PPG SigmaCover 380 – Universal Pure Epoxy Anticorrosive Primer

PPG SigmaCover 380 is a high-performance universal epoxy primer formulated with pure epoxy technology to deliver robust anticorrosive protection across a wide range of marine and industrial environments. Engineered for both newbuild and maintenance, it offers excellent durability, flexibility, water resistance, and long-term performance, even under immersion.

Ideal for use on ballast tanks, decks, topsides, superstructures and hulls, SigmaCover 380 provides strong adhesion, reliable curing, and outstanding resistance to abrasion and cathodic protection systems. Its versatility and dependable corrosion protection make it a trusted choice for aggressive service conditions.

Key Features:

• Universal pure epoxy anticorrosive primer

• Suitable for ballast tanks, decks, topsides, superstructures & hulls

• Excellent abrasion resistance for demanding environments

• Suitable for immersion service (ballast tanks & outer shell)

• Strong anticorrosive performance with superior water resistance

• Flexible and durable formulation

• Compatible with well-designed cathodic protection systems

• Reliable drying and curing properties

• Suitable for both new construction and maintenance projects

Surface Preparation

Immersion exposure
• Steel or steel with not appoved zinc silicate shop primer: blast cleaned to ISO-Sa2½, blasting profile 30 - 75 µm (1.2
– 3.0 mils)
• Steel with approved zinc silicate shop primer; weld seams and areas of damaged shop primer or breakdown should
be blast cleaned to ISO-Sa2½, blasting profile 30 - 75 µm (1.2 – 3.0 mils) or power tool cleaned to SPSS-Pt3
• Coated steel; hydrojetted to VIS WJ2L (blasting profile 30 – 75 µm (1.2 – 3.0 mils))
• Previous coat must be dry and free from any contamination
IMO-MSC.215(82) requirements for water ballast tanks
• Steel; ISO 8501-3: 2006 grade P2, with all edges treated to a rounded radius of minimum 2 mm (0.0789 in) or
subject to three pass grinding
• Steel or steel with not appoved zinc silicate shop primer: blast cleaned to ISO-Sa2½, blasting profile 30 - 75 µm (1.2
– 3.0 mils)
• Steel with approved zinc silicate shop primer; weld seams and areas of shop primer damage or break down should
be blast cleaned to ISO-Sa2½ blasting profile 30 – 75 µm (1.2 – 3.0 mils): [1] For shop primer with IMO type approval;
no additional requirements; [2] For shop primer without IMO type approval; blast cleaned to ISO-Sa2 removing at
least 70% of intact shop primer, blasting profile 30 – 75 µm (1.2 – 3.0 mils)
• Damages up to 2% of the total area of the tank may be treated to ISO-St3. Damages over 2% of the total area of
the tank or contiguous damages over 25 m² (269 ft²) have to be blast cleaned to ISO-Sa2½.
• Dust quantity rating "1 for dust size class "3", "4" or "5", lower dust size classes to be removed if visible on the
surface to be coated without magnification (ISO 8502-3:1992)
• Previous coat must be dry and free from any contamination
Atmospheric exposure conditions
• Steel; pretreated preferably to ISO-Sa2½, , blasting profile 30 – 75 µm (1.2 – 3.0 mils) or according to ISO-St3
• Shop primed steel; pretreated to SPSS-Pt3
• Galvanized steel must be free from grease, salts and any contamination
• Galvanized steel must be sweep blasted or otherwise roughened
• Coated steel; hydrojetted to VIS WJ2L (blasting profile 30 – 75 µm (1.2 – 3.0 mils))
• Previous coat must be dry and free from any contamination
Substrate temperature and application conditions
• Substrate temperature during application and curing should be above 5°C (41°F)
• Substrate temperature during application and curing should be at least 3°C (5°F) above dew point
• Relative humidity during application and curing should not exceed 85%

Technical Data

Pot life
4 hours at 20°C (68°F)
Note:
- See ADDITIONAL DATA – Pot life

Spreading rate and film thickness
DFT Theoretical spreading rate
125 µm (5.0 mils) 6.4 m²/l (257 ft²/US gal)
160 µm (6.3 mils) 5.0 m²/l (204 ft²/US gal)
200 µm (8.0 mils) 4.0 m²/l (160 ft²/US gal)

Directions for Use

INSTRUCTIONS FOR USE
Mixing ratio by volume: base to hardener 4:1
• The temperature of the mixed base and hardener should preferably be above 15°C (59°F), otherwise extra thinner
may be required to obtain application viscosity
• Adding too much thinner results in reduced sag resistance and slower cure
• Thinner should be added after mixing the components

Airless spray
Recommended thinner
THINNER 91-92
Volume of thinner
0 - 10%, depending on required thickness and application conditions
Nozzle orifice
Approx. 0.46 – 0.53 mm (0.018 – 0.021 in)
Nozzle pressure
20.0 - 25.0 MPa (approx. 200 - 250 bar; 2901 - 3626 p.s.i.)

Brush/roller
• Brush: for stripe coating and spot repair only

Cleaning solvent
• THINNER 90-53

Data Sheets

SigmaCover 380 TDS

SigmaCover 380 Base MSDS

SigmaCover 380 Hardener MSDS