Ressi EPO Shield – Offshore Mastic
Ressi EPO Shield – Offshore Mastic is a high-performance, two-component epoxy coating formulat
ed for steel substrates protected with anticorrosive primers in extreme corrosivity environments
(CX). It is designed for offshore, marine, and industrial structures exposed to the harshest conditions,
including constant salt spray, tropical humidity, chemical exposure, and industrial pollutants.
This topcoat provides superior chemical, UV, abrasion, and weather resistance, forming a tough,
smooth, and chemically resistant finish that enhances durability and maintains aesthetic appear
ance over anticorrosive primers
Ressi EPO Shield – Offshore Mastic
High-Performance Epoxy Topcoat for CX Extreme Corrosivity Environments
Ressi EPO Shield – Offshore Mastic is a high-performance, two-component epoxy coating
formulated for steel substrates protected with anticorrosive primers in
CX extreme corrosivity environments as defined in ISO 12944.
It is designed for offshore, marine, and heavy industrial structures exposed to the harshest
conditions including constant salt spray, tropical humidity, chemical exposure, and industrial pollutants.
This topcoat provides superior chemical, UV, abrasion, and weather resistance, forming a tough,
smooth, and chemically resistant finish that enhances durability and maintains aesthetic appearance
over anticorrosive primers in extremely aggressive environments.
TYPICAL APPLICATION
- Offshore platforms, jetties, and marine installations under severe conditions
- Chemical plants and storage tanks exposed to aggressive chemicals
- Coastal and tropical steel structures with constant high humidity
- Pipelines, pressure vessels, and industrial machinery in extreme environments
- Heavy-duty fabrication requiring maximum corrosion protection
- Maintenance coatings in highly aggressive CX environments
ADVANTAGES
- Designed for extreme CX corrosivity conditions beyond C5
- Excellent adhesion over epoxy primers for CX environments
- Maximum resistance to humidity, salinity, chemical exposure, and UV
- Smooth, durable, and highly aesthetic finish
- Tough, impact-, abrasion-, and chemical-resistant film
- Suitable for brush, roller, or spray application
SURFACE PREPARATION
- Apply only over fully cured epoxy primer suitable for CX environments
(minimum tack-free time: 4–6 hours, full cure: 7 days).
- Ensure primer surface is clean, dry, and free from dust, grease, or contaminants.
- Light sanding is recommended for glossy or aged primer surfaces to ensure proper adhesion.
MIXING
Ressi EPO Shield – Offshore Mastic is supplied in pre-measured two-component kits.
- Pour the entire contents of the Hardener (Part B) into the Base (Part A).
- Mix thoroughly using a low-speed mechanical mixer (300–400 rpm) until homogeneous.
- Avoid entrapping air during mixing.
APPLICATION
- Apply by airless spray, conventional spray, brush, or roller.
- Ensure uniform coverage and recommended dry film thickness (DFT).
- Recommended DFT per coat: 70–80 microns
- Number of coats: 2–3 depending on exposure severity
- Overcoating: Minimum 8 hours | Maximum 48 hours (light sanding if exceeded)
COVERAGE
Approximately 70–80 sq. ft. per kg per coat @ 80–100 microns.
Theoretical coverage values are provided for reference only; actual material consumption may vary
depending on surface profile, porosity, and application conditions.
LIMITATIONS
- When temperatures exceed 35°C, working times will be reduced significantly.
- During application in cold weather, correct conditioning is essential.
- Application should be halted if ambient or substrate temperature is likely to fall below 10°C.
TECHNICAL PROPERTIES
| Property | Value |
|---|
| Appearance | Opaque Liquid |
| Color | Available in Different Colors (Refer to Shade Card) |
| Viscosity (Part A) | 1000 – 2500 |
| Viscosity (Part B) | 300 – 600 |
| Mix Ratio (Part A : Part B) | 100 : 25 |
| Mix Viscosity @ 25°C | 600 – 800 cPs |
| Mix Density | 1.15 g/cc |
| Working Time | 90 – 120 minutes |
| Tack Free Time | 4 – 5 Hours |
| Over Coat Time | 8 – 12 Hours |
| Full Cure | 7 Days |
| Gloss | 100 – 120 (High) |
| Adhesion (ASTM D 3359) | 5B (Pass) |
| Pencil Hardness (ASTM D 3363) | 6H (Pass) |
| Mandrel Test (ASTM D 522) | 12mm (Pass) |
SHELF LIFE
12 Months from the date of manufacture when stored under warehouse conditions
in original unopened packaging. Extreme temperature or humidity may reduce shelf life.
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 the material to be flammable.
Do not reuse containers. Dispose packaging as per local regulations.
Gloves and suitable masks should be worn during application.
Refer to MSDS for further health and safety information.
