Poly kraft is an engineered product with a multilayer structure that offers a combination of corrosion resistance, heat transfer properties, and mechanical strength. This product comprises an aluminum sheet layer, a polyethylene layer, and a craft paper layer, providing thermal insulation while preventing the formation of galvanic cells, thereby protecting the metal surface from corrosion and degradation. These features make poly-craft an ideal choice for insulation industries, petrochemical applications, marine environments, and industrial packaging. It can be manufactured in forms such as coils and Sinusoidal sheets.