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PPG SigmaCover 435, two-component, high-build, micaceous iron oxide-pigmented, polyamide-cured recoatable epoxy coating. Used as a buildcoat or finish in protective coating systems, for steel and concrete structures exposed to atmospheric land or marine conditions, curing at temperatures down to -10°C (14°F).
- A high relative humidity (maximum 95%) during application and curing does not influence the quality of the coating
- Good adhesion on most aged, sound alkyd, chlorinated rubber and epoxy coatings, and can be recoated with various two-component and conventional coatings, even after long weathering periods
- Excellent durability; Tough, with long-term flexibility, and resistant to water and splash of mild chemicals
- Eggshell finish - Easy application, both by airless spray and brush
- No induction time - 5 hours pot life - fully cured after 4 days (at 20°C (68°F))
- See below for more information on surface preparation, application details and curing times
PPG SigmaCover 435 is a two-component, high-build, micaceous iron oxide-pigmented, polyamide-cured recoatable epoxy coating. The general-purpose epoxy buildcoat or finish is used in protective coating systems, for steel and concrete structures exposed to atmospheric land or marine conditions, curing at temperatures down to -10°C (14°F), and has good adhesion on most aged, sound alkyd, chlorinated rubber and epoxy coatings. SigmaCover 435 can be recoated with various two-component and conventional coatings, even after long weathering periods.
Features & Benefits
- General-purpose epoxy buildcoat or finish in protective coating systems, for steel and concrete structures exposed to atmospheric land or marine conditions
- Easy application, both by airless spray and brush
- Cures even at temperatures down to -10°C (14°F)
- A high relative humidity (maximum 95%) during application and curing does not influence the quality of the coating
- Good adhesion on most aged, sound alkyd, chlorinated rubber and epoxy coatings
- Can be recoated with various two-component and conventional coatings, even after long weathering periods
- Resistant to water and splash of mild chemicals
- Excellent durability
- Tough, with long-term flexibility
- No induction time
- 6 hours pot life
- Touch dry in 3 hours
- Fully cured after 7 days
- Can be applied by air spray, brush or roller
- See below for more information on surface preparation, application details and curing times
Reference | Colour | Size | Gloss Level |
---|---|---|---|
153150 | Dark Grey (Sigma 9558) | 4 litres | Eggshell |
179024 | Light Grey (Sigma 9553) | 4 litres | Eggshell |
179025 | Light Grey (Sigma 9553) | 20 litres | Eggshell |
Product Data
Two-component, high-build, micaceous iron oxide-pigmented, polyamide-cured recoatable epoxy coating
Data for mixed product at 20°C (68°F) | |
---|---|
Number of components | Two |
Mass density | 1.4 kg/l (11.7 lb/US gal) |
Volume solids | 63 ± 2% |
VOC (Supplied) | Directive 1999/13/EC, SED: max. 241.0 g/kg |
UK PG 6/23(92) Appendix 3: max. 344.0 g/l (approx. 2.9 lb/US gal) | |
Temperature resistance (Continuous) | To 200°C (390°F) |
Recommended dry film thickness | 75 - 150 µm (3.0 - 6.0 mils) depending on system |
Theoretical spreading rate | 6.3 m²/l for 100 µm (253 ft²/US gal for 4.0 mils) |
Dry to touch | 2 hours |
Overcoating Interval | Minimum: 3 hours |
Maximum: Extended | |
Full cure after | 4 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)
- Steel with approved zinc silicate shop primer; pre-treated according to SPSS or power tool cleaned to SSPC SP3 (SPSSPt3)
- Previous coat must be sound, dry and free from any contamination
Substrate Temperature & Application Conditions
- 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 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 be above 10°C (50°F), otherwise extra thinner may be required to obtain application viscosity
- Thinner should be added after mixing the components
- Adding too much thinner results in reduced sag resistance
Induction Time
None.
