Remember to order tubes of our F26 Adhesive (10.3 oz. per tube) which has been specially formulated for use with Stone and Masonry Products.  It is a quick-setting adhesive, specifically designed for use with masonry and natural stone so that it won't bleed through the stone.  Kits that include 72" Hearths typically use 3 to 4 tubes.  Our smaller fireplace facing sets typically need 3 tubes.   Simply apply a small bead 1" or further from the outside edges of the stone and a large 'x''  1" from each corner. 

Also, you may be interested in our  CV230 Micore 300 Fiber Board, to place under your stone hearth.