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PPG SigmaCover 522 is a two-component, micaceous iron oxide-pigmented, polyamide-cured epoxy primer/sealer/coating. It has excellent adhesion to, and sealing of, weathered, cleaned, zinc-rich primers and metal-sprayed steel, with good adhesion to properly pre-treated galvanized steel.
- Can be used in systems for atmospheric or water-immersed exposure conditions, with good resistance to industrial - or chemical-contaminated atmospheric exposure conditions
- Good abrasion and impact resistance - Prevents Corrosion Under Insulation (CUI)
- 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
- No induction time - 8 hours pot life - Touch dry in 2 hours - Fully cured after 7 days
Description
PPG SigmaCover 522 is a two-component, micaceous iron oxide-pigmented, polyamide-cured epoxy primer/sealer/coating. It has excellent adhesion to, and sealing of, weathered, cleaned, zinc-rich primers and metal-sprayed steel, with good adhesion to properly pre-treated galvanized steel.
Features & Benefits
- Two-component, micaceous iron oxide-pigmented, polyamide-cured epoxy primer/sealer/coating
- Can be used in systems for atmospheric or water-immersed exposure conditions
- Excellent adhesion to, and sealing of, weathered, cleaned, zinc-rich primers and metal-sprayed steel
- Good adhesion to properly pre-treated galvanized steel
- Good resistance to industrial or chemical-contaminated atmospheric exposure conditions
- Good abrasion and impact resistance
- Prevents Corrosion Under Insulation (CUI)
- 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
- No induction time
- 8 hours pot life
- Touch dry in 2 hours
- Fully cured after 7 days
- See below for more information on surface preparation, application details and curing times
| Reference | Colour | Size | Gloss Level |
|---|---|---|---|
| 179509 | Greenish Grey | 4 litres | Low metallic sheen |
| 179510 | Greenish Grey | 20 litres | Low metallic sheen |
| - | RedBrown | 4 litres | Low metallic sheen |
| - | RedBrown | 20 litres | Low metallic sheen |
Product Data
Two-component, micaceous iron oxide-pigmented, polyamide-cured epoxy primer/sealer/coating
| Data for mixed product at 20°C (68°F) | |
|---|---|
| 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 | |
Notes:
- See below for more information on surface preparation, application details and curing times
Surface Preparation
Recommended Substrate Conditions and Temperatures
Substrate conditions
- Steel;
- Blast cleaned to ISO-Sa2½, blasting profile 40 – 70 µm (1.6 – 2.8 mils)
- Shop primed steel;
- Sweep blasted to SPSS-Ss or power tool cleaned to SPSS-Pt3
- Zinc rich epoxies and zinc silicates must be dry and free from any contamination
- Galvanized steel;
- For atmospheric exposure conditions disc sanding, and for water immersed exposure conditions sweep blasting is required
- Stainless steel, non-ferrous metal should be sufficiently roughened by light sanding
- Compatible previous coat must be dry and free from any contamination
- When used as an adhesion primer or when a long overcoating interval is expected a maximum DFT of 50 µm (2.0 mils) must be specified in order to preserve the rough texture
Substrate Temperature & Application Conditions
- Substrate temperature during application and curing should be above 10°C (50°F)
- Ambient temperature during application at 5°C (41°F) is acceptable; however curing to hardness takes longer and complete cure will be reached when the temperature increases
- Substrate temperature during application and curing should be at least 3°C (5°F) above dew point
Application
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
- Thinner should be added after mixing the components
Induction Time
None.
Pot life
- 8 hours at 20°C (68°F)
Refer below for more information
Air Spray
Recommended thinner
- THINNER 91-92
Volume of thinner
- 10 - 30%, depending on required thickness and application conditions
Nozzle orifice
- 1.5 – 2.0 mm (approx. 0.060 – 0.079 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%, 30 - 40% when mist coat applied
Nozzle orifice
- Approx. 0.48 – 0.53 mm (0.019 – 0.021 in)
Nozzle pressure
- 12.0 - 15.0 MPa (approx. 120 - 150 bar; 1741 - 2176 p.s.i.)
