This compound utilizes the system of cross – linking of polyethylene known as Sioplas. It is a two component system comprising a Silane Grafted LLDPE, known as the graft copolymer XL 333, and master batch XL 900 containing a cross – linking catalyst. The two materials are normally used in the ratio of 95 parts graft to 5 parts catalyst master batch.

Stored separately, these materials are fairly stable but when mixed and exposed to moisture, cross-linking takes place.

This system allows the compound to be extruded as a normal thermoplastic, which will then attain a high level of cross-linking in the processed from. The finished product has all the properties associated with polyethylene cross-linked by other methods.