PPG - Sigmashield 880 is a two-component, high-build polyamine adduct cured epoxy coating, primarily designed for use in offshore splashzone maintenance.

Features

• Primarily designed for use in offshore splash zone maintenance
• Outstanding sea water resistance
• Excellent corrosion resistance
• Surface tolerant and abrasion resistant
• Continues to cure when immersed in water
• Long-term protection in a single-coat application
• Resistant to well designed cathodic protection
• Suitable for application on exterior of buried pipes
• Suitable on wet blast or ultra high pressure water (UHPWW) cleaned substrates (damp or dry)

Recommended Substrate Conditions and Temperatures

Substrate conditions

• Coating performance will depend upon the surface preparation degree
• For atmospheric service, abrasive blast to ISO-Sa2½ or minimum SSPC SP-6, power tool cleaned to ISO-St3 (SSPC SP-3)
  or hand tool cleaned to ISO-St2 (SSPC SP-2) or ultra high pressure water jet to SSPC SP WJ-2(L) / NACE WJ-2(L)
• For immersion service: steel; blast cleaned to ISO-Sa2½ (SSPC SP-10), blasting profile 40 – 75 µm (1.6 – 3.0 mils)
• Higher profiles (>75 microns, 3.0 mils) is allowable with appropriate coating thickness
• Compatible previous coat must be dry and free from any contamination

Note: Coating performance is, in general, proportional to the degree of surface preparation.

Substrate temperature and application conditions

• Substrate temperature during application should be at least 3°C (5°F) above dew point

Instructions For Use

Mixing ratio by volume: base to hardener 75:25 (3:1)

• Thinner should be added after mixing the components
• Do not thin more than is required by appropriate application property
• Adding too much thinner results in reduced sag resistance and slower cure

Air spray

Recommended thinner

THINNER 91-92

Volume of thinner

4 - 8%, depending on required thickness and application conditions

Nozzle orifice

1.5 – 3.0 mm (approx. 0.060 – 0.110 in)

Nozzle pressure

0.2 - 0.4 MPa (approx. 2 - 4 bar; 29 - 58 p.s.i.)

Airless spray

Recommended thinner

THINNER 91-92

Volume of thinner

0 - 8%, depending on required thickness and application conditions

Nozzle orifice

Approx. 0.53 – 0.69 mm (0.021 – 0.027 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%

Cleaning solvent

THINNER 90-53