Master Appliance

Master Appliance Ultratorch UT-100SiK Butane Powered Cordless Soldering Iron

Name: Master Appliance Ultratorch UT-100SiK Butane Powered Cordless Soldering Iron, Flameless Heat Tool for Wire Connectors and Pinpoint Butane Torch, 3 in
Brand: Master Appliance
SKU: B000FN6SOO

Bottom line: The Master Appliance Ultratorch UT-100SiK Butane Powered Cordless: Cordless butane iron, flameless and ready to use in about 30 seconds; main trade-off: butane fuel sold separately, adding to running cost.

Live pricing on eBay

As an Amazon Associate, SpecPicks earns from qualifying purchases. Full disclosure →

🛒 See live eBay price Also on Amazon — Check price → Compare to similar tools & maintenance

By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-06

Mike Perry — Hardware researcher since 2014. For PC and retro-hardware cleaning and maintenance tools, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference. About the author →

Pros & Cons

Pros

✓ Cordless butane iron, flameless and ready to use in about 30 seconds
✓ Equivalent to a 20-80W electric iron; solder temp up to 932F
✓ Hot air up to 1202F shrinks tubing and electrical wire connectors
✓ Ultra Tip oxygen-free copper tips, iron/chrome plated for longer life
✓ 3-in-1: solders, desolders, cuts, spot-dries, repairs vinyl

Cons

✗ Butane fuel sold separately, adding to running cost
✗ Only about 2-hour runtime on a full butane tank
✗ No corded/electric mode — fully butane dependent
✗ Tips and butane refills are ongoing consumables

SpecPicks Verdict

SpecPicks scored Master Appliance Ultratorch UT-100SiK Butane Powered Cordless… using a rating × review-volume × price-fit model applied to published specs and reviews across the tools & maintenance category. Master Appliance's tools & maintenance lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for tools & maintenance: PC towers accumulate significant dust in 3–6 months, so cleaning frequency drives cordless vs. canned-air tradeoff decisions. Match the device's RPM or CFM rating to your case size, and confirm battery runtime covers a full tower cleaning before ordering. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

USA FAMILY-OWNED COMPANY: Master Appliance has been manufacturing high quality industrial heat tools since 1958. Located in Racine, WI, with over 60 years of experience in the heat tool industry, you can find Master's heat guns and this UT-100Si cordless soldering iron trusted and put to use in some of the most well known manufacturing companies worldwide.
ULTRA TIP SOLDERING TECHNOLOGY: Oxygen-free, copper based soldering tips, with thick iron and chrome plating, drastically increase tip lifespan and conduct more heat to the end of the tip for more efficient soldering and shrinking of wire connectors
VERSATILE PINPOINT HEAT: Equivalent to a 20-80 watt electric soldering iron, this heat tool can remove surface mount components, shrink heat shrink tubing and electric wire connectors, solder and desolder, repair vinyl, spot dry, cut materials and more
CORDLESS, LIGHTWEIGHT & PORTABLE SOLDERING IRON: Flameless and ready to use in 30 seconds with an adjustable temperature lever and approximate 2 hour runtime on a full tank of butane fuel (fuel sold separately)
ADJUSTABLE TEMPERATURE OUTPUT: Soldering temperature up to 932F; hot air temperature up to 1202F (ideal for shrinking Master's electrical wire connectors)

Full Specifications

Brand	Master Appliance
Wattage	80
Head Style	soldering tips
Style Name	Pro Model
Unit Count	1.0 Count
Item Length	10.3 Inches
Model Number	UT-100SiK
Power Source	gas-powered
Item Type Name	Butane Soldering Iron
Handle Material	Metal
Heating Element	Ceramic
Number of Items	1
Special Feature	Butane Powered, Cordless
Additional Features	Butane Powered, Cordless
Included Components	Unit^Instruction Guide
Manufacturer Part Number	UT-100SiK
Specific Uses For Product	Industrial Use
ADJUSTABLE TEMPERATURE OUTPUT	Soldering temperature up to 932F; hot air temperature up to 1202F (ideal for shrinking Master's electrical wire connectors)
Manufacturer Warranty Description	Limited 1-year warranty
Global Trade Identification Number	00635705106049
Full listing title	Master Appliance Ultratorch UT-100SiK Butane Powered Cordless Soldering Iron, Flameless Heat Tool for Wire Connectors and Pinpoint Butane Torch, 3 in 1 Tool with Metal Case - USA Company

Ready to buy?

Master Appliance Ultratorch UT-100SiK Butane Powered Cordless Soldering Iron, Flameless Heat Tool for Wire Connectors and Pinpoint Butane Torch, 3 in 1 Tool with Metal Case - USA Company is vintage hardware; the used and vintage market on eBay carries most of the live inventory. Prices and condition vary by seller and move in real time, so we link the live listing rather than quote a cached price. It also has an Amazon listing — check it for current price and availability. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

See live eBay listings → Check Amazon listing →