PPG SIGMALINE 855 (11) Two-component Solvent-free Polyurethane Coating

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Key properties

• A solvent-free coating for protective coating of inner and outer walls of pipelines and buried storage tanks
• Excellent anti-corrosion properties.
• Ultra-fast curing speed
• High abrasion and impact resistance
• Excellent adhesion
• Good water resistance
• External protection certified to EN 10290, certified for internal and external use to AWWA C222-18
• Certified to NSF/ANSI/CAN Standard 61 and suitable for potable water environments; for details, refer to the NSF website:

http://www.nsf.org/.

• Certified to NSF/ANSI/CAN Standard 61 and suitable for potable water environments; for details, refer to the NSF website:

https://www.truesdail.com/.

Colour and gloss

• Grey, blue, off-white
• Gloss

Basic data 20 °C (68 °F)

Parameters after mixing

Hardener: at least 6 months, should be stored in a dry and cool environment.

Notes

• See the supplementary data sheet — theoretical spreading rate versus dry film thickness table.
• See supplementary parameters table — curing time table.

Recommended substrate condition and temperature

Substrate condition

• Steel: blast clean to Sa 2½ of international standard ISO, surface roughness 75–100 µm (3.0–4.0 mils).

Substrate temperature and application conditions

• During application and curing, the substrate temperature should be above 10 °C (50 °F)
• During application and curing, the substrate temperature must be at least 3 °C (5 °F) above the dew point.
• During application, the relative humidity shall not exceed 75%, and adequate ventilation is required

Instructions for use

Mixing ratio by volume: base to hardener 1:1

• Use two-component high-pressure airless hot spray equipment.
• No thinning required.

Application

• To ensure good intercoat adhesion, before spot repair coating or full recoating of existing coatings, it is necessary to carry out appropriate surface preparation such as sweep blasting to roughen the surface or abrading.
• A repair kit specially for small-area manual repair is available, called "Solvent-free Polyurethane Pipeline Paint 855 (Repair)", product data sheet number {7655RP}
• If used outdoors in atmospheric exposure environments, it is recommended to overcoat with a SigmaDur series polyurethane topcoat.

Induction Time

0 min

Notes

• See supplementary parameters — pot life after mixing.

Airless spray (single-feed pump)

• An externally heated two-component airless spray pump.
• After the paint temperature in the pump is controlled between 40 °C and 60 °C (104 °F to 140 °F), its viscosity reaches a state suitable for coating.
• The paint temperature in the mixing unit of the equipment system must be maintained between 65 °C (149 °F) and 75 °C (167 °F).

Notes

• The paint temperature at the nozzle outlet shall reach 60 °C (140 °F)

Cleaning solvent

• THINNER 90-53

Cleaning procedure

• The mixed paint of the two components crosslinks and cures at a very fast speed at 60 °C (140 °F), reaching an insoluble state within a few seconds.
• Any part of the spray equipment that contacts the mixed base and hardener paint must be cleaned immediately after coating is finished or during any longer interruption.

Supplementary parameters

Film thickness and theoretical spreading rate

Curing time for a 1500 µm (60.0 mil) dry film thickness

Notes

• Adequate and continuous ventilation must be maintained during application and curing of the coating.
• Certified to NSF/ANSI/CAN Standard 61, final curing time 72 hours.

Pot life (at normal application viscosity)

Disclaimer

• SIGMALINE 855 (1:1) has passed type approval by authoritative bodies, meeting the various requirements of the intended design use.
• PPG Protective & Marine Coatings shall bear no liability or claim obligations for any odour, off-taste or contamination in potable water caused by the coating itself or by retained solvent in the coating film.

Safety Precautions

• Refer to the Material Safety Data Sheet and product package labelling for full details of the stated safety precautions and protective measures
• The curing agent contains isocyanates.
• Although solvent-free, the coating must be handled with care; avoid inhaling spray mist and 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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