Place beef, jerky seasoning, and 2 tablespoons plus 2 teaspoons cure in a large bowl. Massage beef with your hands until evenly combined. Cover and refrigerate, 8 hours to overnight.

Preheat the air fryer to 160 degrees F (70 degrees C). Place beef slices on the rack, making sure none are overlapping.

Air fry for 3 hours. Open the air fryer and let beef sit for 1 hour for final drying and cooling. Store in an airtight container.