Originally Posted By Paul_Fancsali
JB it with clean prep and no coolant for at least 24 hours and don't do it outside with temps below 60


Paul is correct. I have repaired radiators both ways (solder & epoxy) and both work.
1. all epoxies will chemically resist antifreeze.
2. all epoxies will be OK with roughly 300F continuous temperature.
3. Slow cure epoxies are stronger, stick better & have better chemical resistance than 5-min. epoxies.
4. all epoxies stick very well to all metals that have proper SURFACE PREPARATION as another poster mentioned... including lead. For plastic, you need a 5-min.type epoxy designed for plastic (mercaptan based pt. B)

70 Roadrunner convt. street car 440+6, NOS, 4-spd, SS springs '96 Mustang GT convt. street car '04 4.6 SOHC, NOS, auto, lowered "Officer, that button is for short on-ramps"