A method of forming a cured elastomer article, comprising: (a) partially crosslinking an elastomer compound at a first crosslinking temperature to form a thermoplastic precursor compound having a first crosslink density, wherein the elastomer compound comprises an elastomer, a first free radical initiator, and a second free radical initiator; and (b) further heating the thermoplastic precursor compound to a second crosslinking temperature and further crosslinking the elastomer to a final crosslink density to form the cured elastomer article, wherein either the elastomer compound is first introduced into a mold where both step (a) and step (b) then take place or the thermoplastic precursor compound has a first crosslink density that is from about 1% to about 40% of the final crosslink density of the cured elastomer article; and wherein either: (i) the first free radical initiator has a half-life of from about 0.2 minutes to about 5 minutes at the first crosslinking temperature, the second free radical initiator has a half-life of from about 0.2 minutes to about 5 minutes at the second crosslinking temperature, and the second crosslinking temperature is higher than the first crosslinking temperature by at least about 30 °C; or (ii) the first free radical initiator has a first one-minute half-life temperature, the second free radical initiator has a second one-minute half-life temperature that is higher than the first one-minute half-life temperature by at least about 30 °C, the first crosslinking temperature is from about 20 °C lower than the first one-minute half-life temperature to about 20 °C higher than the first one-minute half-life temperature, and the second crosslinking temperature from about 20 °C lower than the second one- minute half-life temperature to about 20 °C higher than the second one-minute half-life temperature; further wherein the elastomer compound comprises a third free radical initiator and step (a) further comprises heating the elastomer compound to a third crosslinking temperature and partially crosslinking the elastomer at the third crosslinking temperature, wherein (iii) the third free radical initiator has a half-life of from about 0.2 minutes to about 5 minutes at the third crosslinking temperature and the first crosslinking temperature is higher than the third rosslinking temperature by at least about 30 °C; or (iv) the third free radical initiator has a third one-minute half-life temperature that is lower than the first one-minute half-life temperature by at least about 30 °C and the third crosslinking temperature is from about 20 °C lower than the third one-minute half-life temperature to about 20 °C higher than the third one-minute half-life temperature. (a) partially crosslinking an elastomer compound at a first crosslinking temperature to form a thermoplastic precursor compound having a first crosslink density, wherein the elastomer compound comprises an elastomer, a first free radical initiator, and a second free radical initiator; and (b) further heating the thermoplastic precursor compound to a second crosslinking temperature and further crosslinking the elastomer to a final crosslink density to form the cured elastomer article, wherein either (i) the first free radical initiator has a half-life of from about 0.2 minutes to about 5 minutes at the first crosslinking temperature, the second free radical initiator has a half-life of from about 0.2 minutes to about 5 minutes at the second crosslinking temperature, and the second crosslinking temperature is higher than the first crosslinking temperature by at least about 30 °C; or (ii) the first free radical initiator has a first one-minute half-life temperature, the second free radical initiator has a second one-minute half-life temperature that is higher than the first one-minute half-life temperature by at least about 30 °C, the first crosslinking temperature is from about 20 °C lower than the first one-minute half-life temperature to about 20 °C higher than the first one-minute half-life temperature, and the second crosslinking temperature from about 20 °C lower than the second one- minute half-life temperature to about 20 °C higher than the second one-minute half-life temperature; (iii) the third free radical initiator has a half-life of from about 0.2 minutes to about 5 minutes at the third crosslinking temperature and the first crosslinking temperature is higher than the third rosslinking temperature by at least about 30 °C; or (iv) the third free radical initiator has a third one-minute half-life temperature that is lower than the first one-minute half-life temperature by at least about 30 °C and the third crosslinking temperature is from about 20 °C lower than the third one-minute half-life temperature to about 20 °C higher than the third one-minute half-life temperature.