Polar Tech Rigid Foam Refrigerant Pack RB15 — 4.5" x 4" x 1.5", Case of 6, Reusable Non-Toxic Cooling

Polar Tech RB 15 Re-Freeze-R-Brix is a reusable rigid foam refrigerant pack that holds its shape frozen or thawed to keep chilled and frozen items at stable temperatures during transport and storage.

Designed for shippers, retailers, and home users who need a dependable cold source, the RB15 Re-Freeze-R-Brix combines a dense, rigid foam core with a durable, sealed plastic pouch. The pack measures 4-1/2" long by 4" wide by 1-1/2" thick and is sold as a case of six units. It’s non-toxic, economical, and engineered to protect perishable goods in insulated containers, offering a balance of thermal performance and reusability without relying on gels or loose ice.

How does this refrigerant keep items cold without leaking or melting into a mess?

The RB15 uses a rigid foam composition sealed inside a heavy-duty plastic pouch so it never turns into a free liquid that can leak. Even when it warms up, the pack retains its shape, preventing spills and simplifying handling.

• Rigid foam core that stays solid or intact when thawed
• Durable sealed pouch prevents leakage and punctures
• Maintains physical integrity for repeated freeze/thaw cycles

Will one pack last long enough for shipping and short-term storage?

Yes — the RB15 is built for extended cooling periods when used inside properly insulated containers. Its dense foam structure slows thermal transfer, keeping frozen goods chilled for longer than many gel packs of similar size.

• Optimized thickness and density for longer chill times
• Best performance inside insulated boxes or coolers
• Works well for same-day deliveries and short refrigerated transports

Is the Re-Freeze-R-Brix safe and reusable for repeated shipments?

This refrigerant is non-toxic and designed for multiple use cycles. After thawing you simply refreeze the pack; its rigid foam will hold shape and function through many shipments, making it an economical choice for businesses.

• Non-toxic, sealed design for safe handling
• Reusable across many freeze/thaw cycles to lower recurring costs
• Easy to clean and store between uses

How does it protect against over-freezing as well as thawing?

Polar Tech Re-Freeze-R-Brix not only prolongs cold conditions but can moderate extremes when packaged correctly. Warming packs release stored heat gradually, helping prevent fragile products from freezing solid, while frozen packs keep items chilled without sudden temperature swings.

• Packed with thermal mass to buffer temperature changes
• When warmed, releases heat slowly to reduce freezing risk
• When frozen, sustains low temperatures to prevent thawing

Who is this for: The RB15 Re-Freeze-R-Brix suits ecommerce food sellers, caterers, pharmaceutical shippers (non-medical use), laboratory couriers, farmers markets, and household users who need a compact, dependable cold source. It’s ideal whenever you need a non-leaking, reusable refrigerant that keeps products chilled in insulated containers without the mess of ice.