I need to replace the door seal weatherstripping (again) on my 1958 Austin Healey 100–6. The material I purchased from Moss seems to have an aluminum internal clamp that doesn't grip very well. A friend told me to give the TR six version a try. I purchased this material. However, it does not seem to be any better. I would rather not glue this material in place. Is there another material that has a stronger grip? Or, is there a clamping tool that would help it stay put?