PPG SigmaShield 420

    7951

    We no longer stock this product; please contact our technical team on 0113 2455450 (option 2) or send a message to [email protected] where we will be happy to find an alternative product.

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    This Product has been Discontinued

    Description

    We no longer stock this product; please contact our technical team on 0113 2455450 (option 2) or send a message to [email protected] where we will be happy to find an alternative product.

    SigmaShield 420 is a two-component reinforced high solids polyamine adduct cured epoxy coating coating for cargo tanks of bulk or oil carriers and storage tanks, with excellent abrasion and impact resistance and outstanding (sea)water resistance.

    A buildcoat for underwater and boottop systems, SigmaShield 420 has no induction time and a pot life of 1.5 hours - refer further below for more details on application, including spreading rate and film thickness, overcoating intervals and curing times.



    Features & Benefits


    • More colours available on request - contact our sales team on 0113 2455450 for more details
    • Coating for cargo tanks of bulk, or oil carriers and storage tanks
    • Buildcoat for underwater and boottop systems
    • Excellent abrasion and impact resistance
    • Outstanding (sea)water resistance
    • Apply by sprayer, brush or roller
    • Overcoat after a minimum of 3.5 hours (at 20°C)
      • For full cure for hard angular cargoes, please contact our technical team on 0113 2455450
      • Refer below for recommended thinners and more application details and drying times
    • Two-component
    • Reinforced high solids polyamine adduct cured epoxy
    • Easy to clean
    • No induction time
    • 1.5 hours pot life
    • Used at Diana Shipping Inc, a global provider of shipping transportation services with a fleet consisting of 50 dry bulk vessels with a combined carrying capacity of its fleet is approximately 5.8 million dwt



    Product Data


    Two-component, reinforced high solids polyamine adduct cured epoxy coating.

    Data for mixed product
    Number of componentsTwo
    Mass density1.6 kg/l (13.4 lb/US gal)
    Volume solids81 ± 2%
    VOC (Supplied)Directive 1999/13/EC, SED: max. 153.0 g/kg
    UK PG 6/23(92) Appendix 3: max. 239.0 g/l (approx. 2.0 lb/US gal)
    Recommended dry film thickness125 - 200 µm (5.0 - 8.0 mils) depending on system
    Theoretical spreading rate5.4 m²/l for 150 µm (217 ft²/US gal for 6.0 mils)
    4.1 m²/l for 200 µm (162 ft²/US gal for 8.0 mils)
    Dry to touch3 hours
    Overcoating IntervalMinimum: 3.5 hours
    Maximum: 14 days
    Full cure after5 days
    Shelf lifeBase: at least 24 months when stored cool and dry
    Hardener: at least 24 months when stored cool and dry

    Notes:

    Refer below for more details on spreading rate and film thickness, overcoating intervals and curing times



    Surface Preparation


    Recommended Substrate Conditions and Temperatures

    Substrate conditions

    • Previous coat must be dry and free from any contamination

    Substrate temperature and application conditions

    • Substrate temperature during application and curing should be at least 3°C (5°F) above dew point
    • Substrate temperature during application and curing down to 5°C (41°F) is acceptable



    Application


    Instructions for Use

    Mixing ratio by volume: base to hardener 75:25 (3:1)

    • The temperature of the paint should preferably be above 15°C (59°F), otherwise extra thinner may be required to obtain application viscosity
    • Adding too much thinner results in reduced sag resistance and slower cure
    • Thinner should be added after mixing the components

     

    Air Spray


    Recommended thinner

    Volume of thinner

    • 5 - 10%, depending on required thickness and application conditions

    Nozzle orifice

    • 1.7 – 2.0 mm (approx. 0.070 – 0.079 in)

    Nozzle pressure

    • 0.3 - 0.4 MPa (approx. 3 - 4 bar; 44 - 58 p.s.i.)

     

    Airless Spray


    Recommended thinner

    Volume of thinner

    • 0 - 10% for a DFT of 100 µm (4.0 mils); 0 - 5% for a DFT of 200 µm (8.0 mils)

    Nozzle orifice

    • Approx. 0.53 – 0.69 mm (0.021 – 0.027 in)

    Nozzle pressure

    • 15.0 MPa (approx. 150 bar; 2176 p.s.i.)

