Ressi EPO Prime – Industrial Mastic

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.

1. Add the entire contents of Hardener (Part B) into Base (Part A).
2. Mix thoroughly using a low-speed mechanical mixer (300–400 rpm).
3. 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

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.