IKO has taken the science of roof preservation to a new level with Dynasty. This premium architectural-style shingle utilizes a heavyweight fiberglass mat coated with an APP-modified asphalt. Other features include the 3M™ Algae Block™ Copper Granule System, giving it a 10-year algae-resistance warranty. The shingle is independently certified to meet Class 4 UL 2218 Impact Resistance.