If your Oster® blender is leaking, check the following:
  • Is the sealing ring over the blade?
  • Is the threaded bottom cap on tight enough?
  • Is the jar cracked at the bottom?
  • Is the threaded bottom cap cracked?
  • Is the sealing ring missing?
  • Is the sealing ring cracked, broken or rotting?
  • Does the item being blended exceed jar capacity?
For replacement parts for an Oster® blender, please contact a local service center.