U-tek® Gel Packs, Phase Change Material Gel Packs, Sonoco ThermoSafe

U-TEK® phase change materials (PCM) are formulated refrigerant gel packs for products that require frozen temperatures, but cannot tolerate dry ice or CO₂.

• For products that cannot tolerate dry ice
• Extended protection
• Radiant heat barrier

An alternative to water-based ice packs, these coolant packs offer superior protection for extended periods. Laminated, metallized film exterior provides radiant heat barrier and resists punctures. Ideal for use with ThermoSafe foam mailers.