PPG SigmaShield 880GF, also known as Amerlock 880GF, is a two-component, surface tolerant high solid glass flake epoxy coating designed for use in heavy-duty and corrosive environments for offshore splash zone maintenance.

SigmaShield 880GF has outstanding sea water resistance and continues to cure when immersed in water. Long-term protection in a single-coat application and excellent corrosion resistance are suitable for application on the exterior of buried pipes, jetties, piling, etc.

Features & Benefits

• Primarily designed for use in offshore splash zone maintenance
• Designed for use in heavy-duty and corrosive environments
• Outstanding sea water resistance
• Excellent corrosion resistance
• Enhanced impact and abrasion resistance
• 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)

Note:

Epoxy coatings will characteristically chalk and fade upon exposure to sunlight. Note that product tinted to customer colours cannot be used as primer or intermediate layer in a multicoat system, only use factory grind batches. Tinted colours can be used only as last layer in a multicoat system.

Product Data

Notes:

• Refer below for more details on spreading rate and film thickness, overcoating intervals and curing times

Surface Preparation

Recommended Substrate Conditions and Temperatures

• Coating performance will depend upon the surface preparation degree
• Steel; blast cleaned to ISO-Sa2 or ISO-Sa2½
• Blasting profile of 40 – 80 µm (1.6 – 3.1 mils) is recommended
• Steel; hand/power tool clean in accordance with St3 or SSPC-SP3 for new building and St2 or SSPC-SP2 for maintenance, UHPWH in accordance with WJ2L/3l (SSPC-VIS-4)
• Compatible previous coat must be dry and free from any contamination

Substrate Temperature & Application Conditions

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

Application

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

Induction time

• None

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

Only for touch-up and spot repair

Recommended thinner

• THINNER 91-92

Volume of thinner

• 0 – 5%

Cleaning Solvent

• THINNER 90-53

Spreading Rate and Film Thickness

Overcoating interval for DFT up to 500 µm (20.0 mils)

Note: Surface should be dry and free from any contamination

Curing time for DFT up to 500 µm (20 mils)

Notes:

• The curing time is related to the DFT of the paint and ventilation of the drying condition. High DFT and poor ventilation will slow curing
• Premature exposure to water will lead to whitening of dark colours when applied between tides on jetties, piling etc. this will not affect anticorrosive properties of the coating
• Adequate ventilation must be maintained during application and curing (please refer to information sheets information sheet 1433 and information sheet 1434

Pot Life (at application viscosity)

Safety Precautions

• This is a solvent-borne paint and care should be taken to avoid inhalation of spray mist or vapour, as well as contact between the wet paint and exposed skin or eyes

References

• Explanation to product data sheets (information sheet 1411)
• Safety Indicators (information sheet 1430)
• Safety in Confined Space and Health Safety, Explosion Hazard - Toxic Hazard (information sheet 1431)
• Safe Working in Confined Spaces (information sheet 1433)
• Directives for Ventilation Practice (information sheet 1434)