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The HydroShield Self Adhering Ice and Water Shield Underlayment is a roofing underlayment that is composed of an asphalt fiberglass reinforced membrane to deliver thermal stability for superior execution. It has a sand based surface which features an exceptional tear resistance and can be used during all season performances. This HydroShield Self Adhering Ice and Water Shield Underlayment adds protection when installed on steep rooftops in extreme weather conditions. This shingle underlayment is particularly important in areas where ice and snow collect on the roof. Areas such as eaves vents valleys and rakes. Flashing around chimneys and skylights. The HydroShield Self Adhering Ice and Water Shield Underlayment additionally feature direct to deck application with a split release film which is removed during installation designed for faster applications.