We recommend 3M Body weld to hold the clips on. Its by far the strongest that we've found. Its a little difficult to work with as its a two part epoxy style adhesive and it needs to have a certain clamping force applied to make it the proper thickness, but it dries to what can only be equated to as hard as a weld. We can get the part number for the material as well as the gun if anyone is interested in it.