Im just guessing although I have never used it that Rocketpoxy is a fairly fast cure formula. The rule of thumb with epoxy is
the longer the cure the stronger the bond. I have used fast cure epoxies in small amounts for tacking fins followed by slow cure epoxies like Aeropoxy structural adhesive with great results.
Nope... ya guessed a wee bit off glenbo...lol.
If you need to compare it to something....JB Weld would be close in pot life and cure time.
I 've been through several gallons of it , since it's release and was part of the Beta test group. It goes through 3 phases:
1. first mixed, is very "loose" and has pot life of 30-60 minutes based on ambient temp of 65-75 & great for gluing stuff together. Does not even get warm in mix container.
2.If using for fillets, spread on section of cardboard about 1/4in thick and let sit for 15-45 minutes, based on temp again. If your mixing at 70...45 min at 85 -90 only 10-15 minutes. By spreading out like this, all air bubbles will rise to surface and escape, making for flawless fillets. To test for readiness, pull some epoxy "up" with stick, making small peaks. If they stay put it's ready. If the "peaks" fall down and spread out, not ready yet.
Place in V-grooves and pull fillet smooth. You can do all 6 fillets [on 3 fin] at once this way, & they hold their shape.
3. after epoxy stiffens up to "Clay" consistency it still can be used for bonding things or filling gaps.
Takes 24 hrs for full cure and ready for sanding. [give or take, based on temp again]
As you can see, the pot life is very long, ready to handle is several hrs, full cure 24.
Definitely not a fast cure epoxy.
I have used RocketPoxy for attaching fins to MM tube, then after only 2-3 hrs so it "sets", injected West 105 right over the RocketPoxy, for internal fillets.
Did small external fillets with RP, once again after just setting several hours, went right back over them with West filled with colloidal silica [406 light weight filler].
Done this on several 6in rockets that fly on big L's & M's. The fins are still on...lol [even after one landed on the highway and broke a 3/16th fin, but the fillets survived just fine, no cracks.]
Edit: why did I do this? [use 2 epoxies] I have done many projects, with "just RP' but was in the middle of one and knew I was going to run out. So I decided to test a "theory" and also see how well West would color black, using the supplied black dye that comes with RP.
I liked the combo and continue to use it for various reason. By the way West does accept the black dye beautifully.