PPG SIGMACOVER 300 LT Tar Epoxy Coating 300LT (Winter Grade)

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Key properties

• Excellent seawater resistance (hull outer plating and ballast tanks)
• High water and crude oil resistance
• Excellent anti-corrosion properties
• Good resistance to chemical effluent
• Curing temperature may be as low as -10 °C (14 °F)
• Coating application can proceed normally even at low temperatures
• Compatible with well-designed, well-controlled cathodic protection systems

Colour and gloss

• Black, brown
• Eggshell

Basic data at 10 °C (50 °F)

Parameters after mixing

British Standard UK PG 6/23(92) Appendix 3: maximum value 305.0 g/L (approx. 2.5 lb/US gal)

2.8 m²/L for 250 µm (114 inch²/US gal for 10.0 mil)

Maximum time: 3 days exposure to direct sunlight Maximum time: 30 days exposure to environments without direct sunlight

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

In immersion service or without supplementary cathodic protection

• Bare steel: abrasive blast clean to Sa 2½ (ISO 8501-1), with surface roughness of 40–70 µm (1.6–2.8 mils).
• Applied over confirmed compatible inorganic zinc silicate shop primer surfaces; sweep-blast to grade Ss of the SPSS standard or power-tool clean to Pt3 of the SPSS standard
• Existing coal-tar epoxy coatings must be thoroughly abraded
• The substrate surface must be clean, dry and free of all contaminants.
• When the substrate temperature falls to freezing point, check that the surface is free of ice

Atmospheric exposure environment

• Steel; blast cleaning to Sa2 of ISO 8501-1, with a surface profile of 40–70 µm (1.6–2.8 mil)
• Applied over confirmed compatible shop primer surfaces, power-tool cleaned to Pt2 or Pt3 of the SPSS standard.
• Existing coal-tar epoxy coatings must be thoroughly abraded
• The substrate surface must be clean, dry and free of all contaminants.
• When the substrate temperature falls to freezing point, check that the surface is free of ice

Substrate temperature and application conditions

• During application, substrate temperature shall be controlled within -10 °C (14 °F) to 15 °C (59 °F).
• During application, the substrate surface temperature must be maintained at least 3 °C (5 °F) above the dew point.
• During application and curing, the substrate temperature may fall to -10 °C (14 °F), but in this case the degree of cure required for the coating to reach the expected hardness

may take a long time. However, as the temperature rises, the coating will achieve full protective performance after complete cure.

• During application and curing, the relative humidity must not exceed 85%

Coating system specification

• Anti-corrosive coating for underwater and boottop areas of the hull — system sheet SYSTEM SHEET 3101
• Coating system for ballast water tanks — coating system information sheet SYSTEM SHEET 3106

Instructions for use

Volume mixing ratio: base : curing agent = 86:14

• As far as possible, ensure the mixed paint temperature of the base and curing agent is above 5 °C (41 °F); otherwise, additional thinner may be required to adjust the viscosity to a suitable

application state.

• Excessive thinning may reduce the sag resistance of the wet film and slow curing.
• The thinner should be added after the two components are mixed

Induction Time

Not required

Air spray

Airless spray (single-feed pump)

Brush/roller

• For local repair and manual touch-up only

Supplementary parameters

Film thickness and spreading rate

Note: Maximum dry film thickness for brush application: 70 µm (2.8 mil). Recoating interval schedule for coatings with a dry film thickness of 125 µm (5.0 mil).

or other compatible coatings

Maximum exposure time in environments not exposed to sunlight 30 days 30 days 30 days 20 days

Notes

• The surface should be dry and free from all contamination and ice
• When overcoated with other coatings, tar bleed-through may occur
• When the dry film thickness of a single coat applied in one application exceeds 125 µm (5 mil), the minimum overcoating interval must be extended accordingly based on the following principle: 250 µm (10.0 mil), extend

Up to 2 times; 375 µm (15.0 mil), extended to 3 times; 500 µm (20.0 mil), extended to 4 times).

• Maintain adequate ventilation during application and curing (see sheets {1433} and {1434})
• When application is only possible at low temperatures, note that the mixed paint temperature must be above 15 °C (59 °F), and the induction time should be extended to at least 1 h

Curing time table for a coating at 125 µm (5.0 mils) dry film thickness

initial cure time in these environments

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)

• For the coating and its recommended thinners, see Safety Sheets 1430 and 1431 and the relevant Material Safety Data Sheet
• This is a solvent-borne coating. Avoid inhaling spray mist and solvent vapours, and avoid contact of uncured paint with skin and eyes.

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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