DIY Coconut Oil Hair Mask Tutorial! Leave in treatment for 1 hour or overnight. 1 ingredient only, simplest tutorial out there. Controls heat and color damage, Maintains strong locks, Mends split ends, Tames frizz, Nourishes dryness, Promotes hair growth, Prevents hair loss, Fights dandruff, Obstructs dullness, Heals sulfate allergic reactions.