Looks United Brush-on Nail Glue Repairs Cracked or Broken Nails. Apply it like Nail Polish Simply Brushes over the Area to be Glued. HOW TO USE: Remove polish and clean nails thoroughly. Apply 1 drop of glue to the split or broken nails or nail tip. Spread evenly with brush. Hold the break or tip together with gentle pressure for 10-15 seconds. After each use, wipe applicator tip and replace cap tightly. HOW TO REMOVE: soak your nails in acetone polish remover for about 5 minutes. Do not forcefully try to pull or peel off artificial nails as this may damage your natural nails.