Tomorrow or early next week we're installing studded aluminum letters and logo on a brick wall. Normally I'd use silicone in the drilled holes, and will for the letters, but the logo is 3' x 4' 3/4" thick aluminum and weighs 250 lbs. so I figured epoxy, which will set up fast while we hold it in place, and be stronger. Any suggestions for squeezing it into the holes without dribbling down the brick?