Solder melts at low enough temp safely.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
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BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Regular price
$24.99 USD
Regular price
$34.99 USD
Sale price
$24.99 USD
28%
Unit price
per
28%
Shipping calculated at checkout.
Why Thousands Trust the BOLTHUT™ Solder Seal Connectors
One splice, done right — bonded and sealed before you move on.
Bonds + Seals
Solder joins the copper while the tube shrinks tight.
Vibration-Ready
A bonded joint helps resist the loosening crimps can develop.
Seals Out Moisture
Adhesive-lined walls close around the insulation.
Color-Coded Sizes
Match your wire gauge to the color band.
No Soldering Iron
No crimp tool or soldering iron — just heat.
Factory-Clean Look
A finished splice, not a taped-up lump.
Fast US & Canada Shipping
30 Day Money Back Guarantee
24-Month Warranty
Free US Shipping Over $59
Fast US & Canada Shipping
30 Day Money Back Guarantee
24-Month Warranty
Free US Shipping Over $59
Fast US & Canada Shipping
30 Day Money Back Guarantee
24-Month Warranty
Free US Shipping Over $59
Fast US & Canada Shipping
30 Day Money Back Guarantee
24-Month Warranty
Free US Shipping Over $59
Fast US & Canada Shipping
30 Day Money Back Guarantee
24-Month Warranty
Free US Shipping Over $59
Fast US & Canada Shipping
30 Day Money Back Guarantee
24-Month Warranty
Free US Shipping Over $59
Couldn't load pickup availability
Guaranteed Safe & Secure Checkout
Product Information
Strip, insert, heat — and the splice is done. These solder seal wire connectors combine the bond and the seal in one pass of heat, so you're not choosing between a solid joint and a weather seal the way a bare crimp or tape makes you.
Inside each clear tube is a low-temp solder ring and a dual-wall shrink body with adhesive that seals the ends. Apply even heat and the solder flows around the copper strands while the tube shrinks down and its adhesive closes the ends. Four color-coded sizes span 26–10 AWG, so there's a fit for thin signal wire, 12V accessories, and heavier runs alike. Best for low-voltage DC wiring repairs — support the wires so the joint isn't under tension.
What's in the Kit
- White connectors — 26–24 AWG for thin signal and LED wire
- Red connectors — 22–18 AWG for most 12V accessory wiring
- Blue connectors — 16–14 AWG for heavier accessory runs
- Yellow connectors — 12–10 AWG for heavier-gauge wire
- Snap-lid organizer case with the color/gauge chart on the lid
Match your wire to the chart on the lid. Piece count depends on the kit size you choose: 50, 100, 250, or 500 connectors.
Specifications
| Connector type | Solder seal heat-shrink butt connector |
| Tubing material | Dual-walled polyolefin with adhesive-sealed ends |
| Min. shrink temp | 80°C / 176°F |
| Solder melt temp | 138°C / 280°F |
| Wire range | 26–10 AWG, 4 color-coded sizes |
| Heat source | Heat gun recommended — not included |
| Best for | Low-voltage (12V DC) automotive, marine, trailer, and RV wiring repairs |
| Not for | AC mains, high-load main power, or jobs a code/standard requires a rated connector for — consult a professional for those and for fused or grounded circuits |
Shipping & Delivery
Destinations: United States (48 contiguous states) & Puerto Rico, Canada, and 16 more countries worldwide. We don't ship to Alaska & Hawaii at this time.
United States: Processing 1–2 business days · delivery 7–10 business days · Standard $6.98 · Secured $10.98 · FREE over $59.
Canada & international: rates shown at checkout · delivery 7–10 business days (US/CA).
Every order includes full tracking.
30-Day Returns
You have 30 days from delivery to request a return. Email us first at support@bolthut.com — our team confirms your return and sends the authorized return address.
Refunds: issued to your original payment method within 10 business days after inspection.
Please wait for authorization from our team before shipping any return.
24-Month Warranty
Every BOLTHUT™ purchase includes a 24-month warranty covering manufacturing defects — replacement-first: verified issues get a new unit shipped, usually without sending the old one back.
Please inspect your order upon delivery. For shipping damage or a wrong item, contact us within 48 hours with clear photos. Manufacturing defects stay covered for the full 24 months.
Need Help?
Questions about your order? We reply within 24 hours.
