I have the PEPE touchomatic and the Kerr Ultrawaxer. I’ve noticed
some differences with nichrome wire style pens versus soldering iron
Nichrome wire units:
Really good at cooling down fast, thus allowing wax extrusions such
as wax prongs or spanning structures between parts of wax carving.
Hottest place is at the very tip, which is nice for build-up style
since liquid wax is like solder and wants to flow to hottest point.
Have not been able to control heat as precisely as with Ultrawaxer.
Nichrome wire tip must be a loop, which means can’t get nice sharp
point or knife edge out of tip. Makes it harder to feather in melted
wax for low melting point wax wires (knife edge), and can’t produce
as small a wax bead (sharp point) as can be done with soldering iron
Soldering iron type units (Ultrawaxer):
Excellent heat control, can program just enough heat for various
Tips come with more variety; beavertail, knife edge, pointy things.
Tips can be modified easier without damaging ability to get hot.
Found it easier to get into really tight places without accidently
melting the wrong structures
Big heat sink, won’t change temperature as rapidly, thus extrusions
are more difficult (blow air across wax instead).
Hottest temp is not at very tip, thus when charging pen with wax, it
tends to spread out a bit. This can be overcome by manually pushing
the wax around with the wax block or another tool, but can be
I like and use both units, but bottom line is I reach for the
soldering style Ultrawaxer more often.