This is a 58 Gram Tub Of Rosin Soldering Flux Paste.

This solder paste has a mildy-activated agent to provide superior fluxing and reduce solder waste, it also helps you to produce high quality soldered joints. The active ingredients in DeoxIT® Rosin Soldering Flux are non-ionic and non-conductive, including when moisture is present.  The rosin based paste is ideal for situations when post-soldering cleaning is not possible, and when the residue must be highly insulating.