Manufacturer page.

Uponor helioPEX™ X2 is a crosslinked polyethylene (PEX-other) pipe that features an oxygen barrier for use in radiant and hydronic heating and cooling systems. Technical specifications for the product and its use Uponor helioPEX X2 is used for closed-loop hydronic heating and cooling applications, including radiant heating and cooling, hydronic hot water heating, chilled water cooling, baseboard heating, and distribution piping for radiant, snow melt, turf conditioning, and permafrost prevention systems. The pipe features an oxygen-diffusion barrier that meets German DIN 4726 to prevent oxygen permeation. A polyethylene layer is extruded over the oxygen barrier to protect from site abuse and moisture saturation. Physical properties of the product, or link to website with this information Crosslinked polyethylene PEX manufactured using the PEX-a Midas method