Chemical Resistant Epoxy Coatings: How to Select the Right System
MR. JO Protectokot Range – Practical Selection Guide
Chemical exposure can vary significantly from one industrial facility to another. Floors, walls, tanks, bunds and concrete structures may come into contact with acids, alkalis, solvents, petroleum products, wastewater or seawater.
Choosing a chemical-resistant coating is therefore not simply about selecting the strongest epoxy. The right system depends on the type of chemical, concentration, temperature, exposure duration and service condition. The MR. JO Protectokot range offers different epoxy technologies for general industrial protection, solvent-rich environments, aggressive chemicals, vertical applications and immersion conditions.
Choosing the Right MR. JO Protectokot System
Standard high-build chemical-resistant coating for industrial floors, walls, steel and concrete where protection, appearance and ease of application are important.
Non-sag high-build system designed for vertical and overhead applications.
General chemical-resistant epoxy coating for broad industrial chemical exposure, including acids, alkalis, salts, oils and selected solvents.
Fast-setting chemical-resistant epoxy coating suited to solvent-rich and demanding industrial environments where rapid turnaround is important.
Novolac epoxy system designed for aggressive chemical environments and demanding tank or containment applications.
Coal-tar epoxy system for demanding waterproofing, wastewater, seawater, underground and immersion-related applications where a black finish is acceptable.
Which System Suits Which Chemical Exposure?
| Chemical / Exposure | Suitable Starting Point | Engineering Consideration |
| General industrial chemicals | HB / vHB / CR | Select according to exposure |
| Organic acids | CR | CR generally preferred |
| Mineral / inorganic acids | CSA / CRH | Review concentration and temperature |
| Strong alkalis | CRH | Novolac preferred for severe exposure |
| Alcohols | CSA / CRH | Review actual chemical exposure |
| Aromatic solvents | CSA | Particularly suitable for solvent-rich environments |
| Chlorinated hydrocarbons | CRH | CRH generally preferred |
| Petroleum products | HB / vHB / CR / CSA / CRH | Selection depends on exposure |
| Sea water | BLK | BLK preferred for immersion |
| Wastewater | BLK | Particularly suitable for aggressive wastewater exposure |
| Aggressive waterproofing | BLK / CRH | BLK preferred where black finish is acceptable |
Important: Chemical resistance can change with concentration, temperature, exposure time and chemical combinations. Always review the specific chemical exposure before final product selection.
Product Selection by Service Condition
General Industrial Chemical Exposure
For routine industrial chemical protection, MR. JO Protectokot CR provides a practical starting point for concrete, masonry and metal substrates with appropriate preparation and priming.
Vertical & Overhead Surfaces
Where the coating must remain stable on vertical or overhead surfaces, MR. JO Protectokot vHB is positioned as the non-sag high-build option.
Solvent-Rich Environments
For areas exposed to solvents, acids and aggressive industrial chemicals, MR. JO Protectokot CSA is particularly suitable. Its fast-setting characteristics can support projects where quicker turnaround is important.
Aggressive Chemical Environments
Where chemical exposure is more severe, MR. JO Protectokot CRH provides a Novolac-based solution designed for demanding chemical protection and tank-lining applications.
Marine, Wastewater & Immersion Applications
For seawater, wastewater, underground structures and aggressive waterproofing where a black finish is acceptable, MR. JO Protectokot BLK is the preferred starting point.
Typical Industrial Applications
Industrial floors, chemical-resistant walls, bund walls, battery rooms, chemical storage areas, solvent-handling zones, food-processing areas, pharmaceutical process areas, chemical manufacturing facilities, tank exteriors and interiors, marine structures, jetties, ETP/STP areas, underground concrete structures, buried pipelines and seawater intake structures.
The product should always be selected according to the actual operating environment and chemical exposure.
Building a Complete Chemical Resistant Flooring System
A chemical-resistant coating should not be treated as an isolated topcoat. Long-term performance depends on the complete flooring or protection system.
Typical construction: Surface Preparation → Repairs → Primer → Chemical-Resistant Underlay/Screed (where required) → Selected Protectokot Coating
Primer: New concrete – primer as specified. Existing, difficult or moisture-affected concrete – MR. JO Bondkot UPS can be considered as a moisture-tolerant bonding layer.
Chemical-Resistant Underlay: Where additional thickness, levelling or chemical resistance is required, MR. JO Underlay CMR provides a chemical-resistant epoxy screed solution.
Why the Complete System Matters
Proper surface preparation, sound and repaired concrete, correct primer selection, suitable underlay or screed, correct coating thickness, proper mixing and application, and adequate curing before chemical exposure all contribute to long-term performance.
Important Engineering Considerations
Product selection should be based on the actual service environment rather than ranking one chemistry as universally better. Consider chemical type, concentration, temperature, exposure duration, splash or spill exposure, immersion, mechanical loading, UV exposure and required thickness. Pigmented coatings can improve appearance and inspection, while certain chemicals may alter colour without necessarily indicating coating failure. Epoxy provides excellent chemical protection but should not be selected where long-term UV colour retention is the primary requirement.
The Right Chemical Resistant Floor Is an Engineered System
There is no single Protectokot product designed for every chemical environment. HB is positioned for general high-build industrial protection; vHB for vertical and overhead applications; CR for broad industrial chemical protection; CSA for solvent-rich and fast-turnaround applications; CRH for aggressive chemical environments; and BLK for demanding waterproofing, marine, wastewater and immersion-related applications.
The correct choice depends on the actual service environment, not simply on the name of the chemical or the thickness of the coating.
Ask Mr. JO
Every chemical-resistant flooring and protective coating project has different requirements. The MR. JO technical team can help evaluate the substrate, chemical exposure, service conditions and required flooring build-up to develop a suitable protection system.
Choose the system based on what your floor is expected to face—not simply on the product name.
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