VEVOR Seamless Seam Setter, 2 Packs Granite Seam Setter with 5 in Vacuum Suction Cups, Seam Joiner for Seam Joining & Leveling, 180° Adjustable, Countertop Installation Tool for Tile Stone Marble Slab

This product cannot be used on drywall because drywall has gaps that prevent vacuum adhesion If this answer does not resolve your issue, please contact us again for assistance.