PPG SIGMASHIELD 905 Solvent-free Glass Flake Epoxy Coating 905

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Key properties

• Suitable for ships and offshore engineering
• Single-coat protective system for cargo holds, with excellent anti-corrosion performance.
• Excellent impact and abrasion resistance, particularly suitable for the carriage of hard, angular cargo
• Good resistance to a wide range of chemicals
• Light, conspicuous colour, easy to identify.
• Reduces explosion risk and fire hazard
• A heavy-duty single-component high-pressure airless spray pump (60:1) may be used
• Suitable for fully immersed, non-immersed or intermittently immersed areas, such as splash zones and decks

Colour and gloss

• Green
• Gloss

Basic data at 20 °C (68 °F)

Parameters after mixing

Maximum 141.0 g/L (approx. 1.2 lb/gal) (theoretical calculated value)

Maximum: 20 days

Curing agent: at least 24 months; store in a dry and cool environment

Notes

• See the supplementary data sheet — theoretical spreading rate versus dry film thickness table
• See supplementary parameters — recoat interval table
• See supplementary parameters table — curing time table

Recommended substrate condition and temperature

Dry cargo holds

• Bare steel: abrasive blast clean to Sa 2½ (ISO 8501-1), with surface roughness 50–100 µm (2.0–4.0 mils)
• The substrate surface must be clean, dry and free of all contaminants.

Immersion environment

• Bare steel: abrasive blast clean to Sa 2½ (ISO 8501-1), with surface roughness 50–100 µm (2.0–4.0 mils)
• The substrate surface must be clean, dry and free of all contaminants.
• Coated steel surfaces; high-pressure water jetting to VIS WJ2/3 L (restoring the original blast-cleaned surface profile of 50–100 µm)

Substrate temperature and application conditions

• During application and curing, the substrate temperature must be above 10 °C (50 °F)
• During application and curing, the substrate temperature must be at least 3 °C (5 °F) above the dew point

Coating system specification

• Coating system for dry cargo holds — system sheet SYSTEM SHEET 3107

Instructions for use

Mixing ratio by volume: base : curing agent = 80 : 20

• Before application, adjust the temperature of the base, curing agent or mixed paint to at least 20 °C (68 °F)
• At low temperatures, spraying may be difficult because of high paint viscosity.
• Do not add thinner

Induction Time

Not required

Airless spray (single-feed pump)

• A heavy-duty single-component high-pressure airless spray pump with a 60:1 pressure ratio, fitted with a suitable length of high-pressure hose
• For low-temperature application, use heated or insulated hoses to prevent the paint from thickening in the lines.
• Application may be carried out with a standard high-pressure airless spray pump with a pressure ratio of 45:1, but a high-pressure hose with external heating capability shall be used. When a single-component pump with a pressure ratio of 45:1 is selected

for high-pressure airless spray application, the paint in the hose shall be heated to approximately 30°C (86°F) to adjust its viscosity to a condition suitable for application.

• Keep hoses as short as possible

Nozzle tip size

Approx. 0.53 mm (0.021 in)

Note: when applying with a 45:1 single-component spray pump, heat the paint in the hose to about 30 °C (86 °F) so that the viscosity is adjusted to a state suitable for application.

Brush/roller

• For local small-area repair and manual touch-up only

Notes

• All application equipment must be cleaned immediately after use
• Paint remaining in spray equipment must be fully discharged within its pot life.

Supplementary parameters

Film thickness and spreading rate

Note: maximum dry film thickness for brush application: 200 µm (8.0 mil)

Wet film thickness measurement

• On site, differences often occur between measured WFT readings and the true film thickness, because of the thixotropic nature and surface tension of the paint, and the escape of air entrapped in the paint

being retarded; the air usually remains in the wet film for a while, temporarily occupying part of the coating volume.

