overcoating windows, which lengthens programme time versus a single-coat product
- Minimum application temperature of 15 C; jobs below 15 C or above 40 C need Fosroc technical guidance before proceeding
- Performance is highly dependent on surface preparation; oil, laitance, dust and moisture will undermine adhesion
- Formulated and specified primarily for concrete substrates rather than as a general-purpose steel coating system
- Two-component reactive materials have a limited pot life once mixed and a 12-month shelf life in unopened containers stored below 35 C
- Solvent-borne coats require adequate ventilation and PPE during application
- Colour range is limited to selected colours, not unlimited custom shades
- Final dry film thickness must be verified on site; under-application compromises the rated barrier performance
Selection & best practice
Treat BCS300 as a specification, not just a product. Begin with mechanical surface preparation of sound, fully cured concrete, removing laitance, curing compounds and contamination, and making good blowholes and defects with an appropriate Fosroc repair mortar. Confirm the substrate is dry and within the recommended application temperature (minimum 15 C); seek Fosroc advice for work below 15 C or above 40 C. Mix each two-component coat strictly to the stated ratio using a slow-speed mechanical stirrer, and apply Nitocote EP50, EP110, EP100 and Dekguard PU in the correct order, hitting each coat’s wet film thickness to build the full ~300 micron dry film. Respect the minimum and maximum overcoating intervals between coats so intercoat adhesion is not lost, and verify wet and dry film thickness with gauges during application. Store all four components in unopened containers below 35 C and use within the 12-month shelf life. For project-specific coverage, pot life, cure and overcoating data, always work from the current Fosroc India technical data sheet for the actual batch supplied.
Specifications
| Product type | Multi-coat anti-corrosive epoxy and polyurethane protective coating system |
| System components | Nitocote EP50 (primer), Nitocote EP110 (intermediate), Nitocote EP100 (top coat), Dekguard PU (finish) |
| Nitocote EP50 | Two-component red oxide epoxy-polyamide primer, ~100 microns wet film |
| Nitocote EP110 | Two-component micaceous iron oxide epoxy-polyamide intermediate coat, ~175 microns wet film |
| Nitocote EP100 | Two-component titanium dioxide epoxy-polyamide top coat, ~175 microns wet film |
| Dekguard PU | Two-component aliphatic polyurethane finish coat, ~110 microns wet film |
| Total dry film thickness | Approximately 300 microns |
| Approval | CECRI (Central Electrochemical Research Institute) approved |
| Key resistances | Chemical resistance and ultraviolet (UV) resistance |
| Substrate | Concrete |
| Minimum application temperature | 15 C (consult Fosroc below 15 C or above 40 C) |
| Application methods | Brush, roller or airless spray |
| Colours | Available in selected colours |
| Shelf life | 12 months in unopened containers stored below 35 C |
Industry use cases
Power generation
Anti-corrosive, UV-stable coating of cooling tower concrete and exposed superstructures in thermal and combined-cycle plants, where the CECRI approval supports PSU tender requirements.
Water and wastewater
Protection of concrete in water-retaining structures, effluent and sewage treatment plants subject to chemical attack, while resisting weathering on exposed surfaces.
Oil, gas and petrochemical
Corrosion protection of concrete structures in refineries, fertiliser and process plants exposed to aggressive chemicals and intense sunlight.
Marine and coastal
Durable, UV-resistant barrier on chloride-exposed concrete in jetties, coastal plants and waterfront infrastructure.
Infrastructure and transport
Colour-stable, long-life protective finishing of bridge, flyover and structural concrete requiring a specified multi-coat anti-corrosive system.
Frequently asked questions
Is Fosroc Nitocote BCS300 a single coating or a system?
What surfaces is BCS300 designed for?
Why does the system include a polyurethane finish over epoxy coats?
What dry film thickness does BCS300 achieve?
What is the minimum application temperature?
Does Space Arc supply BCS300 across India, and is it CECRI approved?
How we position Fosroc Nitocote BCS300
Within the Fosroc range, Nitocote BCS300 sits at the heavier, system-level end of protective coatings for concrete, alongside related products such as Nitocote EPS and Nitocote EPU (high-build epoxy and elastomeric solutions) and the Dekguard family of anti-carbonation and weather-resistant coatings, of which Dekguard PU is the finish coat here; for single-product chemical resistance many specifiers also reference Nitocote CM210. Against the wider Indian market, the BCS300 system competes with multi-coat anti-corrosive specifications from Sika (Sikagard and Sikalastic ranges), MBCC/Master Builders Solutions (MasterProtect/MasterSeal coatings), Dr. Fixit (Pidilite, for concrete protective and waterproof coatings) and STP Limited, each of which offers comparable epoxy and polyurethane protective systems. BCS300’s distinguishing feature is its CECRI approval and its packaging as a single, factory-matched four-coat specification, which simplifies compliance in government and PSU tenders. The honest position: where a project demands an independently approved, UV-stable, chemical-resistant concrete coating with a defined ~300 micron build, BCS300 is a strong, well-documented choice; where requirements are lighter, single-coat anti-carbonation products or competitor systems may be more economical, and the right selection should always be confirmed against the project’s exposure conditions and the current Fosroc India technical data sheet.
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