PPG SIGMACOVER 300 Tar Epoxy Coating 300

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Key properties

• Excellent resistance to (sea)water (outer hull plating and ballast water tanks)
• High water and crude oil resistance
• Excellent anti-corrosion properties
• Good resistance to chemical effluent
• Can be applied and cured at low temperatures (provided the substrate surface is dry and free of ice, application temperature can be as low as –5 °C (23 °F))
• Good abrasion resistance
• Highly recognised corrosion protection coating (Lloyd's Register certified)
• Compatible with well-designed, well-controlled cathodic protection systems

Colour and gloss

• Black, brown
• Eggshell

Basic data at 20 °C (68 °F)

Parameters after mixing

Maximum 305.0 g/L (approx. 2.5 lb/gal) (theoretical calculated value)

Maximum time: 4 days exposed to direct sunlight; maximum time: 18 days exposed to indirect sunlight

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

Notes

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

Recommended substrate condition and temperature

For immersed environments, compatible with cathodic protection systems

• Bare steel: abrasive blast clean to Sa 2½ (ISO 8501), with surface roughness of 40–70 µm (1.6–2.8 mils)
• Apply to a confirmed compatible inorganic zinc silicate shop primer surface, sweep-blast cleaned to SSPC-SP 7 (SS) or SSPC-SP 2 (Pt2).
• The substrate surface must be clean, dry and free of all contaminants.
• Existing coal-tar epoxy coatings must be thoroughly abraded

Used alone in immersion environments without cathodic protection

• Bare steel: abrasive blast clean to Sa 2½ (ISO 8501), 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
• The substrate surface must be clean, dry and free of all contaminants.
• Existing coal-tar epoxy coatings must be thoroughly abraded

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.
• The substrate surface must be clean, dry and free of all contaminants.
• Existing coal-tar epoxy coatings must be thoroughly abraded

Substrate temperature and application conditions

• During application and coating curing, the substrate temperature shall be at least above 5 °C (41 °F)

To ensure the coating fully meets the requirements for resistance to chemicals and mechanical damage.

• During application and curing, the substrate temperature must be at least 3 °C (5 °F) above the dew point
• Suitable for application at ambient temperatures as low as –5 °C (23 °F), but in

this case the time for the coating to cure to the expected hard dry will become longer, but as the temperature rises to a suitable temperature, the coating can still fully cure.

Coating system specification

• Anti-corrosive coating for underwater and boottop areas of the hull — system sheet SYSTEM SHEET 3101
• Coating system for the boottop and topsides of the hull — system sheet SYSTEM SHEET 3102
• Coating system for ballast water tanks — coating system information sheet SYSTEM SHEET 3106
• Coating system for dry cargo holds — system sheet SYSTEM SHEET 3107

Instructions for use

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

• Excessive thinning may reduce the sag resistance of the wet film and slow curing.
• After mixing the base and curing agent, the temperature shall be above 15 °C (59 °F); otherwise, thinner shall be added to achieve the viscosity required for application
• The thinner should be added after the two components are mixed

Pot life after mixing

6 h at 20 °C (68 °F). Note: refer to supplementary data — pot life

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: 125 µm (5.0 mils). Recoat interval table for a dry film thickness of 250 µm (10.0 mils)

and Tar Epoxy Tie-Coat 510

Notes

• The surface must be clean, dry and free of all contaminants.
• When overcoated with other coatings, tar bleed-through may occur
• When the film thickness of a single application exceeds 250 µm dry film (10.0 mils)

, the recoat interval for applying the subsequent coat must be adjusted and extended: 300 µm (12.0 mils), extended to 2 times; 500 µm (20.0 mils), extended to 3 times.

• Maintain adequate ventilation during application and curing (see sheets {1433} and {1434})

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

initial cure time in these environments

Notes

• During application and curing, ensure continuous, adequate ventilation (see Safety Sheet 1433 and Information Sheet 1434)
• The coating can be exposed to seawater after reaching initial cure
• If Coal Tar Epoxy 300 is applied by heated airless spray, the coating can be immersed in seawater after a 4-hour initial cure time
• If the dry film thickness of a single coat applied in one application is between 250–500 µm, the coating curing time must be doubled and extended to achieve sufficient mechanical strength
• When applied at low temperatures, the coating cures slowly and the initial film strength is relatively low, but it will rise rapidly after the coating is immersed in seawater.

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
• 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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