What is the ultra-tough material and is it durable?
UnderBlock⢠UV & Moisture Barrier is a specially blended high density polyethylene (HDPE). HDPE is widely known for its durability and is commonly used as a geomembrane for landfill liners and pond liners. It has also been used for decades as a covering for telephone wires and electrical cables. When exposed, properly blended HDPE has shown exceptional resistance to weathering, freezing and stress cracking. Experts claim that when exposed, it should last for over 100 years. When covered (as in a landfill or with slate) it should last for hundreds of years.