Delrin (Acetal Homopolymer), Delrin Sheet, Delrin Rods. DELRINÂ® is a crystalline plastic which offers an excellent balance of properties that bridge the gap between metals and plastics.DELRINÂ® possesses high tensile strength, creep resistance and toughness.It also exhibits low moisture absorption. It is chemically resistant to hydrocarbons, solvents and neutral chemicals.elrin (Acetal Homopolymer), Delrin Sheet, Delrin Rods. DELRINÂ® is a crystalline plastic which offers an excellent balance of properties that bridge the gap between metals and plastics.
Steel and aluminum are the most popular metal roof materials. Metal roofing prices vary depending on the material. Costs usually range somewhere between $350 to $1,100 per square. A square equals 100 square feet and is the standard sizing for most roofing materials.
Copper roofing is the most expensive option available. However, it also is considered the most durable metal roofing option. A 25-foot by 40-foot roof built with 20-ounce copper material will cost approximately $31,000 to install. However, the green patina that forms over the copper makes the roof both attractive and durable.