Pot life
- 5 hours at 20°C (68°F)
Refer below for more information
Air Spray
Recommended thinner
- THINNER 91-92
Volume of thinner
- 10 - 15%, depending on required thickness and application conditions
Nozzle orifice
- 2.0 – 3.0 mm (approx. 0.079 – 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 – 0.58 mm (0.019 – 0.023 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
Spreading Rate and Film Thickness
DFT | Theoretical spreading rate |
---|---|
75 µm (3.0 mils) | 8.4 m²/l (337 ft²/US gal) |
100 µm (4.0 mils) | 6.3 m²/l (253 ft²/US gal) |
150 µm (6.0 mils) | 4.2 m²/l (168 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... | Interval | -5°C (23°F) | 5°C (41°F) | 10°C (50°F) | 20°C (68°F) | 30°C (86°F) | 40°C (104°F) |
---|---|---|---|---|---|---|---|
PPG VIKOTE 46, SIGMADUR 550, SIGMARINE 40 | Minimum | 3 days | 24 hours | 16 hours | 8 hours | 5 hours | 3 hours |
Maximum | Unlimited | Unlimited | Unlimited | Unlimited | Unlimited | Unlimited | |
SIGMACOVER 435 and SIGMACOVER 456 | Minimum | 36 hours | 10 hours | 4 hours | 3 hours | 2 hours | 2 hours |
Maximum | Unlimited | Unlimited | Unlimited | Unlimited | Unlimited | Unlimited |
Notes:
- Surface should be dry and free from chalking and contamination
- SIGMACOVER 435 should not be overcoated with coal tar epoxy coatings
Curing time for DFT up to 150 µm (6.0 mils)
Substrate temperature | Dry to Handle | Full Cure |
---|---|---|
-10°C (14°F) | 24 hours - 48 hours | 20 days |
-5°C (23°F) | 24 hours - 30 hours | 14 days |
0°C (32°F) | 18 hours - 24 hours | 10 days |
5°C (41°F) | 18 hours | 8 days |
10°C (50°F) | 12 hours | 6 days |
15°C (59°F) | 8 hours | 5 days |
20°C (68°F) | 6 hours | 4 days |
30°C (86°F) | 4 hours | 3 days |
40°C (104°F) | 3 hours | 48 hours |
Notes:
- Adequate ventilation must be maintained during application and curing (please refer to information sheets 1433 and (1434)
- In exceptional cases SIGMACOVER 435 may be applied at lower substrate temperatures (down to -15°C (5°F)) provided that the surface is free from ice and other contamination. In such cases special care must be taken to avoid thick film application as this may lead to checking/crazing or solvent entrapment. It should be clear that application at lower temperatures will require additional thinning to obtain application viscosity, however this will affect the sag resistance of the applied coating and can induce solvent retention. Optimal curing and designed product properties will only be achieved when minimum required substrate temperature is reached
Pot Life (at application viscosity)
Mixed product temperature | Pot life |
---|---|
10°C (50°F) | 12 hours |
20°C (68°F) | 5 hours |
30°C (86°F) | 4 hours |
40°C (104°F) | 2 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)
Data sheet
- Manufacturer
- PPG
- For Use By
- Professional Use
- Interior / Exterior Use
- Exterior Use
- Water / Solvent Based
- Solvent
- For Use On
- Steel, concrete
- Application Method
- Brush, roller, spray
- Sheen
- Eggshell
- Colour
- Standard / Ready Mixed
- Single, Two or Three Pack
- Two-Pack
- Pack Size
- 4L
- Solvent
- Epoxy
- Mixing Ratio
- 82:18
- Key Features
- Cures even at temperatures down to -10°C (14°F)
- Touch Dry (at 20°C)
- -
- Dry to Handle (at 20°C)
- 6 hours
- Dry to Recoat (at 20°C)
- 3 hours (see tables)
- Fully Cured (at 20°C)
- 4 days
- Pot Life (at 20°C)
- 5 hours
- Coverage
- 6.3 m²/l for 100 µm
- Recommended Thinner/Cleaner
- THINNER 91-92/THINNER 90-53
- Unit Contents
- Base & hardener
- Compatible Primers
- -
- Compatible Topcoats
- -
- Max. Application Temperature
- -
- Min. Application Temperature
- -10°C (14°F)
- Density
- 1.4 kg/l (11.7 lb/US gal)
- Solids by Volume
- 63 ± 2%
- Heat Resistance (up-to)
- 200°C (390°F)
- VOC
- Directive 1999/13/EC, SED: max. 241.0 g/kg UK PG 6/23(92) Appendix 3: max. 344.0 g/l (approx. 2.9 lb/US gal)
- Shelf Life (from date of manufacture)
- 24 months
- UN Number
- UN1263
- Colour(s)
- Standard Colours
- Base Type
- Solvent-Based
- Suitable For Use On
- Zinc Silicate Shopprimer
- Finish
- Eggshell
- Application Method
- Brush
- Application Method
- Spray
- Application Method
- Roller
- Usages
- MIO
- Product Usage Type
- Topcoat
- Product Range
- SigmaCover
- Colour Family
- Red
- Colour Family
- Grey
- Dry to Recoat (@ 20-25°C)
- 3 hours
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IMPORTANT SHIPPING & DELIVERY INFORMATION
PPG SigmaCover 435 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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