PPG SIGMACOVER 630 Epoxy Coating 630

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Key properties

• A surface-tolerant coating with low steel surface preparation requirements before application
• Particularly suitable for maintenance and repair coating of dry cargo holds, decks and ship hulls
• A general-purpose epoxy intermediate coat or topcoat for protective coating systems of steel and concrete structures in inland and marine atmospheric environments.
• Generally good recoat compatibility on various aged coating surfaces
• Can be overcoated with the vast majority of subsequent coats
• Excellent anti-corrosion properties
• Resistant to spillage and splashes of many chemicals
• Good flexibility

Colour and gloss

• Green, grey, red-brown, black and aluminium
• Semi-gloss

Basic data at 20 °C (68 °F)

Parameters after mixing

Maximum 232.0 g/L (approx. 1.9 lb/gal) (theoretical calculated value)

4.2 m²/L at 200 µm (166 inch²/US gal at 8.0 mil)

See the recoat interval table

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

Atmospheric exposure environment

• Bare steel; for the coating system to deliver excellent anticorrosive performance, abrasive blast cleaning to Sa2½ of international standard ISO-8501-1 shall be carried out.
• Bare steel: abrasive blast cleaning to Sa2 of international standard ISO-8501-1 with a roughness of 40–70 µm (1.6–2.8 mil), or power tool cleaning to St2 of international standard

ISO-8501-1; good anticorrosive performance can also be achieved.

• Shop-primed steel: prepare to Pt3 (SPSS)
• Steel surfaces with aged coatings: high-pressure water cleaning to SSPC VIS WJ2/3 L.
• Existing firmly adherent aged coatings; thoroughly abrade and ensure the surface is clean and dry.

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)
• Confirmed compatible inorganic zinc silicate shop primer: sweep blast to grade Ss (SPSS) or prepare with power tools to Pt3 (SPSS)
• The first primer coat must be aluminium-coloured Epoxy 630

Substrate Temperature

• 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

Instructions for use

Volume mixing ratio: base : curing agent = 83:17

• After mixing the base and curing agent, raise the paint temperature to above 15 °C (59 °F),

otherwise, additional thinner may be required to adjust the paint 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

Pot life after mixing

2 h at 20 °C (68 °F). Note: see supplementary parameters — pot life after mixing

Air spray

Airless spray (single-feed pump)

Brush/roller

Supplementary parameters

Relationship between dry film thickness and theoretical spreading rate for brush and roller application

Note: Maximum dry film thickness for brush application: 100 µm (4.0 mil). Relationship between dry film thickness and theoretical spreading rate for airless spray

Recoat interval for a coating at 150 µm (6.0 mils) dry film thickness

Notes

• The surface must be clean, dry and free of all contaminants.
• If a polyurethane topcoat is applied as the subsequent coat, the minimum recoat interval shall be doubled

Notes

• If a high-gloss topcoat is applied after the maximum overcoating interval is exceeded, an appropriate intermediate coat is required.
• The surface must be clean, dry and free of all contaminants.
• Applying the subsequent coat before the previous coat is fully cured gives better intercoat adhesion.
• If this period is exceeded, surface abrading is required

Curing time table for a coating at 150 µm (6.0 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
• 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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