PPG SigmaWeld 120

Part A and B: UN1263 (Class: 3, Pk Grp: II)
Formerly Amercoat 139. A two component polyamide cured epoxy prefabrication primer.
Available in 20 Litres
From £273.42 £227.85
In stock
Only %1 left
Product Description

SigmaWeld 120 is a two component polyamide cured epoxy prefabrication primer suitable for automatic application to shot blasted steel plates and offers great cutting and welding properties including MMA and gravity welding.

Best uses

SigmaWeld 120 is designed to offer corrosion protection for up to 6 months, time dependant on exposure conditions and blasting profile. SigmaWeld 120 can be used as a first coat in various paint systems for atmospheric exposure conditions only.


SigmaWeld 120 can be applied using airless spray or air spray and is suitable for immediate application to steel surfaces. SigmaWeld 120 is touch dry after just 6 minutes in conditions of approximately 20°C and can be recoated after an interval of 12 hours has elapsed.

Surface and Environment

SigmaWeld 120 works to provide regular smooth welding seams and releases little or no fumes during welding and cutting. SigmaWeld 120 is ideal for use in the construction industry where welding is common practice. Please ring our technical support team for more information on this product and one of our highly experienced team of professionals will be happy to assist you.

Technical Details


  • Good cutting and welding properties, including MMA and gravity welding.
  • Provides corrosion protection up to 6 months, when applied at a DFT of 22 m (depending on exposure conditions and blasting profile).
  • Fast drying properties.
  • Can be used as a first coat in various paint systems for atmospheric exposure conditions only.

Technical Info

Components: Two Components
Type: Epoxy Prefabrication Primer
Finish: Flat
Stock Colours: Redbrown
Tintable: No
VOC Content: 653.0 g/l
Volume Solids: 21 +/- 2%
Suitable Substrates: Steel
Application Method: Brush, Roller, Airless Spray or Air-Atomised Spray
Theoretical Coverage: 9.5 m2/l for 22 microns
Wet Film Thickness (WFT): -
Dry Film Thickness (DFT): 22 microns (0.9 mils) per coat
Induction Time: -
Pot Life: 24 hours at 20°C
Touch Dry: 6 minutes at 20°C
Overcoatable: After minimum 12 hours to maximum 6 months at 20°C
Fully Cured: -
Cleaner / Thinner: Thinner 90-53
Shelf Life: At least 12 months when stored cool and dry
Packaging: Available in 20 Litres

The manufacturers data sheets are available for download from this website. It is your responsibility to read and understand all aspects of the data sheets before you place an order and prior to application. Please pay special attention to the preparation, mixing and application temperatures of the product, cleaning of substrate and environmental factors such as temperature, rain etc. Quoted coverage rates are based on the manufacturers theoretical rates and may vary depending upon substrates absorption, texture and application. We always recommend a test is carried out to ensure suitability.

Customer further agrees that Promain have no liability for any errors or omissions contained within the Product Data Sheets and are not liable for failure due to misapplication or inadequate substrate cleaning and preparation. For more information please refer to our Terms & Conditions.

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