UniCote® Coastal

For That Extra Protection

UniCote® Coastal takes our standard zinc/aluminium alloy-coated steel substrate to the next level with the addition of magnesium. This enables the zinc to ‘flow’, which seals the cut edges, preventing exposure to premature corrosion. With a substantial 210gms/m2 coating this makes it ideal for harsher environments and those nearer the coast.

UniCote® Coastal is a highly durable product with improved cut edge performance designed to give excellent colour retention and high formability at moderate cost.

  • Category
    Steel Roofing, Metal Cladding, Sectional Garage Doors
  • Range
  • Warranty
    30 years

UniCote® Coastal performance testing


Good scratch resistance. Testing includes needle scratch test – no marking of paint surface when a needle with a 2kg weight attached is drawn across. ASTM D5178-13.


AS/NZS2728:2013 Table 2.2 and Appendix E. No loss of paint adhesion after a test piece is struck on the reverse side with a specified force, in line with the test methodology described in Appendix E.


AS/NZS2728:2013 section 2.6.1 and Appendix F – No loss of adhesion or paint cracking when bent around a diameter equal to five times the thickness of the sheet.


Suitable for continuous service up to 100ºC. Continuous service at higher temperatures may cause some colour change and damage to the paint film.


Meets the requirements of AS/NZS2728:2013 Sections 2.8 and 2.10.


Meets the requirements of AS/NZS2728:2013 Sections 2.8 and 2.9.


Meets the requirements of AS/NZS2728:2013 Section 2.8 and Table 2.4. Note: Tests are conducted on a flat panel.


A steel roof is most susceptible to the elements along cut edges – but not UniCote® Coastal. The addition of magnesium to the standard zinc/aluminium alloy makes all the difference. As time goes on it allows the protective metal coating to microscopically flow over the cut edge. At this point a sacrificial anti-corrosive reaction takes place and a robust seal is created.

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Technical Info

For those who like the finer details

TECHNICAL – Conforms to AS/NZS2728:2013. Suitable for ISO9223:2012. Atmospheric Classifications C1 – C4.

SUBSTRATE  – Hot-dipped zinc/aluminium/magnesium alloy coated steel coil, 210gms/m2 coating weight.

PRE-TREATMENT – Corrosion resistant chromate conversion coating.

PRIMER – Flexible corrosion resistant chromated primer. Nominal film thickness 7μ ± 1μ on the top side and 5μ ± 1μ on the reverse.

FINISH COAT – Flexible exterior acrylic, polyester or modified polyester coating. Nominal film thickness 18μ ± 2μ.

BACKING COAT – Shadow Grey (standard colour) wash coat, 5μ ± 1μ nominal thickness.

GLOSS – Typical gloss levels are 25 ± 5% measured in accordance with AS/NZS 1580.602.2 (60 degrees). A range of our colours can also be supplied in a low gloss version if required.

STRIPPABLE FILM –Products can be supplied with an optional strippable protective film at extra cost. This material has a relatively short life span when exposed to sunlight and weather. It should be removed either just before, or immediately after installation.

SKU: MagnaFlow Hamptons White
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About the

UniCote® steel is designed and made for Australia, but to also inspire and challenge the Australian pre-painted steel landscape. Starting with a highly durable product, the Unicote range offers everything from classic colours to modern patterned and textured steel finishes. Combining the world’s best coil coating technology with rigorous Australian standards testing, it provides superior performance and stunning aesthetics that go beyond most building materials.

UniCote® is a brand of pre painted steel offered by Selection Steel which is an Australian owned company with almost 50 years’ experience in the Australian steel and building industries. Over the course of four decades, we’ve become known for our quality world-class products which help create beautiful designs and architecture.

Selection Steel offers bespoke and unique pre-painted steel products and solutions that are not only innovative, but provide the ability to push the boundaries of Architectural design and stand out from the crowd with long lasting, stunning patterns and finishes. With a wide range of versatile products offering versatility and uniqueness of the products offers endless options for those with creative flare on projects from for small residential developments all the way up to large scale commercial builds

Our offers:

  • UniCote® LUX: Pre-painted patterned steel in a wide range of options including timber-look steels, rusted iron and corten looking steel, natural Zinc patterns and exotic patterns. 
  • MagnaFlow™: Pre-painted steel suitable for coastal and corrosive environments with added protection leading the way in the industry backed by strong warranties 
  • UniCote®: Pre-painted steel in a wide range of Australian and bespoke colours backed by strong warranties
At ArchiPro we recognise and acknowledge the existing, original and ancient connection Aboriginal and Torres Strait Islander peoples have to the lands and waterways across the Australian continent. We pay our respects to the elders past and present. We commit to working together to build a prosperous and inclusive Australia.