     

    Brush/roller


    Recommended thinner

    Volume of thinner

    • 0 – 5%

    Cleaning solvent

     

    Spreading Rate and Film Thickness


    Theoretical spreading rate

    DFTTheoretical Spreading Rate
    100 µm (4.0 mils)8.1 m²/l (325 ft²/US gal)
    150 µm (6.0 mils)5.4 m²/l (217 ft²/US gal)
    175 µm (7.0 mils)4.6 m²/l (186 ft²/US gal)
    200 µm (8.0 mils)4.1 m²/l (162 ft²/US gal)

    • Note: Maximum DFT when brushing: 75 µm (3.0 mils)

     

    Overcoating Interval for DFT up to 150 µm (6.0 mils)


    Overcoating with...Interval5°C (41°F)10°C (50°F)20°C (68°F)30°C (86°F)40°C (104°F)
    Epoxy coatingsMinimum14 hours7 hours3.5 hours2 hours1.5 hours
    Maximum28 days28 days14 days7 days4 days
    PolyurethanesMinimum22 hours14 hours10 hours6 hours4 hours
    Maximum28 days28 days14 days7 days4 days

    • Note: Surface should be dry and free from any contamination

     

    Curing Time for DFT up to 150 µm (6.0 mils)


    Substrate temperatureDry to handleService- water immersionFull cure
    5°C (41°F)15 hours10 days17 days
    10°C (50°F)8 hours7 days14 days
    20°C (68°F)3.5 hours5 days7 days
    30°C (86°F)2 hours4 days5 days
    40°C (104°F)1.5 hours3 days3 days

    Notes:

    • For cargo hold application: for full cure for hard angular cargoes, please contact our technical team on 0113 2455450.
    • Should SigmaShield 420 or the total coating system (2 x 125 µm/2 x 5.0 mils) be applied in excess of the specified dry film thickness, then the time necessary to reach full cure will be increased
    • Adequate ventilation must be maintained during application and curing (please refer to information sheets 1433 and 1434)

     

    Pot Life (at application viscosity)


    Mixed product temperaturePot life
    10°C (50°F)3 hours
    20°C (68°F)1.5 hours
    30°C (86°F)45 minutes



    Safety Precautions


    • For paint and recommended thinners, see the relevant Material Safety Data Sheets 1433 and 1434
    • 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
    7951

    Data sheet

    Manufacturer
    PPG
    For Use On
    Steel
    Application Method
    Brush, Roller, Spray
    Sheen
    Gloss
    Colour
    Standard / Ready Mixed
    Single, Two or Three Pack
    Two-Pack
    Pack Size
    20L
    Parts
    Two
    Base Type
    Polyamine adduct cured epoxy
    Solvent
    Solvent-borne
    Mixing Ratio
    3:1
    Suitable Substrates
    Steel: cargo tanks, oil carriers
    Key Features
    Excellent abrasion and impact resistance, outstanding seawater resistance, gloss finish
    Application
    Brush, Roller, Spray
    Touch Dry (at 20°C)
    3 hours
    Dry to Handle (at 20°C)
    3.5 hours
    Dry to Recoat (at 20°C)
    Minimum: 3.5 hours. Maximum: 14 days
    Fully Cured (at 20°C)
    After 5 days
    Pot Life (at 20°C)
    1.5 hours
    Coverage
    5.4 m2/I for 150 µm (217 ft2/US gal for 6.0 mils). 4.1 m2/I for 200 µm (162 ft2/US gal for 8.0 mils)
    Recommended Thinner/Cleaner
    PPG Thinner 91-92, PPG Thinner 90-53
    Unit Contents
    -
    Compatible Primers
    -
    Compatible Topcoats
    -
    Max. Application Temperature
    -
    Min. Application Temperature
    At least 3°C (5°F) above dew point
    Density
    1.6 kg/I (13.4 lb/US gal)
    Solids by Volume
    81 ±2%
    Heat Resistance (up-to)
    -
    VOC
    Directive 1999/13/EC, SED: max. 153.0 g/kg. UK PG 6/23(92) Appendix 3: max. 239.0 g/I (approx. 2.0 lb/US gal)
    Shelf Life (Once Opened)
    Base/Hardener: at least 24 months when stored cool and dry
    UN Number (Activator)
    UN3469
    Brand
    PPG
    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 SigmaShield 420 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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