Phase Change Material (PCM)

Traditional gel packs are not able to reach/maintain sub-zero performance.

TCP’s Phase Change Material (PCM) is capable of storing and releasing large amounts of energy, allowing it to maintain a temperature within a specific range.

PCMs can reliably achieve and maintain 0°C (32°F) Refrigerated, -7°C (19.4°F) Frozen, -16°C (3.2°F) Frozen, and -21°C (-5.8°F) Ultra-cold, depending on the applications or need.

PCM Cases

Phase Change Material Brochure

A full product summary is available via a downloadable PDF document.


A Phase Change Material (PCM) changes from a solid to a liquid and back to solid at a precise temperature.


New hard shell practically indestructible and can be reused for multiple years without further investment.


No Hazardous Material charges during shipping, as with Dry Ice. All PCMs are Non-Toxic and Non-Hazardous!

Made in the USA

TCP is a proud employer of veterans. Our PCM are made in the United States of America.

Phase Change

A “Phase Change” is a transition between a liquid and a solid, like ice, or a transition between a solid and a gas, dry ice for example. When a PCM freezes, it releases a large amount of energy called “latent heat” and does this at a relatively constant temperature. As the PCM melts, it absorbs a large amount of heat from the environment.

Temperature Options

Our PCMs are engineered to solidify at different temperatures, allowing them to maintain a constant exact temperature in a refrigerated or frozen range that we desire. Our PCM’s come in four temperature variations.

PC -7

-7°C or 19.4°F

PC -16

-16°C or 3.2°F

PC -21

-21°C or -5.8°F

PC0 and PC-7 must be frozen completely solid at 3° F. or -16 ° C. or colder to get maximum efficiency. This usually can be accomplished within 24 to 48 hours depending on the temperature of the storage environment. Standard home refrigerator/freezer units will freeze this product.

PC-16 must be frozen in a -20 degree Celsius or -4 Fahrenheit freezer. Many residential freezers are not cold enough to freeze PC-16. PC-21 must be frozen in an ultra-cold freezer of -50 Celsius or colder, not a residential freezer.
Learn more from via our full Product Brochure (PDF)

Call for specialty sizes

Size Options


9-3/8″ long by 7-1/8″ wide by 1-3/8″ depth


9-1/2″ long 5-1/2″ wide by 2″ depth


12-1/2″ long 8-2/5″ wide by 1-3/5″ depth


Our PCMs provides specific temperatures for a variety of applications.

  • Reusable

  • Non-toxic and environmentally friendly

  • Multi-Year Shelf Life

  • Durable

  • Made in the US

About TCP PCMs

Our PCMs provides specific temperatures for a variety of applications. The “phase” temperatures are the temperatures at which each product undergoes the phase change, or melting, from solid to liquid. These temperatures are 0°C (32°F), -7°C (19.4°F), -16°C (3.2°F), and -21°C (-5.8°F). The latent heat of each product allows all heat absorbed to be used in the melting process, or phase change, without any temperature change, providing a stable passive cooling system.

Each proprietary formula was specially designed to form a highly regular geometric structure when frozen, which is the basis of the large potential for heat energy storage. The specific ingredients of each formula pinpoint the temperature at which the phase change will occur. The non-hazardous solutions were also developed to cycle through the freeze/thaw phase change thousands of times without degradation of materials. Many substances can effectively act as a PCM, however, it requires extensive knowledge and research to develop a combination that allows them to maintain a constant exact temperature in the refrigerated or frozen range that is desired.


Created by TCP, our Sub-zero Packs are capable of maintaining any freezer or insulated cooler at sub-zero temperatures -7°C (19.4°F) (-16°C/3°F) for an extended period of time by means of a simple chemical process. The packs are reusable, non-toxic, environmentally friendly AND can be stored either frozen or thawed for many years.

PCM Cases

The non-hazardous salt-based PC-7 pack will be ready for use if stored in a standard temperature freezer. Simply place the pack into a freezer for a minimum of 24 hours prior to first use (-19°C/2°F for best results), or store the Packs in your freezer year-round. Whenever an unexpected, long-term power loss occurs, the PC-7 Sub-zero Packs will absorb incoming heat to maintain the frozen foods for an extended period of time.

Other uses call specifically for the colder environment maintained using PC-16 or PC-21. If you need refrigerated environment, use PC-0. The temperature and duration will depend on your selection and the packaging or system to be maintained. All physical and chemical data concerning each product is available on request.

Consult our cold chain experts to determine which formula is best suited, and how to design the most effective package, for your unique application.

Additional Information

Initial purchase cost higher than dry ice investment, but reusable on a continual basis for at least five years. This is a leveraged investment not a one- time cost that is duplicated with each shipment. Customized applications available upon request.

Reusable, new hard shell practically indestructible and can be reused for multiple years without further investment.
Maintains low temperatures longer than ice & dry ice three to five times longer, depending on insulation, amount of PCM and environmental temperatures, and which PCM is being used. Longer life and higher performance result in minimizing risks associated with transportation, customs, and storage delays. No Hazardous Material charges during shipping which you have with Dry Ice. All of TCP’s PCMs are Non-Toxic and Non-Hazardous!
Eliminates the risks and complications associated with handling, “gas off,” import/export restrictions, and environmental issues associated with the use of dry ice.
Eliminates the inconvenience, cost, and environmental complication associated with clean up and disposal of melted dry ice chemicals following each shipment.

Contact Us Today

Our sales and service teams are ready to help with any of your medical or cold chain logistical needs.

Product Gallery

TCP’s Phase Change Material (PCM) is capable of storing and releasing large amounts of energy.

urgent medical case transport

A History in the Medical Field

TCP is dedicated to the medical and first responders communities. Read more about how TCP developed a portable blood bank, using Phase Change Materials (PCMs), to maintain the precise temperatures required to store and transport blood.