Microcrystalline Wax

Microcrystalline wax is a petroleum-derived wax with a finer crystal structure than paraffin. In car waxes, it provides durability and flexibility that pure carnauba lacks — it bends with the paint rather than cracking in cold temperatures. Often blended with carnauba in "hybrid" wax formulations to get carnauba's depth with synthetic durability. The resulting blend (carnauba + microcrystalline) gives the best of both worlds. Not biodegradable but non-toxic.