Through patented technology. AirStone is light enough to glue directly onto drywall. This advancement simplifies installation. which saves time. money. and headaches. The beautiful. individual stones have the look and feel of natural rock. yet are ultra-light weight and very durable. And AirStone is so easy to install. Simply apply adhesive and press to the wall! Now. anyone can add the beauty. texture and warmth of stone anywhere inside or outside the home.This carton contains Primary Wall Stones (8 sq. ft). which are the basic wall covering unitSimple DIY installation; now anyone can add the warmth and texture of stone anywhere in a homeStones fit precisely together so that the supporting wall is unseenFor interior and exterior applicationMulti-Purpose Adhesive SOLD SEPARATELY- Amazon Part #: B099YPNNGGNon-flammable. safe around fireplacesSimple two-step installation: apply adhesive and press to the wallFor indoor projects use AirStone Interior Adhesive; for outdoor projects use Loctite PL Premium Polyurethane Construction Adhesive