I have a gas grill outdoors under an overhang. Rain leaks down the sides of the grill to the brick storage compartment below and makes a mess. The enclosure for the grill is stone on top and brick on the surrounding walls. What caulking can I use to caulk arouond the edge and front of the grill to prevent it from leaking down into the brick storage area below. Is caulking safe for this, or maybe concrete caulk or silicone?