Email: support@bolthut.com
Make a splice that actually holds. These solder seal wire connectors bond and seal your wires in one pass of heat — strip the ends, slide one into each side, and heat. Each one is a dual-wall heat-shrink butt connector with a low-temp solder ring (flows at 138°C/280°F) inside clear polyolefin tubing, in four sizes for wire from 26 to 10 AWG. As the solder flows around the copper strands, the tube shrinks down and its adhesive seals the ends, helping keep moisture out of trailer lights, marine runs, and 12V accessory wiring. Four sizes come in a labeled snap-lid case. Built for low-voltage DC wiring repairs on cars, boats, trailers, and RVs — just add a heat gun (not included).
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
$24.99
$34.99
-28%
Free US Shipping $59+
30-Day Returns
24-Month Warranty
Secure Checkout
Trusted by 16,000+ Drivers
No Soldering Iron
Does This Sound Familiar?
If your splices keep failing in the same spots, you're not imagining it.
😤 "My crimp splices keep working loose on bumpy roads."
🌧️ "Taped joints corroded and cut out after one rainy season."
🔧 "No room to run a soldering iron under the dash."
🚐 "Trailer lights flicker every time I hit a pothole."
🔁 "I'm tired of redoing the same splice twice."
❄️ "Salt and snow killed my plow wiring last winter."
You don't need a steadier hand — you need a splice that bonds and seals in one shot.
Why the Usual Fixes Don't Last
Electrical tape
Unwinds in engine-bay heat and lets moisture creep into the joint.
Standard crimp connectors
An incorrectly sized or poorly made crimp can loosen — and adds no seal of its own.
Twist-on wire nuts
Built for dry indoor runs — not for a shaking, wet vehicle.
Hand-soldering
Takes more setup and still leaves a bare joint you have to seal separately.
A bare crimp or tape asks you to pick between a strong bond OR a weather seal. This kit gives you both in one heating step.
Bulk Brings the Price Down
The More You Splice, the Less Each One Costs
Step up a kit size and your cost per connector drops.
Also in a 100-piece kit. Stock up once and keep the right connector on hand for every job.
Aftermarket accessory. Not affiliated with, endorsed by, or sponsored by any vehicle manufacturer; brand names used for compatibility reference only. Always check fitment for your exact year/make/model before purchase.
See It in Action
Watch the solder flow and the tube seal — before you order.
NOW PLAYING
Why the BOLTHUT™ Connectors Actually Hold
The bond and the seal happen in the same few seconds of heat.
Bonds the Copper
Low-temp solder flows around the strands for a metal-to-metal join.
Seals the Splice
Adhesive-lined walls shrink down and close around the insulation.
Holds on Bumps
A bonded joint resists the backing-out that loosens a crimp over time.
No Guesswork
Four color bands span 26–10 AWG wire at a glance.
Tight-Spot Friendly
No crimp tool or soldering iron — just a heat source.
See Your Joint
The clear tube lets you check the solder flow as it sets.
One step for the bond, one step for the seal — the same step.
Where People Reach for These Every Week
One case covers the wiring jobs that keep coming up.
🚗 Automotive harness repairs
🚤 Boat & trailer wiring
🚐 RV & van builds
🔊 Car audio installs
Built for the Splice That Has to Hold
Precision Where It Counts — Inside the Tube
Every connector does two jobs in one pass of heat: bond the copper, then seal the joint.
That's the difference between a repair you trust and one you revisit.
- Low-temp solder ring · Adhesive dual-wall tube · Color-coded sizing · Clear body
The Centered Solder Ring
A band of low-temp solder sits in the middle of the tube.
Flows at 138°C / 280°F
With even heat it flows around the copper strands before the tube over-heats.
The result is a metal-to-metal join, not just a mechanical grip.
- ↳ Melts at 138°C/280°F · Flows into the copper · Metal-to-metal bond
Dual-Wall Tubing That Seals
The outer wall shrinks while an inner adhesive layer melts.
Shrinks from 80°C / 176°F
That adhesive closes around the wire insulation on both ends.
Moisture, salt, and grime are kept out of the splice.
- ↳ Adhesive-lined · Shrinks at 80°C/176°F · Closes both ends
Color-Coded, No Guesswork
Four colors map to four wire-gauge ranges.
Covers 26–10 AWG
Match your wire to the band and you've got the right size.
White for thin signal wire up to yellow for heavier-gauge lines.
