Carbon Fibre Assembly Paste for Seat-post or Stem 35g Tin Fast Freddy. Eliminates the need to over-tighten clamps to achieve a tight, secure and safe fit Over tightening can cause internal fractures and fatigue of carbon fibre parts resulting in permanent failure Additionally inadequately tightened components can be hazardous if they move or slip suddenly whilst riding Apply fiber grip in a thin film to all clamping areas of stems, handlebars, seat posts, and seat tubes Tested and approved by leading carbon fibre component manufacturers 60 days a return if not happy with my produces :::)