Strip the wire, slide on the connector, hit it with heat. The solder ring inside melts into the copper while the sleeve shrinks and seals both ends. One first-timer wrote it "worked extremely well with my first wiring project." Another hit his "for about 15 seconds with my heat gun": "boom, done!" 4.6 stars from 5,000+ reviews, kits from $24.99.
You have a dead trailer light, a video paused on a soldering iron, and a nagging feeling you will burn the insulation or your thumb. Skip that whole skill. The job is one splice that stays sealed in a wet, vibrating, hard-to-reach spot, and every common method fails that brief in its own way.
The solder is already inside the connector. When you apply heat, the ring melts into the wire strands while the sleeve shrinks and seals around the splice. That means the connector handles the delicate part for you: no separate solder feed, no extra shrink step, no trying to balance an iron in a cramped spot.
Built on The Dual-Wall Solder-Seal Process: fused in one heat cycle, sealed for the life of the wire.
$199.99 $99.99 Best Value ยท 500 Pcs ยท 50% off
Kits from $24.99
One kit replaces a soldering iron, flux, and a separate heat-shrink kit. No soldering iron needed for any splice.
Every connection that fails is a job you do twice: once now, again at the next car wash, trailer launch, or freeze. Spend the $25 once.
Choose Your Kit SizeEvery kit includes all four AWG sizes. The only question is how many you need.
Built on The Dual-Wall Solder-Seal Process: fused in one heat cycle, sealed for the life of the wire.
$0.50 per connector
$0.40 per connector
$0.24 per connector
$0.20 per connector
$199.99 $99.99 Best Value ยท 500 Pcs ยท 50% off
Kits from $24.99
One kit replaces a soldering iron, flux, and a separate heat-shrink kit. No soldering iron needed for any splice.
Every connection that fails is a job you do twice: once now, again at the next car wash, trailer launch, or freeze. Spend the $25 once.
Yes. The low-temp solder ring wicks into the individual wire strands through capillary action, creating a metallurgical bond. This is the same physics as traditional soldering. The difference is delivery: SolderStick puts the solder inside the connector instead of on the tip of an iron. CE certification confirm the connection meets industrial safety standards.
Any standard heat gun works. The solder melts at 138C (280F), which is well within the range of every consumer heat gun on the market. A butane torch also works if you keep it moving to avoid scorching the tubing.
A heat gun is one hand, pointed at the work from 2-3 inches away. A soldering iron requires one hand to hold the iron, one hand to feed solder, and somehow a third hand to hold the wires together. Heat guns work in any position: overhead, under a dashboard, in an engine bay. No flux. No dripping solder. No tip cleaning.
Most generic solder-seal connectors use single-wall tubing and inconsistent solder rings. Forum threads on Reddit and GarageJournal are full of reports about solder that barely melts and tubing that cracks in cold weather. SolderStick uses dual-walled polyolefin with an adhesive inner liner and is the only DTC brand with both CE certification. The $0.50 per connector price difference buys you connections that actually hold.
The kit includes all four AWG sizes, color-coded: White (26-24 AWG) for signal and speaker wire, Red (22-16 AWG) for standard automotive, Blue (16-14 AWG) for medium loads, Yellow (12-10 AWG) for high-current applications. If you are not sure, the 100-piece kit gives you enough of each size for most projects.
Every SolderStick kit ships with a 30-day money-back guarantee. If the connectors don't perform as described, return them for a full refund. no questions asked. Free worldwide shipping is included on every order.
Use them on your next project. If any connector fails to seal, solder, or hold up to your standards, contact SolderStick support for a full refund. No return shipping. No restocking fee. 24/7 support.
24/7 customer support
Solder-quality connections. Waterproof seal. One tool. Ten seconds.
Built on The Dual-Wall Solder-Seal Process: fused in one heat cycle, sealed for the life of the wire.
$199.99 $99.99 Best Value ยท 500 Pcs ยท 50% off
Kits from $24.99
One kit replaces a soldering iron, flux, and a separate heat-shrink kit. No soldering iron needed for any splice.
Every connection that fails is a job you do twice: once now, again at the next car wash, trailer launch, or freeze. Spend the $25 once.
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5,000+ People Stopped Soldering the Hard Way
Bought these for boat trailer connections. Exposed to constant dunking in salt water. They worked great!
Steven F.Boat Trailer WiringI've used them on the job for several years now, to make splices that have to last, and there's nothing else I've found that does it better, or easier.
MichaelSplices That Have to LastA far better connection than crimp style connectors and they come with the heat shrink tube already on them.
Matt B.Replaced Crimp Connectors