Ressi EPO Prime – Industrial Mastic
Ressi EPO Prime Industrial Mastic is a high-performance epoxy primer developed for industrial structures exposed to abrasion, moisture, and corrosive chemicals. Its advanced mastic formulation provides excellent adhesion on steel, concrete, and previously coated surfaces, ensuring dependable long-term protection in harsh operating environments. Designed for factories, warehouses, pipelines, and processing plants, this industrial epoxy coating offers superior surface penetration and resistance to industrial contaminants. Ressi EPO Prime Industrial Mastic helps extend asset life while minimizing maintenance requirements. Its durable high-build properties make it suitable for demanding industrial maintenance and protective coating applications.
Ressi EPO Prime – Industrial Mastic
Anticorrosive Epoxy Primer for C4 High Corrosivity Environments
Ressi EPO Prime – Industrial Mastic is a high-performance, two-component anticorrosive epoxy
primer specially formulated for C4 high corrosivity environments as defined in
ISO 12944. It is designed for protection of steel structures exposed to high humidity,
industrial pollution, and coastal or offshore conditions.
This primer contains active anticorrosive pigments and functional additives that barrier
performance and prevent rust formation even under harsh industrial, coastal, or marine conditions.
Once cured, it forms a tough, chemically resistant film, providing a strong foundation for
intermediate and topcoat layers.
TYPICAL APPLICATION
- Structural steel frameworks in industrial plants
- Marine and offshore structures
- Storage tanks and pipelines in chemical industries
- Power plants, refineries, and coastal installations
- Heavy machinery and industrial equipment
- General fabrication and maintenance coatings in C4 environments
ADVANTAGES
- Formulated for C4 high corrosivity environments (ISO 12944 compliant)
- Excellent adhesion to properly prepared steel substrates
- High resistance to humidity, salinity, and industrial pollution
- Contains active anticorrosive pigments for long-term protection
- Cures to a tough, chemically resistant film
- Provides an ideal base for intermediate and topcoat systems
- Easy to apply by brush, roller, or spray
SURFACE PREPARATION
- All surfaces must be clean, dry, and free from oil, grease, rust, mill scale, and contaminants.
- For optimal results, abrasive blast cleaning to Sa 2½ (ISO 8501-1) is recommended.
- If blasting is not possible, mechanical cleaning to St 3 standard may be used.
- Ensure surface is dust-free and dry prior to application.
MIXING
Ressi EPO Prime – Industrial Mastic is supplied in pre-measured two-component kits.
- Add the entire contents of Hardener (Part B) into Base (Part A).
- Mix thoroughly using a low-speed mechanical mixer (300–400 rpm).
- Avoid entrapping air during mixing.
APPLICATION
- Apply using airless spray, conventional spray, brush, or roller.
- Ensure uniform film thickness and full coverage.
- Recommended Dry Film Thickness (DFT): 80–100 microns per coat
- Apply subsequent coats once primer is dry to touch.
COVERAGE
Approximately 70–80 sq. ft. per kg per coat @ 80–100 microns.
Theoretical coverage values are for reference only.
LIMITATIONS
- When temperature exceeds 35°C, working time is reduced.
- Correct conditioning is required during cold weather.
- Do not apply if substrate temperature falls below 10°C.
TECHNICAL PROPERTIES
| Property | Value |
|---|
| Appearance | Opaque Liquid |
| Color | Red |
| Viscosity (Part A) | 600 – 1000 |
| Viscosity (Part B) | 100 – 150 |
| Mix Ratio (A : B) | 100 : 25 |
| Mix Viscosity @ 25°C | 200 – 400 cPs |
| Mix Density | 1.10 g/cc |
| Working Time | 90 – 120 minutes |
| Tack Free Time | 4 – 5 Hours |
| Over Coat Time | 8 – 12 Hours |
| Full Cure | 7 Days |
| Adhesion (ASTM D 3359) | 5B (Pass) |
| Pencil Hardness (ASTM D 3363) | 6H (Pass) |
| Mandrel Test (ASTM D 522) | 6mm (Pass) |
| Impact Resistance (ASTM D 2794) | >60 inch-lb |
SHELF LIFE
12 Months from date of manufacture when stored in original unopened packaging.
PACK SIZE
- 1 KG: Part A 800g | Part B 200g
- 5 KG: Part A 4 KG | Part B 1 KG
- 20 KG: Part A 16 KG | Part B 4 KG
HEALTH AND SAFETY
The packed material is regarded as non-hazardous for transportation. Once opened, extreme
temperatures may cause flammability. Dispose packaging as per local regulations.
Gloves and suitable masks are recommended. Refer to MSDS for detailed safety information.
