A pencil tile trim would cover the gap.
How to fill gap between granite backsplash and wall.
Caulk normally used would not work because it s too large a gap.
Align the ends of the molding with the ends of the countertop quickly as epoxy has a.
Choose a color that matches the countertop and spread a thin continuous bead with no voids.
Tool the caulk by drawing your finger along it to form a concave surface.
Turn the molding over and press it into the corner gap between the granite countertop and the tile backsplash.
Apply the caulk with a caulking gun.
Darciegage2 has the best solution.
Lay painter s tape along the edge of the countertop and the wall just above the gap to keep caulk off these surfaces.