SIGMAZINC 108 Epoxy Zinc-rich Primer 108

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Introduction

A two-component, high-solids, polyamide-cured epoxy zinc-rich primer.

Key properties

• Used as a primer in various coating systems.
• Excellent anti-corrosion properties.
• Fast drying, allowing the subsequent coat to be applied within a short time.
• Suitable as a temporary protection primer in various coating systems for major refurbishment projects.
• Complies with the provisions on metallic zinc content of the Chinese chemical industry standard "HG/T3668-2009" and of the technical specification for anticorrosive coating of highway bridge steel structures "JTT 722-2008" respectively

requirements.

• Complies with the requirements of national standard GB50393.

Colour and gloss

• Grey, red-grey.
• Flat.

Basic data at 20 °C (68 °F)

Parameters after mixing

UK standard UK PG 6/23(92) Appendix 3: maximum 308.0 g/L (approx. 2.6 lb/US gal).

Maximum: 3 months.

Curing agent: at least 12 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

Immersion environment

• Bare steel: blast cleaning to Sa2½ of ISO 8501-1, with a surface profile of 40–70 µm (1.6–2.8 mil).
• Steel shot-blasted and coated with a confirmed compatible inorganic zinc silicate shop primer: sweep blast to grade Ss (SPSS).

Atmospheric exposure environment

• Bare steel: blast cleaning to Sa2½ of ISO 8501-1, with a surface profile of 40–70 µm (1.6–2.8 mil).
• Pre-treated steel coated with a confirmed compatible inorganic zinc silicate shop primer: sweep-blast to grade Ss of the SPSS standard, or power-tool clean to the SSPC

SP3 (i.e. Pt3 of the Japanese SPSS standard).

Substrate Temperature

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

Instructions for use

Volume mixing ratio: Base:Hardener = 6:1.

• For low-temperature application, preheat the paint to 15 °C (59 °F) or above; otherwise thinner may need to be added to reduce the paint viscosity to a level suitable for application.

.

• Excessive thinner usually reduces the sag resistance of the wet film and slows drying.
• 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 up to 75 µm (3.0 mils) dry film thickness

Notes

• Zinc salts form on zinc-rich primer surfaces; before recoating, avoid prolonged outdoor exposure of the coating.
• In clean outdoor environments, the maximum recoat interval may be extended to 3 months; in industrial or marine atmospheres, the maximum recoat interval must be shortened as much as possible according to actual conditions.
• Before recoating, any visible contamination must be removed by high-pressure water, abrasive sweep blasting or power tool preparation.

Curing time for a coating at 75 µm (3.0 mils) dry film thickness

Notes

• During application and curing, ensure continuous, adequate ventilation (see Safety Sheet 1433 and Information Sheet 1434).
• The product may be applied at ambient temperatures from 5 °C (41 °F) to 10 °C (50 °F), but curing will be slow at these temperatures.
• Under these application conditions, the following zinc-rich primers are recommended: Single-Component Epoxy Zinc-Rich Primer 19, Inorganic Zinc Silicate Primer 158, Inorganic Zinc Shop Primer 160, suitable

For atmospheric exposure under dry conditions; Inorganic Zinc Silicate 750 is suitable for immersed environments.

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 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.

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.