Backup rings are ideal for use with O-rings. Used in sealing applications, the backup ring should block the extrusion gap to protect the O-ring and the overall seal. Sold in multi-piece packs, backup rings are composed of PTFE, Buna-N, or Hytrel materials. Choose between standard rings and contoured rings. Use O-ring splicing kits to make replacement O-rings or for doing quick repairs on the job. O-ring accessories such as installation tools, splicing jigs, O-ring lubricants, and O-ring sizing gauges will make working with O-rings a breeze.