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Ultratorch® UT-40Si Soldering Iron/Heat Tool


A professional quality, butane-powered soldering iron/flameless heat tool

  • Ultratorch soldering tips feature Ultratip® Technology, the long lasting, oxygen-fee, copper based, iron and chrome plated tip with a built-in catalyst, pre-tinned with lead-free solder.
  • UT-40Si is a soldering iron and flameless heat tool
  • UT-40SiH is a dedicated flameless heat tool only
  • Butane powered for portability
  • Convenient slide switch ignition system for quick ignition
  • Adjustable temperature lever for temperatures up to 1200°F, equivalent to a 20-80 watt soldering iron
  • Compact, light weight and easy to use
  • Patented gas catalyst reaction system
  • UL & GS/TUV Listed for user safety
  • Use to pinpoint heat, remove surface mount components, repair vinyl, shrink heat shrinkable tubing, solder & desolder, spot dry, strip insulation with hot knife and more



UT-40Si Butane Powered Ultratorch
UT-40SiH Ultratorch with heat tip, .5” dia. shrink attachment and protective cap


Recommended Fuel: Master Ultratane® Butane Equivalent to Electric Iron: 20 to 80 Watt
Dimensions: 8.3" L (208 mm) Gas Tank Capacity: .5 fl. oz. (14 cc)
Approx. Operating Time: 1.3 hrs. Net Weigth: 2.6 oz (14 cc)
Approx. Solder Tip Temp. 840° F (450° C) Shipping Weight: 1 lb.
Approx. Heat Tip Temp.: 1200° F (650° C) Shipped Empty


The Ultratorch® UT-40Si is a great value option in Master's Ultratorch family. Comes with an Ultratip Soldering Tip, hot air tip, and protective cap. Great for soldering projects on the go!
product_downloads:Ultratorch UT-40Si Manual