AMERCOAT 71 TC epoxy primer/intermediate 71TC

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Key properties

• Can be used with a wide range of topcoats to form a long-life protective coating system; suitable for both immersed and non-immersed environments.
• Excellent adhesion to non-ferrous metals, galvanised surfaces, shop primer coatings and steel surfaces.
• Suitable as a tie coat for DIMETCOTE series inorganic zinc silicate primer coatings

Colour and gloss

• Off-white
• Flat.

Basic data at 20 °C (68 °F)

Parameters after mixing

UK standard UK PG 6/23(92) Appendix 3: maximum 435.0 g/L (approximately 3.6 lb/US gal).

5.1 m²/L at 100 µm (205 ft²/US gal at 4.0 mil).

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

Notes

• See supplementary parameters — recoat interval table.
• See supplementary parameters table — curing time table.

Recommended substrate condition and temperature

Substrate condition

• Bare steel: blast cleaning to Sa 2½ grade of international standard ISO-8501-1 or SSPC SP-10, with a roughness of 25–50 µm (1.0–2.0 mil).
• The compatible previous coat must be clean, dry and free of all contaminants.
• Where DIMETCOTE series inorganic zinc silicate primer coatings require overcoating with other specific topcoats, refer to the relevant application requirements.

Galvanized and aluminium surfaces

• Galvanised surfaces must be free of all oil and grease, soluble salts and contaminants.
• If galvanized parts have been exposed outdoors for at least 6 months, zinc salts shall be removed with power tools (such as grinder or sweep blasting).
• Aluminium surfaces must be clean and dry, free from any residual contaminants.
• Sweep blasting with fine abrasive is required.

Substrate temperature and application conditions

• During application, ensure the surface temperature is between 5 °F (41 °C) and 60 °F (140 °C).
• During application, the substrate surface temperature must be maintained at least 3 °C (5 °F) above the dew point.
• During application and curing, the ambient temperature shall be controlled between 5 °C (41 °F) and 50 °C (122 °F).
• The ambient relative humidity during application shall not exceed 85%.

Instructions for use

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

• Before application, raise the temperature of the base, curing agent or mixed paint to above 15 °C (59 °F); otherwise, additional thinner may be required

Adjust the paint viscosity to a state suitable for application.

• Add the curing agent to the base component and stir continuously until the two components are thoroughly mixed and fully homogeneous.
• Thinner shall be added only after the two components are mixed.
• Excessive thinning generally reduces the sag resistance of the wet film.

Induction Time

Not required.

Air spray

Airless spray (single-feed pump)

Brush/roller

Note: typical dry film thickness achievable in one coat is 40–50 µm (1.6–2.0 mil).

Supplementary parameters

Recoat interval for a coating up to 50 µm (2.0 mils) dry film thickness

Notes

Provided the coating surface is free from chalking and other contaminants, there is no maximum overcoating interval requirement for this product; in this case, general surface cleaning and sanding/roughening are sufficient to ensure good adhesion to the subsequent coat.

Curing time table for a coating at 50 µm (2.0 mils) dry film thickness

Notes

• Coating drying times depend on the ambient air temperature, steel substrate temperature, film thickness, ventilation and other environmental conditions.
• Times are longer at lower temperatures and shorter at higher temperatures.

Pot life after mixing (at suitable application viscosity)

Note: the pot life of the paint and the drying and curing times of the coating depend on site conditions: mixed paint volume, ambient and substrate surface temperature, climatic conditions and ventilation.

Safety Precautions

• Improper use and handling may harm health and cause fire or explosion; see the relevant safety precautions in the product data sheet/application guide and Material Safety Data Sheet.
• During application and coating curing, continuous and adequate ventilation must be ensured to allow sufficient solvent evaporation.

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.

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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