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3.3.3 Aggregate Retention Seal

An aggregate retention seal uses a lightly modified PMB to provide an improvement in adhesion performance, compared to a conventional bitumen. It reduces the risk of aggregate loss by early sweeping or trafficking, particularly in warm/hot conditions, or where binder application rates are considered to be low. It is to be used where the conditions do not demand the level of performance provided by use of HSS, XSS, or SAM treatments (the full terms are provided below).