PPG SigmaWeld 190

    7167
    PPG3937

    PPG SigmaWeld 190 is a two-component, moisture-curing low zinc (ethyl) silicate prefabrication primer with good cutting and excellent welding properties, including MIG/MAG welding in various positions (either automatic or manual welding).

    • Suitable for automatic application on shot blasted steel plates
    • Low fume release during welding and cutting
    • Provides regular, smooth weld seams

    Colour
    Size
    Finish
    £251.71(ex. VAT)
    £302.06 (inc. VAT)
    Quantity
    Please choose your colour
    Available for Delivery (See Delivery Options Below)

    Description

    PPG SigmaWeld 190 is a two-component, moisture-curing low zinc (ethyl) silicate prefabrication primer with good cutting and excellent welding properties, including MIG/MAG welding in various positions (either automatic or manual welding). Suitable for automatic application on shot blasted steel plates, the fast-drying properties of PPG SigmaWeld 190 enable quick overcoat times.

    Features & Benefits


    • Provides regular, smooth weld seams
    • Low fume release during welding and cutting
    • No adherence of weldspatter at surrounding primed surface
    • Excellent thermal stability minimizes heat damage during hot work procedures
    • Can be used as a first coat in various paint systems
    • Suitable for sea water immersion in combination with controlled cathodic protection systems
    • Approved by major classification societies like Lloyd's Register and DNV-GL for use as a prefabrication primer

    Product Data


    Two-component, moisture-curing low zinc (ethyl) silicate prefabrication primer.

    Data for mixed product
    Number of componentsTwo
    Mass density1.2 kg/l (10.0 lb/US gal)
    Volume solids25 ± 2%
    VOC (Supplied)Directive 1999/13/EC, SED: max. 552.0 g/kg
    max. 680.0 g/l (approx. 5.7 lb/US gal)
    Recommended dry film thickness18 µm (0.7 mils)
    Theoretical spreading rate13.9 m²/l for 18 µm (573 ft²/US gal for 0.7 mils)
    Dry to handle6 minutes
    Overcoating IntervalMinimum: 3 days
    Maximum: 6 months
    Full cure after3 days
    Shelf lifeBinder: at least 9 months when stored cool and dry
    Paste: at least 12 months when stored cool and dry

    Notes:

    • Refer below for more details on spreading rate and film thickness, overcoating intervals and curing times
    • Longer overcoating intervals can be permitted when the primer is still in sound condition
    • Full cure time for Relative Humidity (RH) of > 50 %
    • Processing of coated steel plates (bending, welding, etc.) and overcoating is only recommended when the shopprimer is fully cured
    • More detailed information on application, handling and storage of steel plates is presented in the SIGMAWELD 190 Working Procedure

    Surface Preparation


    Recommended Substrate Conditions and Temperatures

    Substrate conditions

    • Steel; shot blast cleaned to ISO-Sa2½, blasting profile 30 – 75 µm (1.2 – 3 mils)
    • On steel blasted to above profile, the recommended DFT of 18 µm (0.7 mil), corresponds to 22 µm (0.9 mil) as measured on a smooth test panel
    • Minimum thickness for a closed film is 15 µm (0.6 mil) measured on a smooth test panel
    • Dust quantity on the surface to be coated must not exceed rating "1" for dust size class "3", "4" or "5" (ISO 8502-3-2017)
    • Lower dust size classes (“1” and/or “2”) to be removed if visible without magnification

     

    Substrate Temperature


    • Substrate temperature during automatic application should be between 25°C (77°F) and 35°C (95°F)
    • Substrate temperature during application and curing should be at least 3°C (5°F) above dew point
    • Ambient temperature during application should be at least 5°C (41°F)

    Note:

    • Substrate temperatures of > 35°C (95°F) during application increases the risk of dry spray, and is therefore not recommended

    Secondary Surface Preparation


    • During storage and construction, contamination of the prefabrication primer should be limited
    • After fabrication, surface defects should be treated according to the scheme hereafter
    • Where two possible surface treatments are indicated, the choice of treatment is dependent on the location and on the system to be applied (see table below)
    • The preferred pre-treatment for optimal results is shown; other possibilities are indicated in brackets

    Secondary Surface Preparation
    AreaImmersed Exposure ConditionsAtmospheric Exposure Conditions
    ContaminationTo be removedTo be removed
    WeldseamsISO 8501-3 grade P2 and cleanliness ISO Sa 2 ½ (SPSS-Pt3)SPSS-Pt2
    BurnedISO 8501-3 grade P2 and cleanliness ISO Sa 2 ½ (SPSS-Pt3)SPSS-Ss (SPSS-Pt2)
    Damaged corrodedISO 8501-3 grade P2 and cleanliness ISO Sa 2 ½ (SPSS-Pt3)SPSS-Ss (SPSS-Pt2)
    White rustISO 8501-3 grade P2 and cleanliness ISO Sa 2 ½ (SPSS-Pt3)SPSS-ID Pt1 (SCAP)

    Notes:

    • Cleaning by silicon carbide impregnated abrasive pad - Dust quantity rating "1" for dust size class "3", "4" or "5", lower dust size classes to be removed if visible on the surface to be coated without magnification (ISO 8502-3)
    • The back of welded plate may show discoloration (especially on plate where fillets have been welded on), this is not to be confused with burned areas and does not require special treatment
    • Burned through areas may be present (this happens especially when welding thin steel) and these should then be treated as per 'burned areas' above

    Application


    Instructions for Use

    Mixing ratio by volume: binder to paste 66.7:33.3 (2:1)

    • The temperature of the mixed base and hardener should preferably be above 15°C (59°F)
    • Stir the paste thoroughly before adding the binder
    • Gradually add one-third of the binder to the pigment paste
    • Stir thoroughly until homogeneous
    • Add remaining binder and continue stirring until the mixture is homogeneous
    • Strain the mixture through a 30–60 mesh screen
    • Mixed paint is ready for use
    • Some addition of thinner (THINNER 90-53) might be necessary depending on routing, line speed and steel temperature
    • Agitate continuously during application

     

    Air Spray


    Recommended thinner

    Volume of thinner

    • 0 - 5%

    Nozzle orifice

    • 1.0 - 1.5 mm (approx. 0.040 - 0.060 in)

    Nozzle pressure

    • 0.3 MPa (approx. 3 Bar; 44 p.s.i.)

     

    Airless Spray


    Recommended thinner

    • Thinner 90-53

    Volume of thinner

    • 0 - 5%

    Nozzle orifice

    • Approx. 0.43 – 0.53 mm (0.017 – 0.021 in)

    Nozzle pressure

    • 8.0 - 12.0 MPa (approx. 80 - 120 bar; 1161 - 1741 p.s.i.)

     

    Cleaning Solvent


    • Thinner 90-53

    Curing Times


    Curing time for DFT up to 18 µm (0.7 mil)


    Substrate temperatureDry to HandleFull Cure
    20°C (68°F)6 minutes3 days
    30°C (86°F)4 minutes48 hours

    Notes:

    • Curing times valid for a Relative Humidity (RH) of > 50 %
    • Relative humidity of < 50 % will reduce curing speed and increase time to full cure
    • At temperatures below 5°C (41°F) curing will be limited and time to full cure will increase
    • Longer drying times may be necessary at higher DFT and under unfavorable atmospheric conditions
    • Processing (bending, welding, etc.) and overcoating of coated steel plates is only recommended when SIGMAWELD 190 is fully cured
    • Degree of curing can be checked by MEK-rub test (ASTM 4752). Full cure is achieved when the coating surface is not affected by the solvent

    Safety Precautions


    • For paint and recommended thinners, see information sheets information sheet 1430, information sheet 1431 and the relevant Material Safety Data Sheets in the attachments section above
    • This is a solvent-borne paint and care should be taken to avoid inhalation of spray mist or vapor, as well as contact between the wet paint and exposed skin or eyes

    References


    Product Details
    3937-514896

    Data sheet

    Manufacturer
    PPG
    Single, Two or Three Pack
    Two-Pack
    Parts
    Two
    Base Type
    Low zinc (ethyl) silicate
    Solvent
    Solvent-borne
    Mixing Ratio
    2:1
    Suitable Substrates
    Steel
    Key Features
    Provides regular, smooth weld seams, fast-drying, suitable for automatic application on shot blasted steel plates
    Application
    Spray
    Touch Dry (at 20°C)
    -
    Dry to Handle (at 20°C)
    6 minutes
    Dry to Recoat (at 20°C)
    Minimum: 3 days. Maximum: 6 months
    Fully Cured (at 20°C)
    3 days
    Pot Life (at 20°C)
    24 hours
    Coverage
    13.9 m²/I for 18 µm (573 ft²/US gal for 0.7 mils)
    Recommended Thinner/Cleaner
    PPG Thinner 90-53
    Unit Contents
    -
    Compatible Primers
    PPG Thinner 90-53
    Compatible Topcoats
    -
    Max. Application Temperature
    35°C (95°F)
    Min. Application Temperature
    25°C (77°F)
    Density
    1.2 kg/I (10.0 lb/US gal)
    Solids by Volume
    25 ± 2%
    Heat Resistance (up-to)
    -
    VOC
    Directive 1999/13/EC, SEO: max. 552.0 g/kg max. 680.0 g/I (approx. 5.7 lb/US gal)
    Shelf Life (Once Opened)
    Binder: at least 9 months when stored cool and dry. Paste: at least 12 months when stored cool and dry
    UN Number (Activator)
    UN1263
    UN Number (Base)
    UN1263
    Base Type
    Low Zinc (Ethyl) Silicate
    Base Type
    Solvent-Based
    Suitable For Use On
    Steel
    Finish
    Flat
    Application Method
    Spray
    Usages
    Immersion
    Usages
    Zinc Silicate
    Usages
    Atmospheric
    Usages
    Weldable
    Product Usage Type
    Primer
    Product Range
    SigmaWeld
    Colour Family
    Brown
    Dry to Recoat (@ 20-25°C)
    3 days
    Attachments
    Download


    Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.


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    IMPORTANT SHIPPING & DELIVERY INFORMATION

    PPG SigmaWeld 190 is only available with the shipping and delivery timescales listed below - please do not contact our Customer Support Team with enquiries about alternative or earlier shipping and delivery times.

    Saturdays and Sundays, as well as Bank Holidays, are not classed as working days.

    Orders placed after the cut-off for this product will not be processed for earliest dispatch until 9am the next working day.

    All delivery costs below are excluding VAT


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