PPG SIGMAGUARD CSF 650 Two-component Solvent-free Amine-cured Epoxy Coating

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Introduction

A two-component, solvent-free, amine-cured epoxy.

Key properties

• Suitable for crude oil tanks, ballast water tanks, and product tanks or storage tanks for aliphatic petroleum products.
• Can also be used as a coating system for storing and carrying potable water.
• Offers good resistance to a wide range of chemicals.
• High resistance to crude oil, with oil temperatures up to 60 °C.
• Complies with EI 1541 clause 2.2 (coating systems for tanks and pipelines carrying and storing aviation fuel).
• Can serve as a single-coat protection system for tanks, ships and other steel structures, with high anticorrosive performance.
• A universal epoxy intermediate coat or primer for steel and concrete surfaces.
• Reduces explosion risk and fire hazard.
• Light, conspicuous colour, easy to identify.
• A (translucent) clear version is also available for use in glass fibre mesh or glass fibre chopped-strand reinforced coating systems.

Colour and gloss

• Green, off-white and clear (translucent).
• Gloss.

Basic data 20 °C (68 °F)

Parameters after mixing

EU Directive 2010/75/EU, SED: max 109.0 g/kg.

EPA Method 24: 120.0 g/L (1.0 lb/gal)

Maximum: 20 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

• Bare steel; blast cleaning to Sa2½ of ISO 8501-1, with a surface profile of 50–100 µm (2.0–4.0 mil).
• Suitable primers: NOVAGUARD 260, SIGMACOVER 280, SIGMAPRIME series or SIGMACOVER 522, as required by the system
• Bare steel: for small scattered areas and isolated spots in fresh water and potable water tanks where blast cleaning is not practical (local repair and welds): power tool cleaning to ISO St3.

Substrate temperature and application conditions

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

Coating system specification

• Solvent-free epoxy CSF650: 1 x 300 µm (12.0 mils); or: 1 x 50 µm (2.0 mils) compatible primer + 1 x 250 µm (10.0 mils) solvent-free epoxy CSF650.

Instructions for use

Mixing ratio by volume: base : curing agent = 4:1

• At low temperatures, spraying may be difficult because of high paint viscosity.
• Recommended application guidance: see the dedicated product application procedure.
• After mixing, the base and hardener should be brought to a temperature above 20 °C (68 °F).
• No thinning required.

Induction Time

0 min

Notes

• Not required

Notes

• See supplementary parameters — pot life after mixing.

Airless spray (single-feed pump)

• Use a heavy-duty single-component spray pump with a 60:1 pressure ratio and suitable high-pressure hose/in-line heating or insulation, to prevent the paint in the hose from cooling and thickening during low-temperature application.
• With high-pressure hoses fitted with a line heating system, application is possible using a 45:1 single-component spray pump.
• Keep hoses as short as possible.

Notes

• When applying with a 45:1 single-component spray pump, heat the paint in the hose to about 30 °C (86 °F) so that the viscosity is adjusted to a state suitable for application.

Brush/roller

Cleaning solvent

• Thinner 90-53 or Thinner 90-83
• All application equipment must be cleaned immediately after use.
• Paint remaining in spray equipment must be fully discharged within its pot life.

Supplementary parameters

Wet film thickness measurement

• On site, wet film thickness readings often differ from the true film thickness because of the thixotropic nature and surface tension of the paint; air entrapped in the paint escapes slowly and temporarily occupies part of the wet film volume.
• In practice, it is recommended to control the measured wet film at the specified dry film thickness plus 60 µm (2.4 mil).

Measure dry film thickness

• As the freshly applied film is initially not hard enough, measuring film thickness too early may cause the gauge probe to sink in and give a low reading. Measure film thickness at the appropriate time to avoid inaccurate readings!
• When measuring dry film thickness, place a calibration shim of known thickness over the coating at the test point, then gently press the gauge probe onto the shim to measure the film thickness through it.

Final cleaning procedure

• After completion of the coating system, the tank shall be washed according to the recommended tank-washing procedure.
• Sufficient time shall be allowed to ensure ventilation, drying and full cure, meeting the recommendations of the latest product data sheet and process specification.
• Always operate in accordance with the applicable tank-washing procedure.
• Several effective tank-washing procedures are available for selection (for example, see the washing procedures recommended in the product type approval certificate).

Option 1: suitable washing procedure

• After the coating system reaches full cure as required by the latest product data sheet, the tank shall be filled with fresh tap water.
• The tap water shall remain in the tank for at least 4 days.
• Then wash all tank surfaces — walls, bottom and top — thoroughly with high-pressure water.
• After washing, drain the tank completely.
• Only after the above cleaning procedure can the tank be filled with water and put into service.

Option 2: suitable washing procedure

• All personnel shall wear waterproof clothing, boots and gloves, which shall be disinfected beforehand with sodium hypochlorite solution (1% active chlorine).
• All tank walls, bottom and top shall be brushed or sprayed under high pressure with the above 1% active chlorine solution. Note: tank-washing machines may also be used for spraying.
• All areas shall be washed with high-pressure tap water, and the tank dried.
• Concentrate the active chlorine solution on the tank bottom, about 1 L per 10 m² (about 1 quart per 100 ft²)
• Fill the tank with tap water to a depth of about 20 cm and keep the water in the tank for at least 2 hours (up to 24 hours).
• After draining the waste water, the whole surface of the tank shall be rinsed thoroughly with tap water.
• After filling the tank with water, water samples may need to be taken to check the bacterial content, according to local regulations.
• Only after the above cleaning procedure can the tank be filled with water and put into service.

Film thickness and theoretical spreading rate

Notes

• Maximum dry film thickness for brush application: 200 µm (8.0 mils).

Overcoating time for a 300 µm (12.0 mil) dry film thickness

Notes

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

Curing time for a 300 µm (12.0 mil) dry film thickness

Notes

• Adequate and continuous ventilation must be maintained during application and curing of the coating.
• The coating system for potable water tanks must be washed out after full cure and before commissioning.
• If the coating system is used for storing and carrying potable water, strictly follow the recommended application and tank-cleaning procedures.

Pot life (at normal application viscosity)

Notes

• Because mixing is an exothermic reaction, the paint temperature may rise during mixing and for some time afterwards.

Disclaimer

• Solvent-free epoxy CSF650 has passed type approval by an authorized body and meets the requirements for its intended use.
• PPG Protective & Marine Coatings assumes no liability or obligation for claims arising from any odour, off-taste or contamination of drinking water caused by the coating itself or by retained solvents in the coating.

Safety Precautions

• In confined spaces, provide adequate ventilation to maintain good visibility.
• Although solvent-free, the coating must be handled with care; avoid inhaling spray mist and contact of uncured paint with skin and eyes.
• If personnel work in concentrations above the above explosive limits, they must wear full personal protective equipment (PPE).
• Refer to the Material Safety Data Sheet and product package labelling for full details of the stated safety precautions and protective measures

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

• Guide | Tank maintenance | Our guide to the economical repair of corroded tank bottoms
• 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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