PPG - Sigmacover 350 - Epoxy Primer is a two-component, high build polyamide cured epoxy primer/coating for wide use in Marine and Protective Coatings.
Features
- Surface tolerant primer/coating for wide use in Marine and Protective Coatings.
- Marine use: suitable on topsides, decks, superstructures and cargo holds
- Excellent corrosion resistance
- Compatible with various aged coatings
- Suitable as floor coating for pedestrian traffic with dry to walk on time of 6 hours at 20°C (68°F)
- Good impact and abrasion resistance
- Smooth film, easy to clean
- Resistant to splash and spillage of a wide range of chemicals
Recommended Substrate Conditions and Temperatures
Substrate Conditions
- Steel; blast cleaned to ISO-Sa2½ for excellent corrosion protection, blasting profile 40 – 70 µm (1.6 – 2.8 mils)
- Steel; blast cleaned to ISO-Sa2, blasting profile 40 – 70 µm (1.6 – 2.8 mils) or power tool cleaned to minimum ISO-St2 for good corrosion protection
- Coated steel; hydrojetted to VIS WJ2/3L
- Surface must be dry and free from any contamination
- Existing sound epoxy systems and most sound alkyd coating system; sufficiently roughened
Substrate Conditions of Concrete for Thinned Version
- Dried for at least 28 days in good ventilation conditions
- Moisture content should not exceed 4.5%
- Concrete must be sound, dry, free from laitance and any contamination
- Rough surface; eventually abraded by power tool or diamond abrading tool
Coated Concrete
- Existing sound coating systems; sufficiently roughened, dry and cleaned
- To ensure compatibility, rub the existing coating with a cloth with Xylene or MEK for 10 seconds, and remove existing coatings if dissolving occurs
- Rough surface; eventually abraded by power tool or diamond abrading tool
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
Instructions For Use
Mixing ratio by volume: base to hardener 80:20 (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
- Thinner should be added after mixing the components
Application
Air spray
Recommended thinner
THINNER 91-92
Volume of thinner
5 - 10%, depending on required thickness and application conditions
Nozzle orifice
1.8 – 2.0 mm (approx. 0.070 – 0.079 in)
Nozzle pressure
0.3 - 0.4 MPa (approx. 3 - 4 bar; 44 - 58 p.s.i.)
Airless spray
Recommended thinner
THINNER 91-92
Volume of thinner
0 - 5%, depending on required thickness and application conditions
Nozzle orifice
Approx. 0.48 – 0.53 mm (0.019 – 0.021 in)
Nozzle pressure
15.0 MPa (approx. 150 bar; 2176 p.s.i.)
Brush/roller
Recommended thinner
THINNER 91-92
Volume of thinner
0 – 5%
Note: 10 - 15% when applied as a primer direct to concrete
Cleaning solvent
THINNER 90-53