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A clear plastic box containing 200 black heat-shrink butt connectors with visible solder rings

200PCS Solder Seal Heat Shrink Butt Connectors Waterproof Wire Connectors Kit

SKU CH-QF74-6KNAX

Solderless heat-shrink butt connectors with dual adhesive rings create waterproof splices using only a heat gun

  • Certifications and standardsUL Listed
  • Product colorBlack
  • Faster joints with a heat gun only
  • Bendable after heating for tight-space repairs
  • Dual adhesive rings block moisture ingress
  • Tubing resists melting before solder flows
  • IATF 16949:2016 listed for automotive use

200-Piece Solder Seal Connector Kit

This kit supplies 200 waterproof butt connectors designed for automotive, marine, boat and truck wiring repairs. Each connector uses a solder ring and heat-shrink tubing with dual adhesive rings to create a sealed joint. The UL Listed components meet IATF16949:2016 automotive quality standards for reliable repairs.

Heat-Gun Installation Limits

Connections require a heat gun to melt the internal solder ring and shrink the tubing; open flames or lighters risk uneven heating and insulation damage. The solderless, crimpless design suits confined spaces where traditional tools cannot reach, but the installer must control temperature carefully to prevent the tubing from melting before the solder flows.

Simple Process With Common Pitfalls

Strip the wires, insert them into the connector, and apply heat until the solder ring melts and the adhesive rings seal the joint. The most frequent errors are insufficient heat leaving a cold solder joint, excessive heat burning the tubing, and failing to let the connection cool fully before stress testing the repair.

How it compares

Measured against everything we stock in Wire Connectors & Cable Ties, at today’s prices. Recalculated every night.

Price $20.99
Pricier than about 66% of the 1,040 comparable items (median $13.99).

Specifications

Product
Product colorBlack
Environment & compliance
Certifications and standardsUL Listed

Questions about this item

Which wire gauge range does this 200-piece kit cover?

The kit contains 200 solder-seal butt connectors with dual hot-melt adhesive rings; each connector accepts the wire sizes printed on its sleeve, so you can match the connector to the gauge you are repairing.

How does the solder ring behave when heated with a heat gun?

The connector uses a solder ring that melts and flows around the stripped wires while the outer tubing shrinks, creating a sealed joint without a separate soldering iron or crimp tool.

What does the UL listing on these connectors actually certify?

UL listing confirms the connectors have been tested to the applicable UL wire-connector safety standard, covering electrical insulation, mechanical strength and flammability for the intended splicing application.

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