ALCO Shield™ GRANULAR+ Ice and Water Protector is designed for use as a shingle underlayment in critical areas of the roof, such as eaves, valleys, ridges, dormers and skylights. ALCO Shield GRANULAR+protects roof structures and the interior from water penetration caused by ice dams and wind driven rains.
ALCO Shield GRANULAR+ is a polymer modified asphalt membrane, glass fiber reinforced with a granular surface providing skid and tracking resistance during installation, as well as sealing around the shingle fasteners for the life of the shingles.
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