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