There were no instructions so I had to figure it all out myself. You should be aware that a window replacement tool will do the job on the spot. Use the bowl side of the tool. Once you've gotten four to six feet, you should get comfortable. The wheel groove sits on the edge of this material and maneuvers into place. Put your hand on the camper and don't push the wheel in too deep to avoid the screw heads. Run straight to the path to clean the screw heads. Stabilize again by resting your hand on the RV, the tool at about a 45 degree angle, maybe 1/8 inch into the groove. If you go low and run over the head of the screw you will lose your bead and start smaller from there. If you do it right, it goes very quickly. Be patient for the first ten feet and you will get there. Start right and left if you're right-handed. This should be done on a warm day. I waited until the end of May. 75F. It was too hard on a cool 50 degree day I had in April. Leave the old material and use it to measure the required length from the large roll. Allow yourself about 6 inches more as your original is likely shrunk and you can trim when you're done. Start with about an inch more as it can slip a little and is easy to trim. Don't be afraid to cut and leave 1/4 inch as it will shrink back down in a few months. If only someone would tell me all this! Much luck!