The good news is, a juvenile DUI in Nevada is automatically sealed when the defendant turns 21. However, if you were over 18 at the time of your arrest, there are only specific types of DUI charges that can be sealed. For example, first-time and second-time DUI convictions are eligible to be sealed seven years after the case has concluded. On the other hand, a DUI that results in catastrophic injury or death is deemed a felony in Nevada and cannot be sealed.