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    PPG - NovaGuard 840 - Epoxy Coating
    • PPG - NovaGuard 840 - Epoxy Coating

    PPG - NovaGuard 840 - Epoxy Coating

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    £928.70 Tax incl.

    PPG NovaGuard 840 is a two-component, solvent-free, amine-cured novolac phenolic epoxy coating suitable for heavy H2S wastewater environments. such environments include unleaded fuel tanks, particularly in aviation, with good chemical & solvent resistance, especially to crude oil up to 120°C (250°F).

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    PPG Sigma NovaGuard 840 is a two component, solvent free, amine cured, phenolic epoxy coating, designed to protect tank exteriors while reducing the potential of explosions and fires.


    • Suitable for heavy H2S wastewater environments
    • Suitable for use on primed steel or direct to concrete/masonry
    • Good visibility due to light color
    • Glossy and smooth appearance
    • Reduced explosion risk and fire hazard
    • Suitable for storage of unleaded gasolines
    • Good chemical resistance against a wide range of chemicals and solvents
    • A clear (semi-transparent) version is available for systems reinforced with chopped glass fibers or glass fibre mats
    • Excellent resistance to crude oil up to 120°C (250°F)
    • Can be applied by heavy-duty, single-feed, airless spray equipment (60:1)
    • Meets the requirements of EI 1541 2.2 (coating systems for aviation fuel storage tanks and pipes)
    • Meets NSF/ANSI Standard 61 for potable water when applied and used as described on http://info.nsf.org/

    Recommended Substrate Conditions and Temperatures

    Carbon steel

    • Steel; blast cleaned to a minimum of SSPC-SP10 or ISO-SA2½ , blasting profile 50 – 125 µm (5.0 mils) (2.0 – 5.0 mils)
    • Steel with suitable primer (NOVAGUARD 260 or PHENGUARD 930) must be dry and free from any contamination


    • Remove grease, oil and other penetrating contaminants according to ASTM D4258
    • Abrade the surface per ASTM D4259 to remove all chalk and surface glaze or laitance. Achieve surface profile - ICRI CSP 3 to 5
    • NOVAGUARD 840 with PPG 884 Additive or AMERCOAT 114A may be used as a pit filler for certain applications. 
    • Maximum recommended moisture transmission rate is 3 lbs / 1,000 ft2 / 24 hours by moisture transmission test (ASTM F1869, calcium chloride test or by ASTM D4263, plastic sheet test)
    • Moisture content should not exceed 4% (ASTM D4944, Calcuim Carbide Gas method)

    Substrate temperature and application conditions

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

    Instructions For Use 

    Mixing ratio by volume: base to hardener 80:20 (4:1)

    • The temperature of the mixed base and hardener should preferably be at least 20°C (68°F)
    • At lower temperature, the viscosity will be too high for spray application
    • No thinner should be added
    • For recommended application instructions, see working procedure

    Airless spray

    • Use heavy-duty, single-feed, airless spray equipment, preferably 60:1 pump ratio and suitable high-pressure hoses/inline heating or insulated hoses may be necessary to avoid cooling down of paint in hoses at low air temperature
    • Length of hoses should be as short as possible

    Recommended thinner

    No thinner should be added

    Nozzle orifice

    Approx. 0.53 mm (0.021 in)

    Nozzle pressure

    • At 20°C (68°F) paint temperature min. 28.0 MPa (approx. 280 bar; 4061 p.s.i.).
    • At 30°C (86°F) min. 22.0 MPa (approx. 220 bar; 3191 p.s.i.)


    • Brush: for stripe coating and spot repair only

    Recommended thinner

    No thinner should be added

    Cleaning solvent

    THINNER 90-53 or THINNER 90-83

    Notes: - Paint inside the spraying equipment must be removed before the pot life has been expired - All application equipment must be cleaned immediately after use

    PPG Paints
    PPG -NG840

    Data sheet

    3.3m²/L at 300µ
    For Use On
    Application Method
    Brush & Spray
    Recoat Time (20°c)

    Specific References

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    PPG - NovaGuard 840 - Epoxy Coating

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    PPG - NovaGuard 840 - Epoxy Coating

    PPG - NovaGuard 840 - Epoxy Coating

    Tax excluded
    £928.70 Tax incl.