300Pcs Solder Seal Sleeve Waterproof Heat Shrink Butt Wire Connectors Terminals


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  • Connect wires, solder, insulate, and seal in one easy step
  • It is ideal for marine and automotive applications
  • Polyolefin tube on the outside, hot melt adhesive on the inside
  • Welding and sealing with advanced waterproofing
  • Polyolefin heat shrink butt connectors increase pullout strength and provide sealing, strain relief, cable inspection, and insulation


  1. Insulation Sleeves: PE 

  2. Terminal Body: Tin Ring
  3. Item Weight: approx.100g/pc
  4. Dimension: 17x10x2.2cm
  5. Shrinkage ratio 3:1
  6. Contains hot melt adhesive with waterproof function
  7. Hot melt adhesive color marking applicable sizes
  8. Solder ring design is easy to construct
  9. Connector operating temperature: -55°C-125°C (-122°F- 290°F)
  10. Minimum shrinkage temperature: 80°C (180°F)
  11. Minimum welding temperature: 138°C (300°F)
  12. Included Components:

White solder ring 25PCS 26-24AWG (0.25-0.34mm2)

Red solder ring 35PCS 22-18AWG (0.5-1.0mm2)

Blue solder ring 30PCS 16-14AWG (1.5-2.5mm2)

Yellow solder ring 10PCS 12-10AWG (4.0-6.0mm2)

Black casing 200PCS 20mm length

Instructions for use:

  1. Strip wire insulation 1/3 inch (about 0.3 cm) on both ends. Insert the solder sleeve and string the wires together.
  2. When using a heat gun, continuously rotate the connector and apply heat evenly around the solder until it flows into the wire.
  3. Then apply heat to both tube ends until the adhesive flows and seals the line.
  4. Remove the heat and let it cool before use.

Please Note:

  • It is recommended to use a heat gun with a temperature of 1500-2000 watts and keep a distance of 3-5 cm from the welded joint when applying heat. Wire connectors can easily break if the heat is too close.