Stabilize your grill at 450°F. Bank all of your coals to one side of the grill and top with a cast iron grill grate.
Trim any visible silver skin from the surface of the tenderloin.
Combine all ingredients in a bowl and fully incorporated. Season the tenderloin with the Lanes BBQ Honey Sriracha Seasoning and paint mixture evenly on each tenderloin and allow to marinate for at least 10 minutes.
Season the Cast Iron with a touch of oil and place the quick marinated tenderloins on the grill grate. Sear for 6 to 7 minutes and flip. Close the dome and cook for another 10 minutes. Open the dome and turn 1 more time on the side that needs a bit searer, close the dome and cook for another 4 to 5 minutes. Look for an internal temp of 140°F.
Once you have reached the correct internal temperature, remove the tenderloins to a cutting board and allow to rest for 8 to 10 minutes. Slice down the loin and enjoy.