Heavy duty conveyor belts (1) having excellent resistance to high temperatures. These conveyor belts (1) can be repeatedly exposed to temperatures of greater than 200° C. or even 250° C. without compromising the strength or reliability of the belt while providing a greatly extended service life. The conveyor belts (1) may also be manufactured in a commercially viable and cost effective manner. The conveyor belts (1) generally include a reinforcement layer (3), a carry cover layer (2) disposed above the reinforcement layer (3), a pulley cover layer (4) disposed beneath the reinforcement layer (3), and the carry cover layer (2) is comprised of a fluoroelastomer. In some aspects, the conveyor belts (1) have a carry cover layer (2) which includes an outer surface layer (6) containing a fluoroelastomer and an inner layer (7) based upon an EPM elastomer or an EPDM elastomer.