SIGMAWELD 165 — Two-Component, Moisture-Curing Inorganic Zinc Silicate (Ethyl Silicate) Pre-treatment Shop Primer

Browse Similar Models by Category

The manufacturer's datasheet for this model does not state the coating position or resin type, so it has not been assigned to the above categories. Browse similar products by category, orContact Usconfirm the coating system.

Introduction

A two-component moisture-curing inorganic silicate (ethyl ester) zinc pre-treatment shop primer.

Key properties

• Suitable for automated shot blasting pre-treatment coating lines for steel plates.
• Good fast-drying performance.
• Good cuttability and excellent weldability, suitable for MIG/MAG welding (automatic or manual).
• At a dry film thickness of 13 µm, the coating provides 9 months of long-term anti-corrosion protection (depending on service environment and pre-treatment surface roughness).
• Can be used as the initial original protective primer of various coating systems.
• With an auxiliary well-designed cathodic protection system, it is suitable for seawater immersion areas.
• Excellent thermal stability, ensuring that the area and degree of coating burn-off during hot work are minimized.
• The shop primer coating surface does not adhere to weld spatter.
• Certified by Lloyd's Register as a pre-treatment shop primer {see data sheet (1880)}.

Colour and gloss

• Grey, red-grey.
• Flat.

Basic data 20 °C (68 °F)

Parameters after mixing

Maximum value 645.0 g/L (approx. 5.4 lb/gal) (theoretical calculated value).

Maximum time: 9 months.

Paste component: at least 12 months, but must be stored in a cool and dry environment.

Notes

• See supplementary parameters table — curing time table.
• If the intact film is still solid and firmly bonded, the maximum overcoating interval can be extended accordingly.

Recommended substrate condition and temperature

Substrate condition

• Bare steel: abrasive blast clean to Sa 2½ of international standard ISO 8501-1, surface roughness 30–75 µm (1.2–3 mils).
• Within the above roughness range, the recommended effective dry film thickness is 13 µm, with anti-corrosion efficacy equivalent to a 15 µm dry film coating applied directly on the smooth surface of the member substrate.
• The minimum film thickness on a smooth test panel must not be below 13 µm.
• 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

• The substrate surface temperature during coating must not be higher than 50 °C (122 °F)
• During coating, the substrate temperature must be at least 3 °C (5 °F) above the dew point
• During coating curing, the ambient relative humidity must be above 50% and below 85%.

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:
• Two optional surface treatment methods are listed; select the applicable scheme according to the coating system used and the location.
• The following table lists only our recommended ideal surface treatment methods, with other equivalent methods in parentheses.

cleanliness ISO Sa 2 ½ (SPSS-Pt3)

Notes

• In discoloured areas, there may be completely burned-out areas (particularly with thin plate welding); these areas shall be treated according to the "burned areas" above.
• Grind clean with a (silicon carbide) diamond sanding disc.
• Surface cleanliness is Class 1 of ISO 8502-3 (only for large particle dust of classes 3, 4, 5; but any other visible small particle dust must also be removed).
• On the back of steel plates subsequently welded, the coating surface may show discoloration (especially at fillet welds); such areas should not be mistaken for burned areas, and usually no further special treatment is needed.

Instructions for use

Mixing ratio by volume: base liquid : zinc powder paste = 55 : 45

• The temperature of the mixture of liquid and zinc powder paste should preferably be above 15 °C (59 °F).
• Before adding the liquid, stir the zinc powder paste thoroughly.
• Gradually add 1/3 of the base into the paste.
• Stir thoroughly until completely mixed.
• Add the remaining liquid and continue stirring until the mixture reaches a thoroughly mixed homogeneous state.
• Filter the mixed paint through a 30–60 mesh screen.
• The paint can be applied immediately after thorough mixing.
• 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)

Notes

• Depending on the actual on-site application conditions, add an appropriate amount of thinner as required to ensure ideal application performance. If problems arise, contact the field technical service representative of PPG Protective & Marine Coatings.

Cleaning solvent

• THINNER 90-53

Supplementary parameters

TRANSLATION MISSING

Safety Precautions

• Refer to the Material Safety Data Sheet (MSDS) and product package labelling for full details of the stated safety precautions and protective measures.
• This is a solvent-borne coating. Avoid inhaling spray mist 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.