If you like to make crafts that use fabric or ribbon, you are familiar with unfinished edges. When sewing, unfinished edges are typically hemmed under, which protects the edges from further fraying and keeps them out of view.
Fray Block…What is that? – The Sewing Garden
Fray Block Brush Bottle - 730976038300
SEWING PRODUCT: Fray Stop / Fray Check
How to Use Fray Block
June Tailor - Demonstration Videos
Fray-Block - Prevent Lace Edge from Fraying and Rubbing
How to Use Fray Check
How to Keep Quilt Blocks From Fraying
Making Pretty Buttonholes - Threads