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PPG SigmaDur 550, a two-component, aliphatic acrylic polyurethane finish with excellent resistance to atmospheric exposure conditions that cures at temperatures down to -5°C (23°F).
- Available in 2,600+ colours, inc. RAL, BS, NCS & the new NCS 2050 colours
- Can be recoated unlimited times
- Used on the exterior of the Padma Multipurpose Bridge in Bangladesh
- Excellent resistance to atmospheric exposure conditions
- Excellent colour and gloss retention
- Non-chalking, non-yellowing
- Resistant to splash of mineral and vegetable oils, paraffins, aliphatic petroleum products and mild chemicals
- Can be recoated even after long atmospheric exposure
- Good application properties
Product customisation
Don't forget to save your customization to be able to add to cartDescription
PPG SigmaDur 550, a two-component, aliphatic acrylic polyurethane finish with excellent resistance to atmospheric exposure conditions and is resistant to splash of mineral and vegetable oils, paraffins, aliphatic petroleum products and mild chemicals. Available in 2200+ colours from RAL, BS and NCS, the finish has excellent colour and gloss retention, is non-chalking and non-yellowing, and can be recoated unlimited times, even after long atmospheric exposure.
Features & Benefits
- Available in 2200+ colours from RAL, NCS and BS
- Can be recoated unlimited times
- Used on the exterior of the Padma Multipurpose Bridge in Bangladesh
- Excellent resistance to atmospheric exposure conditions
- Excellent colour and gloss retention
- Non-chalking, non-yellowing
- Cures at temperatures down to -5°C (23°F)
- Resistant to splash of mineral and vegetable oils, paraffins, aliphatic petroleum products and mild chemicals
- Can be recoated even after long atmospheric exposure
- Good application properties
Product Data
Two-component, aliphatic acrylic polyurethane finish
| Data for mixed product at 20°C (68°F) | |
|---|---|
| Number of components | Two |
| Mass density | 1.3 kg/l (10.8 lb/US gal) |
| Volume solids | 55 ± 2% |
| VOC (Supplied) | Directive 1999/13/EC, SED: max. 334.0 g/kg |
| max. 430.0 g/l (approx. 3.6 lb/US gal) | |
| EUR Directive: 2004/42/IIA(j)(500) 459 g/l) | |
| Recommended dry film thickness | 50 - 60 µm (2.0 - 2.4 mils) depending on system |
| Theoretical spreading rate | 11.0 m²/l for 50 µm (441 ft²/US gal for 2.0 mils) |
| Dry to touch | 1 hour |
| Overcoating Interval | Minimum: 6 hours |
| Maximum: Unlimited | |
| Full cure after | 4 days |
| Shelf life | Base: at least 36 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
- Previous coat (epoxy or polyurethane) must be dry and free from any contamination
- Previous coat: surface should be sufficiently roughened if necessary
Substrate Temperature & Application Conditions
- Substrate temperature during application at -5°C (23°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
- Relative humidity during application and curing should not exceed 85%
- Should condensation on the surface occur during, or soon after application, this could result in colour and gloss change
Application
Instructions for Use
Mixing ratio by volume: base to hardener 88:12
- 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
Volume of thinner
- 3 - 5%, depending on required thickness and application conditions
Nozzle orifice
- 1.0 - 1.5 mm (approx. 0.040 - 0.060 in)
Nozzle pressure
- 0.3 - 0.4 MPa (approx. 3 - 4 bar; 44 - 58 p.s.i.)
Airless spray
Recommended thinner
- THINNER 21-06
Volume of thinner
- 3 - 5%, depending on required thickness and application conditions
Nozzle orifice
- Approx. 0.43 – 0.48 mm (0.017 – 0.019 in)
Nozzle pressure
- 20.0 MPa (approx. 200 bar; 2901 p.s.i.)
