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PPG Sigmacover 256 - Zinc Phosphate Epoxy Primer
  • PPG Sigmacover 256 - Zinc Phosphate Epoxy Primer

PPG Sigmacover 256 - Zinc Phosphate Epoxy Primer

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£59.91
Tax excluded
£71.89 Tax incl.

PPG Sigmacover 256  is a two-component, high-build, polyamide-cured recoatable zinc phosphate epoxy primer or buildcoat in protective coating systems, for steel and concrete structures in atmospheric exposure

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PPG Sigmacover 256  is a two-component, high-build, polyamide-cured recoatable zinc phosphate epoxy primer or buildcoat in protective coating systems, for steel and concrete structures in atmospheric exposure

Features

  • Suitable for atmospheric industrial and marine applications
  • Can be recoated with various two-component and conventional coatings, even after long weathering periods
  • Lead- and chromate free
  • Excellent rust preventing properties in industrial or coastal atmospheres
  • Tough, with long-term flexibility
  • Cures even at temperatures down to -10°C (14°F)
  • Good adhesion to steel, galvanized steel and aged epoxy coatings
  • Easy application, both by airless spray and brush
  • Can be used as epoxy primer/finish (for dry internal areas)

Recommended Substrates and Temperatures

Substrate Conditions

  • Steel; blast cleaned to ISO-Sa2½, blasting profile 40 – 70 µm (1.6 – 2.8 mils)
  • Shop primed steel; pretreated to SPSS-Pt3 / SSPC-SP3
  • Galvanized steel must be sweep blasted until an even flat appearance (only for internal dry exposure conditions)
  • Aged suitable coating must be dry and free from any contamination

Substrate Temperature

  • Substrate temperature during application and curing down to -10°C (14°F) is acceptable; provided the substrate is free from ice and dry
  • Substrate temperature during application should be at least 3°C (5°F) above dew point
  • Relative humidity during application and curing should not exceed 95%

Instructions For Use

Mixing ratio by volume: base to hardener 82:18

  • The temperature of the mixed base and hardener 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

Application

Air spray

Recommended thinner

THINNER 91-92

Volume of thinner

10 - 15%, depending on required thickness and application conditions

Nozzle orifice

1.5 – 3.0 mm (approx. 0.060 – 0.110 in)

Nozzle pressure

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

Airless spray

Recommended thinner

THINNER 91-92

Volume of thinner

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

Nozzle orifice

Approx. 0.48 mm (0.019 in)

Nozzle pressure

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

Brush/roller

Recommended thinner

THINNER 91-92

Volume of thinner

0 – 5%

Cleaning solvent

THINNER 90-53

PPG Paints
PPG-SC256

Specific References

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PPG Sigmacover 256 - Zinc Phosphate Epoxy Primer

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PPG Sigmacover 256 - Zinc Phosphate Epoxy Primer

PPG Sigmacover 256 - Zinc Phosphate Epoxy Primer

£59.91
Tax excluded
£71.89 Tax incl.