Required Maintenance Timeline for Each Extension Type Tape type: Inspection every 4 weeks, reapplication must be done after 6-8 weeks.Micro-ring: Moves up 6-8 weeks.Keratin fusion type: 3-4 months, but usually removed and reattached.Sewing style: tighten the stitches in 6-8 weeks.Clamp/halo type: No maintenance required, just removal.