- ↳ White 26–24 · Red 22–18 · Blue 16–14 · Yellow 12–10 AWG
A Joint You Can Check
The tube is clear, so nothing about the splice is hidden.
See the solder set
You watch the solder flow and the walls close as you heat.
You can confirm the solder flowed instead of crimping blind.
- ↳ Clear body · Visible solder flow · Easy to inspect
Designed Down to the Detail
Small choices inside each connector are what make the splice last.
🔧
Low-Temp Solder
A low 138°C/280°F flow point, made to bond with controlled, even heat.
🛡️
Dual-Wall Lining
An adhesive inner wall seals the joint as the outer wall shrinks.
✅
Gauge Color Bands
Four colors keep you from guessing the right connector size.
🔒
Clear Shrink Body
Lets you watch the solder flow and confirm a clean join.
One Kit for Common Low-Voltage Repairs
Harness & Accessory Repairs
Splice in lights, sensors, stereos, and 12V add-ons that stay put over bumps.
Where Moisture Is Constant
Help seal boat, trailer, and dock wiring against spray and damp.
House & Solar Wiring
Join 12V runs on campers, vans, and off-grid setups with a sealed joint.
Clean Speaker Runs
Make tidy, low-profile splices behind panels and under seats.
Four Steps, One Pass of Heat
How to Make the Splice
1
Strip & Tidy
Strip about 1/3" on each wire end and lightly twist each end's own strands so they don't fray.
2
Pick the Color
Match your wire gauge to the color band and grab that connector.
3
Insert Both Ends
Slide one wire into each side so the bare ends overlap under the center solder ring.
4
Heat to Seal
Heat and rotate until the solder flows and the tube shrinks tight. Before any wiring, disconnect the battery, use the exact fuse rating the kit calls for, ground to bare metal, and see a pro if you're unsure.
From Loose Splice to Sealed Joint
★★★★★
The solder melts quickly with a mini heat gun and seals tight every time.
Olivia B. · ✓ Verified Buyer
One Kit for the Whole Rig
The jobs that used to mean tape, crimps, and do-overs now take one connector.
🔧Repairs built to last instead of a quick patch.
🚗One case covers car, boat, trailer, and 12V wiring.
🔒Splices designed to resist vibration and keep moisture out.
Solder Seal vs. Generic Fixes
BOLTHUT™
Solder-bonded copper-to-copper join
Adhesive seals the splice as it shrinks
Bond and seal in one step of heat
Color-coded across 26–10 AWG wire
Clear tube — you can inspect the joint
30-day returns + 24-month warranty
Generic Fixes
A loose crimp with no seal of its own
Bare joint that still needs taping
Separate crimp, then tape, then hope
One-size barrels, loose on thin wire
Opaque — no way to check the bond
Hit-or-miss no-name support
What's in the Case
Four sizes, sorted and labeled, ready for the next job.
1
White — 26–24 AWG
For thin signal and LED wiring.
2
Red — 22–18 AWG
For most 12V accessory runs.
3
Blue — 16–14 AWG
For heavier accessory wiring.
4
Yellow — 12–10 AWG
For heavier-gauge wire.
5
Organizer Case
Snap-lid box with the size chart on the lid.
Our Story
Why BoltHut Exists
We started BoltHut with one belief: a car is just a box — until you make it yours. Every product we ship is something we'd bolt onto our own rides first.
🚗
Drivers First
Picked by people who actually drive.
🔧
Made for Real Life
Practical, portable, easy to use.
🛡️
Backed by Care
24-month warranty and real human support.
— The BoltHut Team
What to Expect
From order to a sealed splice, here's how it goes.
📦
Step 1
Order Your Kit
- Pick your size: 50, 100, 250, or 500 pieces.
- Checkout is secure and backed by a 30-day money-back guarantee.
🚚
Step 2
It Ships Out
- We process orders in 1–2 business days.
- US & Canada delivery runs 7–10 business days.
🔧
Step 3
Make the Splice
- Strip, insert, and heat — a clean joint in seconds.
- Match the color to your wire and you're set.
Who Reaches for These
If you run wire anywhere it shakes or gets wet, this is for you.