Brush/roller
Recommended thinner
- THINNER 91-92
Volume of thinner
- 0 – 5%
Spreading Rate and Film Thickness
| DFT | Theoretical spreading rate |
|---|---|
| 40 µm (1.6 mils) | 15.0 m²/l (602 ft²/US gal) |
| 100 µm (4.0 mils) | 6.0 m²/l (241 ft²/US gal) |
Overcoating interval for DFT up to 50 µm (2.0 mils)
| Overcoating with... | Interval | 5°C (41°F) | 10°C (50°F) | 20°C (68°F) | 30°C (86°F) | 40°C (104°F) |
|---|---|---|---|---|---|---|
| Two-component epoxies and polyurethanes | Minimum | 36 hours | 16 hours | 8 hours | 6 hours | 4 hours |
| Maximum | 6 months | 6 months | 6 months | 3 months | 3 months |
Overcoating interval for DFT up to 100 µm (4.0 mils)
| Overcoating with... | Interval | 5°C (41°F) | 10°C (50°F) | 20°C (68°F) | 30°C (86°F) | 40°C (104°F) |
|---|---|---|---|---|---|---|
| Two-component epoxies and polyurethanes | Minimum | 3 days | 32 hours | 16 hours | 12 hours | 8 hours |
| Maximum | 28 days | 28 days | 28 days | 14 days | 7 days |
Notes:
- 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
Curing time for DFT up to 100 μm (4.0 mils)
| Substrate temperature | Dry to touch | Dry to Handle | Full Cure |
|---|---|---|---|
| 5°C (41°F) | 8 hours | 18 hours | N/A |
| 10°C (50°F) | 5 hours | 8 hours | 15 days |
| 15°C (59°F) | 3.5 hours | 6 hours | 10 days |
| 20°C (68°F) | 2 hours | 4 hours | 7 days |
| 25°C (77°F) | 1.5 hours | 4 hours | 5 days |
Notes:
- Adequate ventilation must be maintained during application and curing (please refer to information sheets 1433 and (1434)
- For optimum resistance in tank coating systems a minimum substrate temperature of 10°C (50°F) is essential
Pot Life (at application viscosity)
| Mixed product temperature | Pot life |
|---|---|
| 15°C (59°F) | 10 hours |
| 20°C (68°F) | 8 hours |
| 25°C (77°F) | 6 hours |
| 30°C (86°F) | 5 hours |
| 35°C (95°F) | 4 hours |
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
- Conversion Tables (information sheet 1410)
- Explanation to product data sheets (information sheet 1411)
- Safety Indicators (information sheet 1430)
- Safety in Confined Space and Health Safety, Explosion Hazard - Toxic Hazard (information sheet 1431)
- Safe Working in Confined Spaces (information sheet 1433)
- Directives for Ventilation Practice (information sheet 1434)
- Cleaning of Steel and Removal of Rust (information sheet 1490)
- Specification for Mineral Abrasives (information sheet 1491)
- Relative humidity - Substrate Temperature - Air Temperature (information sheet 1650)
Product Details
4145-534910
Data sheet
- Manufacturer
- PPG
- For Use By
- Professional Use
- Water / Solvent Based
- Solvent
- For Use On
- Steel, Galvanized steel, Stainless steel
- Application Method
- Brush, roller, spray
- Sheen
- Low Metallic Sheen
- Colour
- Standard / Ready Mixed
- Single, Two or Three Pack
- Two-Pack
- Pack Size
- 20L
- Solvent
- Epoxy
- Mixing Ratio
- 82:18
- Key Features
- Pass cryogenic cyclic test from -196°C (-321°F) to 140°C (284°F)
- Touch Dry (at 20°C)
- 2 hours
- Dry to Handle (at 20°C)
- 4 hours
- Dry to Recoat (at 20°C)
- 8 hours
- Fully Cured (at 20°C)
- 7 days
- Pot Life (at 20°C)
- 8 hours
- Coverage
- 15.0 m²/l for 40 µm/6.0 m²/l for 100 µm
- Recommended Thinner/Cleaner
- THINNER 91-92
- Unit Contents
- Base & hardener
- Compatible Primers
- -
- Compatible Topcoats
- -
- Max. Application Temperature
- -
- Min. Application Temperature
- 10°C (50°F)
- Density
- 1.8 kg/l (15.0 lb/US gal)
- Solids by Volume
- 60 ± 2%
- Heat Resistance (up-to)
- 200°C
- VOC
- Directive 1999/13/EC, SED: max. 210.0 g/kg max. 374.0 g/l (approx. 3.1 lb/US gal)
- Shelf Life (from date of manufacture)
- 24 months
- UN Number
- UN1263, UN3469
- Base Type
- Solvent-Based
- Suitable For Use On
- Steel
- Finish
- Low Metallic Sheen
- Application Method
- Roller
- Application Method
- Brush
- Application Method
- Spray
- Usages
- MIO
- Product Usage Type
- Primer & Sealer
- Product Range
- SigmaCover
- Colour Family
- Grey
- Heat Resistance
- Up To 200°C
- Dry to Recoat (@ 20-25°C)
- 8 hours
Be the first to ask a question about this product!
IMPORTANT SHIPPING & DELIVERY INFORMATION
PPG SigmaCover 522 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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