Follansbee TCS II is an architectural stainless steel coated with Follansbee’s patented ZT alloy. The ZT alloy coating on TCS II is reactive to oxygen in the atmosphere, forming an attractive gray surface patina. TCS II provides enhanced corrosion resistance, formability, solderability and durability. Follansbee metal roofing offers reduced lifecycle costs, minimal maintenance requirements, modern aesthetic appeal and energy saving benefits.