New Guard Coatings

PPG SigmaCover 522

PPG SigmaCover 522

A two-component, micaceous iron oxide-pigmented, polyamide-cured epoxy primer/sealer/coating for weathered-, cleaned-, zinc-rich primers and metal-sprayed steel. Resistant to high temperatures up to 200°C (390°F) in dry atmospheric exposure conditions.

 

PPG LogoPPG SigmaCover 522

PPG SigmaCover 522 is a two-component, micaceous iron oxide-pigmented, polyamide-cured epoxy primer/sealer/coating for weathered, cleaned, zinc-rich primers and metal-sprayed steel. Resistant to high temperatures up to 200°C (390°F) in dry atmospheric exposure conditions.

 

Product Features and Benefits

  • Excellent adhesion to, and sealing of, weathered-, cleaned-, zinc-rich primers and metal-sprayed steel
  • Good adhesion to properly pre-treated galvanised steel
  • Can be used in systems for atmospheric or water-immersed exposure conditions
  • Good resistance to industrial- or chemical-contaminated atmospheric exposure conditions
  • Good abrasion and impact resistance
  • Pass cryogenic cyclic test from -196°C (-321°F) to 140°C (284°F)
  • Resistant to temperatures up to 200°C (390°F) in dry atmospheric exposure conditions
  • Prevents Corrosion Under Insulation (CUI)
  • Colours: Redbrown, greenish grey
  • Gloss level: Low metallic sheen

 

Method of Application

  • Air spray
  • Airless spray
  • Brush/Roller

Note:

Adequate ventilation must be maintained during application and curing (please refer to Information Sheets 1433 and 1434 available on request).

For optimum resistance in tank coating systems a minimum substrate temperature of 10°C (50°F) is essential.

Please refer to the product Data Sheet for further surface preparation, mixing and application instructions or contact us for free technical advice.

 

Overcoating

Please contact us for suitable products for overcoating PPG SigmaCover 522.

Note:

  • Surface should be dry and free from any contamination
  • The minimum overcoating time should be multiplied by 5 when SigmaCover 522 is to be applied on top of an existing old (alkyd) primer or coating
  • Surface should be properly cleaned
  • Glossy finishes require a corresponding undercoat

 

Thinner

Air Spray: PPG Thinner 91-92
Volume of Thinner: 10 – 30% depending on required thickness and application conditions.

Airless Spray: PPG Thinner 91-92
Volume of Thinner: 5 – 10%, 30 – 40 % when mist coat applied.

Brush/Roller: PPG Thinner 91-92
Volume of Thinner: 0 – 5%

Refer to product Data Sheet for further details.

 

Cleanup

Please contact us for suitable cleaning solutions for PPG SigmaCover 522.

 

Safety Precautions

  • Adequate ventilation must be maintained during application and curing (please refer to Information Sheets 1433 and 1434)
  • For paint and recommended thinners see Information Sheets 1430, 1431 and relevant Material Safety Data Sheets
  • This is a solvent-borne paint and care should be taken to avoid inhalation of spray mist or vapour, as well as contact between the wet paint and exposed skin or eyes

Please refer to the product Data Sheet and Material Safety Data Sheets for full details regarding the safe use of this product.

 

Contact Us

For further advice regarding the use of this product, technical support or a quotation please contact us.

Basic Data at 20°C (68°F) for mixed product:

Number of components Two
Mass density 1.8 kg/l (15.0 lb/US gal)
Volume solids 60±2%
VOC (Supplied) Directive 1999/13/EC, SED: max. 210.0 g/kg max. 374.0 g/l (approx. 3.1 lb/US gal)
Recommended dry film thickness 40 – 100 μm (1.6 – 4.0 mils) depending on system
Theoretical spreading rate 15.0 m2/l for 40 μm (602 ft2/US gal for 1.6 mils) 6.0 m2/l for 100 μm (241 ft2/US gal for 4.0 mils)
Dry to touch 2 hours
Overcoating Interval Minimum: 8 hours; Maximum: 1 month
Full cure after 7 days
Shelf life Base: at least 24 months when stored cool and dry. Hardener: at least 24 months when stored cool and dry
Pot life 8 hours at 20°C (68°F)

Please refer to the Data Sheet for additional technical data.

Download Datasheet