Technical Specifications

Spec Sheet #S00041
February 2007
cryo-tek
TM
cryo-tek
TM
*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.
ANTI-FREEZE for heating and cooling systems
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 and operating above 160°F/71°C. 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, non-
irritating and compatible with Hercules boiler stop leaks and heating system cleaner products.
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 inhibitor, 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)
DESCRIPTION