Mark the ground along the space where you would like to install the paver seat wall, using landscaping spray paint. Make the width of the wall two pavers wide and make the wall as long as you desire so that it fits your landscape.
Dig out the marked area for the wall to a depth of 8 inches, using a shovel. Fill the dug-out space with 6 inches of gravel.
Pack down the gravel by striking it evenly in an up-and-down motion with a tamper. This is the foundation for the paver seat wall.
Lay down the base layer for the paver seat wall. Place the pavers in pairs, side-by-side and end-to-end along the entire length of the gravel foundation.
Clip off the tip of the adhesive tube with the built-in cutter on the caulk gun. Puncture the seal inside the tip of the tube with the built-in puncture tool on the caulk gun. Insert the tube tip-first into the caulk gun.
Apply adhesive over the top surface of the base layer of pavers. Lay additional layers of pavers in the same manner as you did with the first layer until you reach a height of approximately 18 inches.
Lay additional layers of pavers up to an additional 8 inches high, leaving a 32- to 36-inch wide space in the wall at an approximately 18-inch height for the seat in the wall. Allow the adhesive to dry for 48 hours before using the seat.