SIGMAWELD 120 Epoxy Shop Primer 120

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Key properties

• Suitable for automated shot-blasting pre-treatment coating lines for steel plates.
• Good cutting and welding performance, including manual and gravity welding
• At an effective dry film thickness of 22 µm, it provides good corrosion protection for up to 6 months (depending on service conditions and the surface roughness after blasting)
• Good fast-drying performance.
• Can be used as the first primer in various coating protection systems in atmospheric exposure environments

Colour and gloss

• Red-brown
• Flat.

Basic data at 20 °C (68 °F)

Parameters after mixing

UK PG 6/23(92) Annex 3: max 653.0 g/L (approx. 5.4 lb/US gal).

Maximum: 6 months.

Curing agent: at least 12 months; store in a dry and cool environment.

Notes

• See supplementary parameters table — curing time table.
• See supplementary parameters — recoat interval table.

Recommended substrate condition and temperature

Substrate condition

• Bare steel: abrasive blast clean to Sa 2½ (ISO 8501-1), with surface roughness of 40–70 µm (1.6–2.8 mils).

Substrate Temperature

• During application and curing, the substrate temperature must be at least 3 °C (5 °F) above the dew point.
• On automated spray lines, the steel plate temperature is recommended to be controlled between 35 °C (95 °F) and 40 °C (104 °F).

Secondary surface preparation

• During storage, transport, cutting and prefabrication, the surface of the prefabrication shop primer shall be protected from contamination.
• After section assembly, surface defects may be treated as follows:

(abrade to SPSS -Pt2)

Instructions for use

Mixing ratio by volume: base : curing agent = 75:25 (3:1)

• After mixing base and hardener, the paint temperature should be kept above 15 °C (59 °F).
• Strain through a 30–60 mesh screen.
• The paint can be applied immediately after mixing evenly.
• Depending on the process flow, the steel surface temperature and the forward line speed, a suitable amount of thinner (Thinner 90-53) may be required.
• Stir continuously during application.

Air spray

Airless spray (single-feed pump)

Supplementary parameters

Recoating interval table for a 22 µm (0.9 mils) dry film

Curing time of the coating applied without any added solvent

Safety Precautions

• This is a solvent-borne coating. Avoid inhaling spray mist and solvent vapours, and avoid contact of uncured paint with skin and eyes.
• For the coating and its recommended thinners, see Safety Sheets 1430 and 1431 and the relevant Material Safety Data Sheet.

Worldwide

Although PPG Protective and 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

• For the conversion table, refer to Information Sheet 1410.
• For product data, refer to Information Sheet 1411.
• For safety guidance, refer to Information Sheet 1430.
• For safety and health in confined spaces and explosion hazard — toxic hazard, see Information Sheet 1431.
• For steel surface preparation, refer to Information Sheet 1490.
• For mineral abrasive specifications, refer to Information Sheet 1491.
• For relative humidity, substrate temperature and air temperature, refer to Information Sheet 1650.

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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