PPG SIGMACOVER 522 Two-component Polyamide-cured Epoxy MIO Primer/Sealer/Topcoat

Browse Similar Models by CategoryThis model belongs to: Primer, Intermediate Coat, Epoxy

Introduction

Two-component polyamide-cured epoxy micaceous iron oxide primer/sealer/topcoat.

Key properties

• Can be used as a sealer over inorganic zinc silicate primers and thermally sprayed metal coatings; even on old coatings that have been weathered outdoors for some time, adequate surface cleaning provides equally good adhesion, and the film offers excellent wetting and flow as well as penetrating sealing performance.
• On galvanized surfaces, good adhesion is achieved with moderate preparation only.
• Can be used as a protective coating system for dry, atmospherically exposed environments or immersed underwater environments.
• Suitable for general industrial plant areas or atmospheric environments with chemical pollution; the coating provides good anticorrosive performance.
• High abrasion and impact resistance
• Passes thermal cycling testing from high temperature to extreme cold, i.e. from -196°C (-321°F) to 140°C (284°F).
• In dry atmospheric environments, the coating resists surface temperatures up to 200°C (390°F).

Basic data 20 °C (68 °F)

Parameters after mixing

Maximum 374.0 g/L (approx. 3.1 lb/gal) (theoretical calculated value).)

6.0 m²/L at 100 µm (241 ft²/US gal at 4.0 mils).

Maximum: 1 month.

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

• Steel: abrasive blast clean to Sa 2½ (ISO 8501-1), with surface profile 40–70 µm (1.6–2.8 mils)
• Shop-primed steel: sweep blast to SPSS-Ss grade or power tool clean to SSPC standard Pt3 grade.
• Surfaces of epoxy zinc-rich primers and inorganic zinc silicate primers must be clean and dry, with all contaminants removed.
• Galvanized surfaces: abrading only for dry, atmospherically exposed environments; sweep blasting is required for immersed conditions in water.
• Stainless steel and other non-ferrous metal surfaces: light sweep blasting to provide sufficient surface roughening.
• Confirmed compatible previous coat: the surface must be clean, dry and free of all contaminants.
• Where the product is used as a primer to enhance intercoat adhesion, commonly referred to as a tie coat, or as a transitional coat intended to extend the maximum recoating interval before a specific subsequent coat is applied, a maximum dry film thickness of 50 µm is recommended so that the required surface profile is retained as far as possible.

Substrate Temperature

• During application and curing, the substrate temperature must be above 10°C (50°F)
• Application is possible at ambient temperatures down to 5°C (41°F); in this case the time for the coating to reach the expected hard dry becomes considerably longer, but once the temperature rises to a suitable level, the coating can still cure completely.
• During application and curing, the substrate temperature must be at least 3 °C (5 °F) above the dew point.

Instructions for use

Mixed volume ratio: Base : Hardener = 4.56:1

• 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 to adjust the paint viscosity to a suitable application state.
• Excessive thinning generally reduces the sag resistance of the wet film.
• The thinner should be added after the two components are mixed.

Notes

• See supplementary parameters — pot life after mixing.

Air spray

Airless spray (single-feed pump)

Brush/roller

Cleaning solvent

• THINNER 90-53

Supplementary parameters

Film thickness and theoretical spreading rate

Overcoating time for a 50 µm (2.0 mil) dry film thickness

Recoat time for a coating at 100 µm (4.0 mils) dry film thickness

Notes

• The surface must be clean, dry and free of all contaminants.
• When Epoxy 522 is applied over an old (alkyd) primer or topcoat, the minimum recoat interval is 5 times the time listed in the table above.
• A high gloss topcoat requires a suitable intermediate coat.

Curing schedule for a coating with a dry film thickness of 100 µm (4.0 mil)

Notes

• Adequate and continuous ventilation must be maintained during application and curing of the coating.
• To ensure the desired chemical resistance of coating systems used in tanks, the substrate temperature must be maintained above 10°C (50°F) during application and curing.

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.

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.