The Cure for Tummy Tucker Hot Foot
To secure the Koolmat to the tub you need some 3M Super Adhesive 8090 or other high temp spray on adhesive that works with fabrics. You also need some high temp RTV to seal the seams. The KoolMat is installed fabric side down, leaving the rubber side up toward your feet.
I cut a square for each side of the Jeep and then notched triangle sections out to make it fit the square corners. Once I had a good fit I sprayed the adhesive on the tub and the fabric and pressed it into place. I used black high temp RTV to seal the seams where different pieces of KoolMat come together.