What is Mylar?
Mylar is a polyester film (similar to a plastic sheet) made from stretched polyethylene terephthalate. Polyethylene terephthalate (PET) is the most common thermoplastic polymer resin of the polyester family. “Thermo,” as in heat, which is why home inspectors, we nor typically find these types of plastics and films in the laundry room being used as…