PPG SigmaShield 460 a two-component, high solids glass flake reinforced polyamine adduct epoxy coating for long-term protection at areas subject to heavy wear and tear, with very low water permeability, (due to glass flake barrier) and resistance to splash and spillage of a wide range of chemicals.

Features & Benefits

• Excellent abrasion and impact resistance
• Suitable for use on ice-going vessels
• Excellent resistance to corrosion
• Long-term protection at areas subject to heavy wear and tear
• Resistant to splash and spillage of a wide range of chemicals
• Very low water permeability, due to glass flake barrier
• Used by NCOC, the operator of the giant Kashagan offshore oilfield located in the northern part of the Caspian Sea, applied in a three-coat system with PPG SIGMACOVER 280 primer and the PPG SIGMADUR 520 polyurethane finish for all the main steel structures (frame, beams, columns etc.)
• Used by Utgrunden Offshore Wind Farm, Baltic Sea, protecting against seawater immersion, strong winds, breaking waves, ice formation

Other light colours can be made on request; contact our sales team on 0113 2455450 or [email protected] to discuss your requirements.

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

Substrate conditions

• Steel; blast cleaned to ISO-Sa2½, blasting profile 40 – 70 µm (1.6 – 2.8 mils)
• Previous coat must be dry and free from any contamination

IMO-MSC.215(82) requirements for water ballast tanks

• 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)

Substrate Temperature & 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

Application

Instructions for Use

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

• The temperature of the paint 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
• Very good mechanical mixing of base and hardener is essential
• Thinner should be added after mixing the components
• Filters should be removed from spray equipment

Induction time

• None

Air spray

Recommended thinner

• THINNER 91-92

Volume of thinner

• 5 - 10%, depending on required thickness and application conditions

Nozzle orifice

• 1.5 – 2.0 mm (approx. 0.060 – 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. 0.53 – 0.79 mm (0.021 – 0.031 in)

Nozzle pressure

• 19.0 - 22.5 MPa (approx. 190 - 225 bar; 2756 - 3264 p.s.i.)

Brush/roller

• Brush application only
• Only for touch-up and repair
• Due to thixotropy, it is difficult to obtain a smooth film by brush, although this does not affect performance

Cleaning Solvent

• THINNER 90-53

Spreading Rate and Film Thickness

Notes:

• Maximum DFT when brushing: 80 µm (3.1 mils)
• Maximum recommended dft for complex structures is 250 µm (10.0 mils)

Overcoating interval for DFT up to 400 µm (16.0 mils)

Curing time for DFT up to 400 µm (16.0 mils)

Notes:

• 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

• Conversion Tables (information sheet 1410)
• 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)
• Cleaning of Steel and Removal of Rust (information sheet 1490)
• Specification for Mineral Abrasives (information sheet 1491)
• Relative humidity - Substrate Temperature - Air Temperature (information sheet 1650)