PPG SIGMASHIELD 420 Abrasion-resistant Epoxy Coating 420

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Key properties

• Suitable for the protective coating of dry cargo holds of bulk carriers, cargo oil tanks of tankers and various storage tanks
• Suitable as an intermediate coat in abrasion-resistant coating systems for the underwater bottom and waterline of vessel hulls
• Excellent abrasion and impact resistance.
• High water resistance
• Easy to clean.

Colour and gloss

• Grey, red-brown (other colours available to order)
• Gloss.

Basic data at 20 °C (68 °F)

Parameters after mixing

UK PG 6/23(92) Annex 3: max 239.0 g/L (approx. 2.0 lb/US gal).

Chinese national standard GB 30981-2020 (measured): 178.0 g/L (approx. 1.5 lb/gal)

4.1 m²/L at 200 µm (162 ft²/US gal at 8.0 mils).

Maximum: 14 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

Substrate condition

• The previous coat must be clean, dry and free of all contaminants.

Substrate temperature and application conditions

• During application and curing, the substrate temperature must be at least 3 °C (5 °F) above the dew point
• During application and curing, the minimum acceptable substrate surface temperature is 5 °C (41 °F).

Instructions for use

Mixing ratio by volume: base : curing agent = 75:25 (3:1)

• Before application, raise the temperature of the components or the mixed paint to above 15 °C (59 °F); otherwise, thinner may need to be added to adjust the paint viscosity

to a state suitable for application.

• Excessive addition of water may reduce the sag resistance of the wet film, slow hard drying and even reduce strength.
• The thinner should be added after the two components are mixed.

Induction Time

Not required

Air spray

Airless spray (single-feed pump)

Brush/roller

Supplementary parameters

Film thickness and spreading rate

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

Curing time table for a coating at 150 µm (6.0 mils) dry film thickness

Notes

• Notes for use as a protective coating for dry cargo holds: for the required time for the coating system to reach full cure before loading angular hard cargoes, consult PPG Coatings

(PPG Protective & Marine Coatings) Technical Support and Service.

• During application and curing, ensure continuous, adequate ventilation (see Safety Sheet 1433 and Information Sheet 1434).
• If a single coat of Abrasion-resistant Epoxy 420 is over-thick, or the whole system is over-thick (e.g. exceeding 2 x 125 µm), the full cure time should be extended accordingly

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.
• For safety and health in confined spaces and 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 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.

The PPG logo, and all other PPG marks are property of the PPG group of companies. All other third-party marks are property of their respective owners.