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New Zealand Steel describes current ZINCALUME® with Activate® technology as aluminium, zinc and magnesium alloy-coated steel. The magnesium-containing coating is designed to form a more robust barrier around cuts and scratches, slowing subsequent corrosion rather than making cut edges immune to corrosion.
More-info: https://johnsonroofingltd.co.nz/zincalume-roofing-auckland-warranty-exposure/ »
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