Hi Mike, This is John from Duct Armor of Chicago. We provide the Duct Armor services for Illinois. The picture you posted is a rubberized duct liner that is used for in-slab duct work. It is applied using a camera and a spray applicator. The product is latex based and has zinc in it, to control mold growth. It also has a bonding agent that allows it to adhere to existing duct work and to itself for layering. The application is used to repair many different types of underground air ducts including rusted galvanized ducts and plenums, cardboard ducts and pvc air ducts. It also can encapsulate transite/asbestos pipe. The product has passed many rigorous safety tests and comes with a 15 year warranty. If you have any questions, would like a sample of the product, or would like more information about Duct Armor please call. I can be reached at 1-844-757-3828. Our website address is: ductarmor-crete-il.com .