• It is recommended to control the wet film thickness at the rated dry film thickness plus 60 µm (2.4 mil) during application

Dry film thickness measurement

• Because the coating has low initial cure hardness, a film thickness gauge probe sinks into the film and gives inaccurate readings if dry film thickness is measured in the first few days.
• When measuring dry film thickness, place a calibration shim of known thickness over the coating at the test point, then gently press the gauge probe onto the shim to measure the film thickness through it.
• If required, the specified dry film thickness may be set within the range 500–1000 µm (20.0–40.0). For specified dry film thickness values of 500 µm and above

in the coating, particular attention and care are required during application to prevent sagging and ensure a uniform film, for example by multiple passes. For complex structures or poor application conditions, multiple passes may be necessary to achieve a dry film thickness of 400–500 µm (16.0–40.0 mil).

Recoat interval table for a coating at 500 µm (20.0 mils) dry film thickness

Curing time table for a coating at 500 µm (20 mils) dry film thickness

Note: ensure continuous, adequate ventilation during application and curing (see Safety Sheet 1433 and Information Sheet 1434). Pot life after mixing (at suitable application viscosity)

Safety Precautions

• For the coating and its recommended thinners, see Safety Sheets 1430 and 1431 and the relevant Material Safety Data Sheet
• Although solvent-free, the coating must be handled with care; avoid inhaling spray mist and contact of uncured paint with skin and eyes.
• In confined spaces, provide adequate ventilation to maintain good visibility.

Worldwide

Although PPG Protective and Marine Coatings is committed to providing completely consistent products to users worldwide, from time to time it may be necessary to make minor adjustments to specific products to comply with local/national regulations or environmental requirements. In the following cases, use the corresponding alternative version of the product data sheet instead.

Reference information

• For the conversion table, refer to Information Sheet 1410
• For product data, refer to Information Sheet 1411
• For safety guidance, refer to Information Sheet 1430
• Safety and health in confined spaces | explosion hazard — toxic hazard: refer to Information Sheet 1431
• For safe working in confined spaces, refer to Information Sheet 1433
• For ventilation guidance, refer to Information Sheet 1434
• For steel surface preparation, refer to Information Sheet 1490
• For mineral abrasive specifications, refer to Information Sheet 1491
• For relative humidity, substrate temperature and air temperature, refer to Information Sheet 1650

Quality guarantee

PPG warrants (1) that it has good title to the product, (2) that the product quality conforms to the relevant technical quality specifications in force at the date of manufacture of the product, and (3) that the supplied product is free of lawful claims by third parties for infringement of US patent rights. The above warranties are limited to those given by PPG and other express or implied warranties required by applicable laws and regulations for transactions and commercial practice; any abuse contrary to the stated conditions, and any other warranty for special purposes or uses, are excluded, and PPG shall be free from liability. To claim under this warranty, the buyer must notify PPG in writing within five (5) days of discovering the quality defect, and the date must be within the product's valid storage period or within one (1) year from delivery of the product to the buyer.

If the buyer fails to notify PPG of the defect as required above, this will prejudice the buyer's right to obtain compensation under this warranty from PPG!

Limitation of liability

In all cases, PPG shall not be liable for any indirect, special, incidental or consequential loss of any kind arising from or in connection with the use of this product (whether based on negligence, strict liability or tort).

The information in this product data sheet is based on laboratory tests we believe to be reliable, and is provided for guidance only. PPG may revise this information at any time as experience accumulates and product development progresses.

All recommendations and advice concerning the use of this product, whether in technical documents, in response to an enquiry or otherwise, are given to the best of our knowledge and are believed to be reliable. Our products and related information are provided for industrial users possessing the necessary knowledge and practical skills, and it is the end user's responsibility to determine whether the product is suitable for the specific use. The buyer, having performed such evaluation, proceeds entirely at its own risk.

The quality and condition of the substrate on site, and the many other factors affecting product use and application, are beyond PPG's control. Therefore, PPG accepts no liability for any loss, injury or damage arising from the use of the information in this product data sheet (unless otherwise provided in a written agreement). Different application environments, changes to the application process or extrapolation of the reference data may result in failure to achieve the expected coating quality.

This product data sheet supersedes all previous versions. The buyer is responsible for confirming that the data sheet in hand is the latest version before using the product. The latest version is published on the official website of PPG Protective & Marine Coatings:

www.ppgpmc.com. In case of discrepancy between the Chinese version and the original English version of the product data sheet, the English original shall prevail.

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