A heat gun is a handheld tool that blows concentrated hot air, typically between 100–550 °C, for stripping paint, removing adhesives, shrinking tubing, and thawing frozen pipes.
For the full breakdown, see our best Cordless Heat Gun guide.
A heat gun is often mistaken for a heavy-duty hair dryer, but the comparison stops at the shape. It produces far higher temperatures, and that heat is the working part. Whether you’re restoring furniture, repairing electronics, or unthawing a lock, a heat gun applies focused warmth exactly where you need it. The trick is matching the temperature to the material so you soften what needs softening—without scorching everything else.
What Does a Heat Gun Do?
A heat gun delivers a steady stream of superheated air through a nozzle. Most models let you adjust the temperature, usually between 100–550 °C, with some pro-grade units reaching about 760 °C. That range matters: what melts plastic film will scorch wood or soften solder joints.
Here are the jobs it handles best:
- Stripping paint and varnish — soften old coatings so they lift with a scraper instead of fighting you.
- Removing stickers and adhesives — heat breaks the bond so decals, labels, and tape peel away clean.
- Shrinking tubing and film — heat-shrink wire connectors and plastic wrap tighten around their contents.
- Thawing frozen pipes and locks — a steady warm stream clears ice without the risk of an open flame.
- Bending and shaping plastic — PVC conduit and acrylic sheets become pliable for custom fitting.
- Electronics rework — reflowing solder or desoldering components on circuit boards.
- Drying surfaces — accelerating paint, glue, or damp wood before the next step.
- Vinyl and upholstery repair — shrinking vinyl wrinkles or activating adhesive for trim and leather work.
Heat Gun Temperature Settings by Task
There isn’t a single “correct” setting—the right temperature depends entirely on what you’re heating. The table below shows typical working ranges by job.
| Task | Typical Range | Why It Works |
|---|---|---|
| Drying paint or varnish | 30–130 °C | Gentle warmth speeds curing without blistering the finish. |
| Drying damp wood | 100–200 °C | Low heat drives out moisture without cracking the grain. |
| Bending plastic pipes | 200–300 °C | Softens PVC so it flexes without kinking or snapping. |
| Heat-shrinking plastic film | 200–300 °C | Tightens wrap and tubing around the item for a snug seal. |
| Welding plastics | 330–400 °C | Melts mating surfaces so they fuse into a solid joint. |
Start at the low end of the range and work up. You can always add more heat, but you can’t undo scorched wood or a melted fitting.
What a Heat Gun Is Not For
A heat gun is not a hair dryer, and treating it like one is the most common mistake. Holding one too close or lingering in one spot can burn paint, warp plastic, or start a fire.
Safety matters most with older finishes.
The other limit is material compatibility. Heat guns work on metal, wood, plastic, adhesives, and electronics, but each substrate tolerates heat differently. Too much warmth loosens solder joints on circuit boards and deforms plastic trim. Match the temperature to the material, keep the nozzle moving, and test on a hidden spot first.
Should You Buy One?
References & Sources
- Master Appliance. “How to Use a Heat Gun.” Task-by-task temperature guidance and operating tips.
- Wagner Group. “The All-Rounder Tool: Heat Guns.” Overview of common heat gun applications and techniques.
- RS Components. “Heat Guns: An Introduction.” Technical guide covering temperature ranges and material considerations.