Decarboxylate your hash by crumbling it on an oven tray and coat the top with aluminum foil, placing in the oven for 40 minutes on 240F.

In a strong mason jar, place your decarbed hash and oil and close the jar.

Put it in a pot of cold water and let the water come to a boil. Let it simmer for 30 minutes.

Take the mason jar out, and stir your oil to see that everything is dissolved.

Your hash oil is ready.