DuPont Thermax XARMOR (ci) Exterior Insulation is the toughest, most durable polyiso insulation for the Thermax patented wall system.  Designed for continuous insulation, Thermax XARMOR (ci)’s glass-fiber-reinforced polyisocyanurate foam core is homogenous – featuring finer cell size and better cell orientation, reducing voids and knit lines – resulting in one of the highest R-values(2) available for immediate insulation and weather protection on the job site, as well as long-term thermal performance.