Resinite

Resinite was a grade 4 premium scavenged compound crafting material.

Source
Resinite could be gathered from a Diatium Cargo node, which required 235 skill in scavenging. It was most commonly found on Balmorra,  Taris, Hoth, and Quesh.

The following materials could also be found in Diatium Cargo nodes:

It could also be obtained from grade 4 scavenging missions. Additionally, there was a chance to obtain Resinitefrom reverse engineering the appropriate level and type of gear.