PE-RT stands for ‘polyethylene of raised temperature resistance’. Polyethylene has excellent properties at high pressures and temperatures as well as being very flexible and easy to use. It is non-corrrosive, frost-resistant, creep-resistant and has a high impact strength. If the pipe is distorted, or even kinked, it can be reworked to its original shape very easily. The outer layer protects the oxygen barrier from mechanical damage, moisture and other damaging materials.