PPG SIGMAGUARD 720 Special Tank Coating

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Introduction

Two-component reinforced high-solids pure epoxy specialty tank protective coating using polyamine adduct curing technology.

Key properties

• A special tank coating with good resistance to a wide range of chemicals.
• Complies with EI 1541 clause 2.2 (coating systems for tanks and pipelines carrying and storing aviation fuel).
• Short curing time.
• Good low-temperature curing performance.
• Easy to clean.

Colour and gloss

• Green, grey.
• Gloss

Basic data 20 °C (68 °F)

Parameters after mixing

Maximum 233.0 g/L (approx. 1.9 lb/gal) (theoretical calculated value).

Maximum time: 28 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

• Steel: abrasive blast clean to at least Sa 2½ (ISO 8501-1), with surface roughness 40–70 µm (1.6–2.8 mils).
• The previous coat must be clean, dry and free of all contaminants.
• Before recoating an existing coating, roughen the surface sufficiently if necessary.

Meets the IMO-MSC.288(87) technical specification for PSPC crude oil tanker cargo tank coatings:

• Bare steel: prepare structurally to grade P2 of ISO 8501-3:2006 before application; grind edges to a smooth radius of at least 2 mm (0.079 in), or use three-pass grinding, or at least equivalent treatment.
• Steel; blast cleaned to ISO-Sa2½, blast profile 30–75 µm (1.2–3.0 mils)
• In accordance with ISO 8502-3:2017, the contamination level of dust of size classes “3”, “4” or “5” must not exceed rating “1”. Finer dust (size classes “1” and/or “2”), if visible to the naked eye without magnification, must be removed.

Substrate temperature and application conditions

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

Coating system specification

The appropriate coating system is recommended based on the performance in the latest chemical resistance list.

• High-Solids Epoxy 720: 125 µm (5.0 mil).
• High-Solids Epoxy 720: 125 µm (5.0 mil).

The protective coating system for crude oil tanker cargo tanks complies with the technical specifications of IMO MSC.288(87).

• High-Solids Epoxy 720: 160 µm (6.3 mil).
• High-Solids Epoxy 720: 160 µm (6.3 mil).

Instructions for use

Mixing ratio by volume: base : curing agent = 3:1

• 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 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 table

Induction time after mixing

Air spray

Airless spray (single-feed pump)

Brush/roller

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

Cleaning solvent

• THINNER 90-53

Supplementary parameters

Film thickness and theoretical spreading rate

Notes

• Maximum DFT (brush): 100 µm (4.0 mils). Overcoating time for a coating with dry film thickness of 160 µm (6.3 mils)

Notes

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

System curing time - dry film thickness 320 µm (12.6 mils)

.

Notes

• For specific requirements on coating chemical resistance and related precautions, refer to the latest edition of the coating cargo list (TRIS).
• Adequate and continuous ventilation must be maintained during application and curing of the coating.

Curing time for a 160 µm (6.3 mil) dry film thickness

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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