Specification

cryo-tek
A blend of virgin (not recycled) propylene glycol and high purity Triple Protection additives,
formulated for use in closed loop hydronic heating and cooling systems. Cryo-tek can also
be used in radiant tube heating systems, most solar heating systems and geothermal
loops. Hercules’ exclusive Triple Protection formula stabilizes pH to prevent acid
corrosion, chelates hard water minerals and inhibits the formation of scale and sediment.
These components work together to keep the system clean and operating efficiently by
eliminating system deposits, improving heat transfer and minimizing wear to moving parts
and seals. Cryo-tek is compatible with PEX and elastomeric radiant tubing, commonly
used materials for seals and bushings and provides corrosion protection for cast iron,
steel, copper, brass and solder. Cryo-tek has not been tested for use in systems
containing CPVC plastic. Standard cryo-tek products should not be used in systems
containing aluminum. Cryo-tek -100/AL is available for aluminum systems. Cryo-tek
should not be used in systems with galvanized piping as the zinc coating will be dissolved.
Cryo-tek is a 94-98% efficient heat transfer solution in most application dilutions. It has a
lower freeze point and higher boiling point than water and is non-flammable, odorless, non
-toxic, nonirritating and compatible with Hercules boiler stop leaks and heating system
cleaner products.
Spec Sheet #S00041
April 2011
ANTI-FREEZE for heating and cooling systems
Cryo-tek
™
TM
Cryo-tek is available in 3 formulations:
Cryo-tek Original
Contains virgin (not recycled) propylene glycol with Triple Protection corrosion inhibitor, pre
-mixed ready to use formulation. Can be added directly into system undiluted or diluted as
required. Certified Performance: Freeze Protection Down to -22°F / -30°C, Pumpable Down
to -27°F / -33°C, and Burst Protection Down to -80°F / -62°C. Cryo-tek Original can be
further diluted with water for less severe conditions.(see Table II, page 3)
Cryo-tek -100
Contains virgin (not recycled) propylene glycol with Triple Protection corrosion inhibitor, pre
-mixed ready to use formulation. Certified Performance: Freeze Protection Down to -70°F /
-57°C, Pumpable Down to -80°F / -62°C, and Burst Protection Down to -100°F / -73°C.
Cryo-tek -100 can be diluted with water for less severe conditions. (see Table II, page 3)
Cryo-tek AG
A concentrated virgin (not recyled) propylene glycol with Triple Protection corrosion inhibi-
tor, which can be diluted with water to desired protection levels. (see Table II, page 3)
Test Kits and Accessories
Freeze protection levels and corrosion protection levels should be checked annually. Use
Hercules Refractometer (35290) and pH Meter (35272) or, cryo-tek Test Kit (35271).
Add additional cryo-tek product if freeze protection is inadequate. Add cryo-tek Inhibitor
(35276) if pH is below 8.5. (see Maintenance, page 4)
* Please check with equipment manufacturer of system to determine compatibility with this product.
**Minimum flow protection levels are estimated and are dependent on system and equipment.