Kuject WT001 Solder Seal Wire Connectors, 120-Piece

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Product guide

Kuject WT001 Solder Seal Wire Connectors, 120-Piece

Piece: Kuject WT001 solder seal wire connectors are a colour-coded butt-splice set for joining wires with heat. The listing describes a self-soldering, heat-shrink design intended for automotive and marine wiring, but customers report that getting enough heat to melt the solder can also damage the sleeve.

At a glance

Self-soldering butt splices are described as requiring a heat gun rather than crimping or separate soldering.
Four colour-coded connector sizes are specified for different wire cross-sections.
Listing claims hot-melt adhesive rings and heat-shrink tubing help seal the connection against moisture.
Connectors are described as bendable after joining, which may help in narrow spaces.

Price

£8.49Save 23%

Reference price: ~~£10.99~~

Price checked: 12 Nov 2026

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Pros and cons

Pros

The four listed wire-size ranges provide options from 0.25-0.34 mm² up to 4.0-6.0 mm².
The self-solder and heat-shrink approach combines joining and insulation in one connector.
Customer feedback reports ease compared with soldering and connections that hold up over time.

Cons

A heat gun is required, and customer feedback says substantial heat may be needed to melt the solder.
Customers report that the sleeve can melt or burn during heating, making temperature control a practical concern.

Technical specifications

22 specifications

Identity
Brand	Kuject
Model	WT001

Connector details
Connector type	Butt Splice
Terminal	Butt Terminal
Colour	RED BLUE YELLOW WHITE
Maximum voltage	12 Volts (DC)
Working temperature	Work Temp: -67℉ - 257 ℉
Contact material	Phosphor Bronze
Insulation material	Polyethylene
Material listed	Tin, Polymer
Specification listed	IATF16949:2016

Dimensions and installation
Weight listed	0.24 Pounds
Dimensions	20L x 10W x 1.7H centimetres

Connector sizing and heating
White connector size	Diameter 1.7 mm, able cross-section 0.25-0.34 mm² (A.W.G.:26-24)
Red connector size	Diameter 2.7 mm, Cable cross-section 0.5-1.0 mm² (A.W.G.:22-18)
Blue connector size	Diameter 4.5 mm, Cable cross-section 1.5-2.5 mm²(A.W.G.:16-14)
Yellow connector size	Diameter 6.0 mm, Cable cross-section 4.0-6.0 mm²(A.W.G.:12-10)
Shrinkage ratio	3:1
Temperature that start to shrink	80℃
Temperature that solder ring start to melt	111˚C
Temperature that solder ring melt completely	138˚C
Suggested hot air gun setting	400-600℃ (752-1112°F)

What to know before buying

Listing details to confirm

The title says 120 pieces, while the package list totals 120 connectors: 30 white, 40 red, 40 blue and 10 yellow. The listing also describes the outer material as both polyethylene and polyolefin, and gives manufacturer claims about water resistance and certification that are not independently confirmed here. Follow the specified wire-size ranges and use controlled heating, as customer feedback reports sleeve damage during heating.

Who is it for?

A good fit for

DIY automotive or marine wiring repairs where the wire cross-section matches one of the four listed connector sizes.
Buyers seeking a heat-activated splice that does not require crimping.

Less suited to

People without access to a suitable heat gun.
Wiring that exceeds the listed 12 Volts (DC) maximum or falls outside the specified cable cross-sections.

Kuject WT001 Solder Seal Wire Connectors, 120-Piece · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.5 / 5 · 45,687 ratings

5 stars74%74%
4 stars16%16%
3 stars6%6%
2 stars1%1%
1 star3%3%

Customer feedback describes the connectors as easy to use compared with soldering and says connections can hold up over time. It also raises a practical heating concern: enough heat to melt the solder may melt or burn the plastic sleeve. Experiences with convenience and value are mixed. That matters for a heat-activated connector whose listing recommends a 400-600℃ hot air gun setting, so careful heating is important. Aggregate ratings lean positive, but do not establish how reliably any individual joint performs.

Positive themes

Customers report that the connectors work well and can be easier to use than soldering.
Feedback describes strong connections that hold up over time.

Negative themes

Customer feedback reports that the sleeve can melt or burn while applying the heat needed to melt the solder.

Mixed feedback

Customers disagree about convenience and whether the connectors are worth the money.

Frequently asked questions

What is included in the listed 120-piece set?

The package list specifies 30 white, 40 red, 40 blue and 10 yellow connectors.

What wire sizes do the connectors fit?

The listed cable cross-sections are 0.25-0.34 mm² for white, 0.5-1.0 mm² for red, 1.5-2.5 mm² for blue and 4.0-6.0 mm² for yellow.

Does installation require a heat gun?

Yes. The listing describes heating the connectors to shrink the tubing and melt the solder ring, and suggests a hot air gun setting of 400-600℃ (752-1112°F).

What do customers report about installation?

Customer feedback says the connectors can be easier than soldering and form strong connections, but also reports that substantial heat may be needed and the sleeve can melt or burn.