Hi Alexei: I use 100% clear 50 year silicone in the 10.1 oz. (300 ml) tube. I use the Ace hardware store brand and apply it with a push-through-the-tube gun. Apply the silicone to both the stone and to the brass and smooth with finger and/or spatulas. Keep lots of rags around and paint thinner to remove the horrible sticky stuff from fingers, spatulas, brass and stone.
best John