Brush/roller
Recommended thinner
- THINNER 21-06
Volume of thinner
- 0 – 5%
Cleaning Solvent
- THINNER 90-53
Spreading Rate and Film Thickness
| DFT | Theoretical spreading rate |
|---|---|
| 50 µm (2.0 mils) | 11.0 m²/l (441 ft²/US gal) |
| 60 µm (2.4 mils) | 9.2 m²/l (368 ft²/US gal) |
Overcoating interval for DFT up to 50 µm (2.0 mils)
| Overcoating with... | Interval | -5°C (23°F) | 0°C (32°F) | 10°C (50°F) | 20°C (68°F) | 30°C (86°F) | 40°C (104°F) |
|---|---|---|---|---|---|---|---|
| Itself | Minimum | 24 hours | 16 hours | 8 hours | 6 hours | 5 hours | 3 hours |
| Maximum | Unlimited | Unlimited | Unlimited | Unlimited | Unlimited | Unlimited |
Note:
- Surface should be dry and free from any contamination
Curing time for DFT up to 60 µm (2.4 mils)
| Substrate temperature | Dry to touch | Full cure |
|---|---|---|
| -5°C (23°F) | 24 hours | 15 days |
| 0°C (32°F) | 16 hours | 11 days |
| 10°C (50°F) | 8 hours | 6 days |
| 20°C (68°F) | 6 hours | 4 days |
| 30°C (86°F) | 5 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
- Safe Working in Confined Spaces (1433) and Directives for Ventilation Practice (1434)
- Premature exposure to early condensation and rain may cause colour and gloss change
Pot Life (at application viscosity)
| Mixed product temperature | Pot life |
|---|---|
| 10°C (50°F) | 7 hours |
| 20°C (68°F) | 5 hours |
| 30°C (86°F) | 3 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
- Contains a toxic polyisocyanate curing agent
- Avoid at all times inhalation of aerosol spray mist
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)
- Relative humidity - Substrate Temperature - Air Temperature (information sheet 1650)
Product Details
4154-866390
Data sheet
- Manufacturer
- PPG
- For Use By
- Professional Use
- Application Method
- Brush, Roller, Spray
- Sheen
- Gloss
- Colour
- Fully Tintable
- Single, Two or Three Pack
- Two-Pack
- Pack Size
- 4L, 20L
- Parts
- 2
- Base Type
- Solvent
- Solvent
- Polyurethane
- Mixing Ratio
- 88:12
- Suitable Substrates
- Metal
- Key Features
- Low curing, unlimited recoats, chemical splash resistant, available in 350+ colours
- Touch Dry (at 20°C)
- 60 mins
- Dry to Handle (at 20°C)
- -
- Dry to Recoat (at 20°C)
- 6 hours
- Fully Cured (at 20°C)
- 4 days
- Pot Life (at 20°C)
- 5 hours
- Coverage
- 11.0 m²/l for 50 µm (441 ft²/US gal for 2.0 mils)
- Recommended Thinner/Cleaner
- THINNER 21-06/THINNER 90-53
- Unit Contents
- Base & hardener
- Compatible Primers
- -
- Compatible Topcoats
- -
- Max. Application Temperature
- -
- Min. Application Temperature
- 10°C (50°F)
- Density
- 1.3 kg/l (10.8 lb/US gal)
- Solids by Volume
- 55 ± 2%
- Heat Resistance (up-to)
- -
- VOC
- Directive 1999/13/EC, SED: max. 334.0 g/kg max. 430.0 g/l (approx. 3.6 lb/US gal)
- Shelf Life (from date of manufacture)
- Base: at least 36 months; Hardener: at least 24 months
- UN Number (Activator)
- UN1263
- UN Number (Base)
- UN1263
- Base Type
- Solvent-Based
- Suitable For Use On
- Steel
- Suitable For Use On
- Primed Surfaces
- Finish
- Gloss
- Application Method
- Spray
- Application Method
- Brush
- Application Method
- Roller
- Usages
- Low Temperature
- Usages
- Atmospheric
- Usages
- Gloss Retention
- Usages
- Colour Retention
- Product Usage Type
- Topcoat
- Product Range
- SigmaDur
- Colour Family
- Yellow
- Colour Family
- Black
- Colour Family
- White
- Colour Family
- Neutral
- Colour Family
- Anthracite Grey
- Colour Family
- Grey
- Colour Family
- Green
- Colour Family
- Blue
- Colour Family
- Red
- Colour Family
- Brown
- Colour Family
- Pink
- Colour Family
- Orange
- Colour Family
- Purple
- Categorised As
- Metal Paints > Low Temperature Topcoats
- Seasonal
- Cold Weather
- Product Type
- Synthetic Urethane
- Environment
- Atmospheric
- Environment
- Low Temperature
- Touch Dry/Dust Free (@ 20-25°C)
- 60 mins
- Product Attributes
- Gloss Retention
- Product Attributes
- Colour Retention
- Product Attributes
- Isocyanate Free
- Product Attributes
- Non-Yellowing
- Product Attributes
- Non-Chalking
Questions
Question about the product
Bruce Klam
on
2022-10-19 21:21:28
| Question:
Can SigmaDur 550 be applied over gelcoat? |
Answer from Rawlins’ Technical Team:
Assuming the gelcoat is clean, dry, sound and prepared as detailed in the technical data sheet it can be applied. | |
|
James Sullivan
on
2022-05-02 06:36:41
| Question:
Good Day, can we use 550A with 540B as hardner as we have a lot of each at the moment |
Answer from Rawlins’ Technical Team:
Unfortunately no, the part A and part B from these products are not interchangeable . | |
|
ABDUL HAFEEZ
on
2022-02-28 12:01:43
| Question:
Is it suitable to apply Sigmadur 550 over galvanised surface . ? for warning sign purpose |
Answer from Rawlins’ Technical Team:
No we would not recommend applying this product directly to a galvanised surface. Assuming it is clean, dry, sound and prepared as detailed in the technical data sheet, PPG Sigmacover 280 could be used as a primer first. | |
IMPORTANT SHIPPING & DELIVERY INFORMATION
PPG SigmaDur 550 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
*All estimates are based on theoretical consumption rates for a single coat and do not take into account any substrate deviations or wastage
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