Is anyone familiar with flowable or pourable epoxy, which can withstand heat and flowing oil?

When I was at Daytona 24 Hours, I saw the Corvette team using a flowable epoxy to repair a metal casing which looked like a transmission case - they poured the epoxy onto a surface, and then used heat from a blow torch to cure the epoxy more quickly. It seeme to work, for they then went back out and the car did not retire.

Is is possible to use solder or bronze to effect a repair on brass tubes of an oil cooler instead? Some small tubes have separated from the bottom of the oil cooler, and one can't get a localized soldering joint into the small space between tubes; however, a flowable expoxy or flowing solder might do the trick. Please help if you know how....Andras