PPG SIGMACOVER 850 Polyamine-adduct-cured Epoxy Glass Flake Coating

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Introduction

Two-component, ultra-high solids polyamine adduct-cured epoxy glass flake coating.

Key properties

• Also suitable for offshore equipment and onshore facilities.
• Designed for industrial heavy-duty anticorrosion and other severe corrosive environments.
• Glass flake reinforcement technology effectively improves coating impact resistance and wear resistance.
• Excellent cracking resistance, seawater resistance and anticorrosion performance.
• A single coat applied in one pass achieves the expected long-term protection.
• Compatible with well-designed cathodic protection systems.
• Strong adhesion to various surface conditions; also suitable for wet abrasive blast-cleaned substrates (whether the surface is dry or wet).

Colour and gloss

• Light grey (other colours can be customized on request).
• Gloss.

Basic data 20 °C (68 °F)

Parameters after mixing

UK PG 6/23(92) Appendix 3: maximum 220.0 g/L (approx. 1.8 lb/US gal).

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 performance of the coating depends on the quality of surface preparation.
• Bare steel: blast cleaning to Sa2 or Sa2½ of ISO 8501-1.
• Surface roughness after abrasive blast cleaning is recommended to be controlled at 40–80 µm (1.6–3.1 mil).
• High-pressure water jetting to SSPC-VIS 4 standard WJ2/3 L grade.
• Confirmed compatible previous coat: the surface must be clean, dry and free of all contaminants.

Substrate Temperature

• During coating application and coating curing, ensure substrate temperature is above 0 °C (32 °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 : curing agent = 4:1

• If necessary, thin as appropriate, but do not exceed the specified ratio, to bring the application properties of the paint to the ideal state.
• Excessive thinning may reduce the sag resistance of the wet film, slow hard drying and even reduce strength.
• If thinning is necessary, add thinner in an appropriate amount after mixing.

Notes

• See supplementary parameters — pot life after mixing.

Air spray

Airless spray (single-feed pump)

Brush/roller

• For local small-area repair and touch-up only.

Cleaning solvent

• THINNER 90-53

Supplementary parameters

Film thickness and theoretical spreading rate

Overcoating interval schedule for dry film thickness up to 500 µm (20.0 mil)

Notes

• Before recoating, ensure the surface is clean, dry and free of all contaminants.

Curing schedule for dry film thickness up to 500 µm (20 mil)

Notes

• For dark-coloured coatings used in tidal zones such as dams and piles, if the coating is prematurely immersed in water in an undried state after completion, surface whitening may occur, but the final anticorrosion performance of the coating will not be substantially affected.
• Adequate and continuous ventilation must be maintained during application and curing of the coating.

Pot life (at normal application viscosity)

Safety Precautions

• Refer to the Material Safety Data Sheet and product package labelling for full details of the stated safety precautions and protective measures
• This is a solvent-borne coating. Avoid inhaling spray and solvent vapours, and avoid contact of uncured paint with skin and eyes

Worldwide applicability

Although PPG Protective & 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

• Information sheet | Explanation of product data sheets

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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