Closed-End Zippers are most often found on items like tents. These zippers are attached to one another and are incredibly simple to fix using the FixNZip Replacement Zipper Slider.
Step 1: The screw on the FixNZip Slider should be towards the outside of the item.
Step 2: Loosen the screw on the slider.
Step 3 : Slip the slider over one row of zipper teeth.
Step 4: Feed both rows of teeth into the slider. Position as close to the retaining box as possible.
Step 5: Tighten the thumbscrew all the way down.
Step 6: Squeeze the top and bottom of the slider at the same time. With your other hand, firmly grasp the zipper box.
Step 7: While still squeezing the slider, pull it up the zipper 1-2 inches. Then, retighten the thumbscrew if needed and continue up the zipper.