Tyler said that he was going to a planet far away and would bury the Stargate, but Jack wanted to keep in touch. It is possible that Jack was able to keep the lines of communication open with Tyler and his fellow Reol because the Tok'ra were able to use a modified version of the chemical in a future mission involving Dr. Daniel Jackson posing as a lo'taur in the service of the Goa'uld System Lord Yu. It is also a possibility, however, that the SGC was able to give the Tok'ra the sample of the chemical taken from SG-1's uniforms by Dr. Janet Fraiser. (SG1: "The Fifth Man", "Summit", "Last Stand")