Arcdura SD 420 Superdurable Polyester
Superdurable polyester powder for architectural sections that carry a long weathering expectation, supplied TGIC-free across the gloss range. It is the base superdurable grade, for inland and normal urban exposure.
Grade Arcdura SD 420 | Range Powder Coatings | Technology Thermosetting superdurable polyester powder, TGIC-free, solvent-free
Technical Data Sheet
Arcdura SD 420
Issue 2026.09
1. Product description
Superdurable polyester for architectural sections that carry a long weathering expectation: curtain walling, window and door profiles, louvres, rainscreen and balustrade. Gloss retention and colour hold well beyond what a standard polyester delivers on the same exposure, and it is supplied TGIC-free across the gloss range. This is the base superdurable grade, for inland and normal urban exposure.
2. Features
- Gloss and colour retention beyond a standard polyester on the same exposure
- TGIC-free across the gloss range
- For inland and normal urban exposure
- 60 to 80 microns dry film, with a stated minimum build for architectural work
3. Recommended uses
Curtain walling, window and door profiles, louvres, rainscreen and balustrade.
Substrates. Chromate-free pretreated aluminium extrusion and sheet, pretreated galvanised steel.
4. Typical properties
| Property | Typical value | Method |
|---|---|---|
| Technology | Thermosetting superdurable polyester powder, TGIC-free, solvent-free | Formulation |
| Appearance and finish | Fine, free-flowing powder; colour and gloss to order | Visual, against the agreed colour standard |
| Particle size distribution, d50 | 30 to 45 microns | ISO 8130-13, laser diffraction |
| Specific gravity | 1.2 to 1.8 g/cm3, set by pigment and filler loading | ISO 8130-2 or ISO 8130-3 |
| Gel time at 180 degrees C | 25 to 120 s | ISO 8130-6 |
| Inclined plate flow | 15 to 40 mm | ISO 8130-11 |
| Specular gloss | 5 to 95 gloss units at 60 degrees, to order; matt finishes read at 85 degrees and high gloss at 20 degrees | ISO 2813 |
| Adhesion | Cross-cut classification 0, no detachment, at 60 to 80 microns | ISO 2409 |
| Cupping and conical mandrel bend | 5 mm cupping and above without cracking; mandrel bend without cracking at the stated build | ISO 1520 and ISO 6860 |
| Accelerated weathering, gloss retention | Quoted at 2000 h exposure and above, as a superdurable polyester | ISO 16474-3 fluorescent UV, or ISO 16474-2 where a xenon cycle is specified |
Typical values, not a specification. Values for each batch are given on its Certificate of Analysis.
5. Application
| Parameter | Guidance |
|---|---|
| Application method | Electrostatic corona or tribostatic spray |
| Surface preparation | Chromate-free pretreated aluminium extrusion and sheet, or pretreated galvanised steel, clean and dry |
| Dilution or thinner | None; applied as supplied, solvent-free |
| Dry film thickness | 60 to 80 microns, not below the minimum build stated in the architectural specification; checked to ISO 2360 on aluminium and ISO 2178 on steel |
| Cure schedule | 10 to 15 min at 190 to 200 degrees C object temperature, confirmed with a data-logging oven profiler; oven air temperature is not the cure figure |
| Overspray | Metallic and bonded metallic shades in the SD subfamily are sprayed to waste, not reclaimed, so the shade does not drift |
| Exposure | For high ultraviolet, coastal or industrial atmospheres, specify SD 460 |
Process. Electrostatic corona or tribostatic spray, 60 to 80 microns dry film, with a stated minimum build for architectural work. Typical cure 10 to 15 minutes at 190 to 200 degrees C object temperature.
6. Storage and handling
Store sealed in the original packaging in a cool, dry place away from direct sunlight and heat sources, and let cartons reach workshop temperature before opening so that condensation does not form on the powder. Shelf life is stated on the label and Certificate of Analysis. Handle and use the product in line with its Safety Data Sheet.
7. Safety and regulatory information
Read the Safety Data Sheet before use. Safety Data Sheets and regulatory declarations are issued by our technical centre against the product and batch supplied, so they are sent on request rather than published. Request a Safety Data Sheet or declaration.
This Technical Data Sheet is published for on-screen reference. The information is given in good faith from laboratory and application experience and describes typical values; it is not a specification and does not replace a trial on your own substrate and line. Arctic Materials may revise this sheet without notice. Issue 2026.09.
Technical Data Sheets on this site are for on-screen viewing. For a controlled copy, write to tech@arcticmaterials.com.
Other grades in this range
Need a Safety Data Sheet, a regulatory declaration or a grade specified to your line? Contact our technical centre.