Use a work light and ladder. Then use any epoxy.
Clamp light to ladder rung 8-12 inches above work to be epoxied. [space between fins]
Turn on about 10-15 minutes before doing fillets.
Leave on for couple hours after, to speed cure
Here you see light heating fin being tacked on minimum diam. 98 tube. It was 48 F in garage, but simple light kept tube and fin very warm to touch. Used for fillets also.
Heck used for ANY epoxy work in cold.
Epoxy kept and mixed inside house then carried to project in garage.
If ya can't mix inside, at least store there to keep temp up or sit cans under light for 1/2 hr. before starting.
L-3 Tripoli 9693
[ICBM, Orangeburg,SC R.I.P.] - QCRS ,Princeton ILL - MDRA , Price Maryland - Woosh, Bong Wisconsin- ROCC, Charlotte NC , ICBM Camden SC
"Made" member of Chicago & Carolina Rocket Mafia
Rocketry...........an exact science.......but not exactly !!!