Super Heater Heat Packs provide instant
portable and reusable heat and is very easy to use.
This is THE replacement for electric heat pads and hot
water bottles. At the push of a button, this amazing
device reaches temperatures of up to 130ºF. The
Super Heater will generate heat for two to three hours,
depending on the size and insulation. The Super Heater
heat pack is available in a variety of sizes for many
different uses. From soothing a backache to warming
a scuba wet suit, to warming your hands while camping,
the Super Heater can be used in countless ways to provide
quick, easy, non-electric, non-toxic, safe to use heat.
This product marks a major advance
in heat therapy and treatment because it does away with
bulky, outdated products. Instant, portable and reusable
heat makes this heat pack a technological breakthrough.
Use the smaller sizes to heat
smaller areas like your hands and the larger sizes to
heat your entire shoulder or back. Each durable vinyl
Super Heater pack is ultrasonically sealed to prevent
leaks. The food-grade salt solution inside is completely
safe. The trigger button inside the pouch is made of stainless
steel and is surrounded by a plastic rim which makes it
easy to activate.
To reactivate after use, just boil the vinyl pouch in
water until it is clear and then remove and let cool.
It is then ready for another use. 
What is happening here is strange
but can be understood if you think about water freezing.
Water freezes at 32 degrees F or 0 degrees C. If you
were to stick a thermometer in a cup of water and put
the cup in the freezer, you would find that the temperature
of the water falls to 32 degrees F and then hangs there
until all of the water is completely frozen. Then the
temperature of the solid water falls to the temperature
of the freezer.
What if you could somehow supercool the water? That
is, say that you could get the water's temperature to
10 degrees below freezing without it crystallizing into
a solid (you can sometime do this using a very clean
glass and distilled water so there are no points for
the water to begin crystallizing). In this condition
you can tap the glass and the temperature of the water
will jump up to 32 degrees F/0 degrees C and the water
will solidify quickly.
Our magic heat packs contain
sodium acetate and water. It turns out that sodium acetate
is very good at supercooling. It "freezes"
at 130 degrees F or 54 degrees C, but it is happy to
exist as a liquid at a much lower temperature and is
extremely stable. Clicking the disk, however, has the
ability to force a few molecules to flip to the solid
state, and the rest of the liquid then rushes to solidify
as well. The temperature of the solidifying liquid jumps
up to 130 degrees F or 54 degrees C in the process.
When you boil the solid you melt it back to the liquid
state. You have to completely melt every crystal or
the liquid will quickly re-solidify. You can repeat
this cycle thousands of times, just as you can freeze
and melt water as many times as you like.
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