5-Minute Epoxy will set up in 5 minutes or so, however it takes 24 hours to cure fully, so if you have any sensitive parts glued on or you're lookin' for strength like the body to the chassis, I would allow drying time. Also, if one doesn't mix the two parts evenly the glue may not work properly. And the two part epoxy has different colored caps on the tubes, black & white. Pick on color like white and put that on your mixing pad first, and ALWAYS do this and then use the tube with the black cap. Reason is if you put one part on your mixing pad, and the doorbell or the phone rings, or whatever interruption, you know which tube you used first and then you can finish mixing the second part.