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Granite® organic coatings for roofing

ArcelorMittal’s Granite® range comprises a series of organic coated products, covering all possible applications for the outdoor building market.

The grades of the steel substrates available, combined with the properties of the Granite® coating, make these products attractive alternatives that meet all the requirements of the construction sector:

- aesthetic quality
- flexibility
- surface hardness
- coating adhesion
- corrosion & UV resistance

As part of ArcelorMittal's NATURE range, Granite® is 100% sustainable and does not contain hexavalent chromium or heavy metals.

  Health & Sustainability Certificate

Our selection guide helps you find the coating that best suits your needs!

  Organic coated steel - Selection Guide

The substrate for Granite® are galvanized steel, or other metallic coated steels with a layer of flexible paint on two sides consisting on an anticorrosive priming lacquer and a high or very high-durability resin.

There are three surface appearances:
- smooth (Granite® HD, Farm, HDS)
- matt (Granite® HDS) or
- grainy (Granite®HDS and HDX)

Backing Coats
Granite® is available with backing coat. It offers a full range of specific properties: foam adherence, mechanical properties, corrosion resistance. See the backing coat data sheet:

  Backing coats data sheet


ArcelorMittal’s Granite® range comprises a series of standard organic coated products for roofing and cladding.

Granite® Standard
Good corrosion resistance and good formability, smooth surface appearance  for basic coating for outdoor applications like cladding, roofing & accessories.

Granite® HD
Good UV resistance, good corrosion resistance and good formability, smooth and grained surface appearance, used for cladding, roofing, accessories and insulated panels.

Granite® HDS
Very good UV resistance, good corrosion resistance, good formability, and high durability polyester, smooth and grained surface appearance, used for cladding, roofing, accessories and insulated panels.

Granite® HDX

Very good UV resistance, excellent corrosion resistance, very good colour stability, very good formability and robust coating; grained surface appearance, for outdoor applications like cladding, roofing, etc in harsh environmental conditions.


This range of Granite® organic coated steels is designed for outdoor applications for the building market and comprises a number of speciality products. These products meet all the requirements of this market in terms of original surface finish and end-use properties.

Granite® Flex
Very good formability during deep drawing and profiling and very good surface hardness, smooth, grained, cloudy surface appearance, for applications that require high level of steel formability (tiles, HVAC equipment)

Granite® Deep Mat
Very good formability, good corrosion resistance, aesthetic quality: deep matt and wrinkled surface appearance, used for tiles and cladding applications.

Granite® Impression
Very good flexibility, suitable for deep drawing and profiling, good corrosion resistance and very good UV resistance. Aesthetic quality thanks to its 5 unique impressions.

Granite® Farm
Very good chemical resistance (inner surface), good UV resistance, smooth surface appearance, apt for roofing and cladding in rural areas (agricultural buildings)

Granite® PVDF
Excellent colour and surface appearance stability, good corrosion resistance and excellent chemical resistance, smooth surface, for cladding & roofing in architectural buildings & buildings in aggressive environment

Granite® Comfort
Thermosetting paint, high solar reflectance performance, very good resistance to solar radiation, good corrosion resistance, good formability, for external building application and general industry: sandwich panels, insulated systems, single profiles, building projects with low energy consumption requirement.

Granite® Storm
This new pre-painted steel for roofing applications offers extended durability, a matt finish and exceptional formability, all in one product. Granite® Storm is for roofs where aesthetics and durability are key and is an ideal alternative to the traditional tiled roof, offering the highest levels of robustness.

Granite® Quartz
A 45 micron paint system with a unique crystalline finish, excellent corrosion & UV resistance and a spectrum of classical & modern colours for outstanding & glittering façades and roofs.

Granite® HFX Cool
Optimised 55-micron paint system combined with a flexible steel grade (min. DX54D) that can withstand deformation and extreme weathering.


ArcelorMittal Flat Carbon Europe’s Granite® standard range of organic coated steels are available in a rich diversity of colours to suit your taste and your budget.

Photo: Clipsol, Aix-les-Bains (France) ©Tom  D´Haenens

  Colour chart Granite® and Estetic®


A natural wash of the organic coated surfaces by atmospheric rainfall shall normally be assured in order to prevent any clogging that may be detrimental to their appearance (dust deposits etc).

For walls and roof surfaces that are not naturally washed by rainfall, regular maintenance is compulsory, with the following minimum frequency:
- An annual washing without the use of abrasive or aggressive products;
- Systematic and immediate treatment of any parts that, for various reasons, show initial signs of corrosion.

Photo: Gymnase de Grenoble (France) - Photo Tom D'Haenens

  Maintenance Manual for Organic Coated Steels

Automatic Guarantee

ArcelorMittal is offering a guarantee for Granite® range of products: Granite® Standard, Granite® HD, Granite® HDS, Granite® PVDF and Granite® HDX. Now this guarantee has been completed with three new products for roofing: Granite® Flex, Granite® Cloudy and Granite® Deep Mat.

This guarantee is automatic as it is applied automatically at delivery of the product, to be used in normal conditions in exterior cladding (including garage doors) or exterior roofing (including tile panels but excluding gutters, junction elements and roof accessories) of buildings located in the European geographical area divided into 2 main zones (for more details refer to the general conditions of the guarantee).

Duration of the guarantee can vary depending on the product, coating, environmental conditions..., from 5 to even 35 years!

More details about the automatic guarantee:

  Automatic guarantee for Granite®
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