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The durability of a brick is a measure of its resistance to attack by soluble salts. All products manufactured by Austral Bricks are classiﬁed by their durability – either as an Exposure Grade (EXP) product or as a General Purpose (GP) product.
Bricks that are given an Exposure Grade rating are made to withstand high salt conditions.
An Exposure Grade brick should be used for external walls exposed to aggressive environments such as: