The best glue is one that is designed to hold heavy fabrics like denim together and allow you to do your normal routine without worrying about the hold.
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Aleene's Original Glues - How to Glue Fabric to Fabric - No Sew
Fabric Glue : 6 Steps - Instructables
Aleene's Original Glues - How to Glue Fabric to Fabric - No Sew
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