The aluminum core is absolutely diffusion tight and reliably prevents oxygen or gases from permeating into the pipe. It compensates and reduces snap-back forces and heat expansion with changes in temperature. Jindal MLC Pipes consist of an overlapped aluminum core with an inner and outer layer of polyethylene – PE. All the layers are permanently bonded together by intermediate adhesive layers. The aluminum thickness of Jindal MLC Pipes has been selected to meet compressive and flexural strength requirements.