You can fasten your metal house numbers onto brick using Gorilla Glue. The glue is waterproof and temperature resistant and can be used on interior and exterior projects. It is an ideal adhesive for attaching house numbers on bricks because it can bond dissimilar surfaces together. Accent your brick pillars or posts with wrought iron, brass, stainless steel or aluminum house numbers and adhere them without the need for messy drilling and installation of masonry anchors.
Position the house numbers on the brick pillar or post where you would like them located. Trace around the outline with a pencil to transfer the location onto the brick.
Lay the house numbers on a work surface with the back side facing up. Apply a bead of Gorilla Glue along the center of the line of each house number.
Apply a bead of Gorilla Glue along the center of each house number outline on the brick pillar or post. Center each house number over the respective outlines and press the back side of each number in place against the pillar or post.
Hold the scrap board over the numbers and slide a squeeze clamp over each end of the board. Fasten the opposite ends of the clamps over the back side of the pillar and squeeze the clamps tight.
Release the clamps after approximately two hours and set the scrap board aside. Carefully chisel off any excess glue that may have seeped out around the house numbers with a small flat chisel so that no glue is visible.