DIY mechanics
Boat & trailer owners
RV & van builders
Car audio installers
Off-roaders
Home 12V & solar tinkerers
★★★★★ ★ 4.9/5 storewide average · Trusted by 16,000+ drivers
What Drivers Are Saying
★★★★★
These solder seal wire connectors are a real upgrade for automotive electrical work. I used them on a few harness repairs and the weather-tight seal is solid. The heat shrink tubing contracts nicely while the solder inside flows evenly to bond the wires.
Marcus Vance
✓ Verified Buyer
★★★★★
I bought this kit for rewiring my boat and trailer. The solder flux melts smoothly with a heat gun, creating a strong and sealed connection without needing separate crimping tools. The color-coded sizes make finding the right piece effortless.
Brian Cox
✓ Verified Buyer
★★★★★
A go-to set for any wiring project. Standard crimping can loosen over time, but these create a strong, water-resistant bond in seconds. I used them for outdoor lighting and boat wiring where moisture is a constant issue.
Daniel Sterling
✓ Verified Buyer
★★★★★
Excellent wiring connectors. Easy to heat, melts evenly, and holds tightly. Highly recommend for any DIY electrician!
Samantha Reed
✓ Verified Buyer
★★★★★
Great heat shrink solder connectors! Makes wiring projects so much faster, and the joints seal up tight.
Alex Mercer
✓ Verified Buyer
★★★★★
Very reliable wire connectors. The solder melts quickly with a mini heat gun and seals tight every time.
Olivia Brooks
✓ Verified BuyerQuestions
Common Questions, Answered
Everything you need to know before you splice. Contact us — we reply within 24 hours.
Will these work with my wire?
Yes — four color-coded sizes cover 26–10 AWG. Match your wire gauge to the color band and you've got the right fit.
Is it hard to use?
Not at all. Strip, insert, and heat — it's designed for a clean, sealed splice on the first try.
How fast do these ship?
We process orders in 1–2 business days. US and Canada delivery runs 7–10 business days.
What if they don't work for me?
You're covered by a 30-day money-back return if it's not the right fit for you.
Is there a warranty?
Yes — a 24-month warranty with replacement-first support if anything's wrong.
Do I need any tools?
Just a heat gun for even, controlled heat — no crimper or soldering iron required. The heat gun isn't included in the kit.
✓ 🔧 No soldering iron
✓ 🛡️ Sealed against moisture
✓ 🔄 30-day returns
Make the Splice That Holds
Bond and seal your wiring in one pass of heat.
Pick your kit size and keep the right connector on hand for every job. (Heat gun not included.)
Get Your Connector KitHeat-Seal in Seconds24-Month Warranty30-Day Returns
Customer Reviews
Overall rating: 4.8 / 5 from 1988 reviews.
No crimp tool needed, excellent convenience.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Fits nicely in my portable tool bag.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Keeps trailer light wires dry.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Waterproof glue holds wire jacket tight.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Clean solder finish without extra tools needed.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
High quality kit for all electrical work.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Easy to store in portable organizer.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Clear plastic allows instant visual check.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Solid connection that won't pull apart under stress.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Excellent wiring connectors. Easy to heat, melts evenly, and holds tightly. Highly recommend for any DIY electrician!
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Affordable solution for reliable wire connections.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Solder flows fast and seals tight.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Fast, durable, and waterproof wire splices.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Fast delivery, great value pack!
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Solid bond once cooled down completely.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Worked perfectly on truck light repair.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Great value for money!
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Worked well on my camper trailer light connections.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Worked perfectly on my boat bilge pump.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Good range of sizes for different wire gauges.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Worked like a charm on boat wiring!
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Solid bond that handles vibration easily.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Worked like magic on lawn mower wiring!
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
No crimp needed, excellent results!
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Clear plastic lets you verify solder joint easily.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Solder flows cleanly into wire strands.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Solder connection is strong and reliable.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Fast delivery, great value pack!
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Very satisfied with purchase. Great price!
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
High quality kit for all electrical work.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Solder melts quickly without scorching jacket.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Made my trailer wiring project quick and worry-free.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Clean finish with no exposed wires.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Great assortment kit for small repairs.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Very good quality connectors with clear size markings.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Decent connectors. Make sure to use a heat gun rather than a lighter so you don't burn the outer tubing.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Great quality product for electrical work.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
The transparent tubing lets you inspect solder connection quality immediately.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant
Clear box keeps connectors sorted neatly.
BOLTHUT™ Solder Seal Wire Connectors — Heat-Shrink, Water-Resistant