Maços de gelo seco no Walmart: 2025 Guia especialista
What “dry ice packs at Walmart” actually means
At Walmart, the phrase typically refers to reusable phase‑change packs (PCMs), not literal CO₂ dry ice. You’ll commonly see:
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Tundra de gelo ártico (~5 °F / −15 °C) for deep‑cold/frozen hold,
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Arctic Ice Chillin’ Brew (~28 °F / −2 °C) for drinks/fridge‑cold,
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Sheet‑style liners (Techni Ice / Thermafreeze) you hydrate, freeze, and trim to fit.
Real CO₂ dry ice may be stocked only in certain Supercenters; availability varies by store and season—call ahead or use a brand locator.
Por que isso importa: O freezing point (setpoint) of a pack determines the temperature “floor.” Lower setpoints absorb more heat before thawing, extending hold time—critical for keeping items frozen. Hard HDPE “bricks” stack neatly; flexible sheets wrap odd shapes and eliminate warm voids.
Pick by freezing point & formatar (quick table)
| Walmart option | Ponto de ajuste / Type | Melhor para | What you get |
|---|---|---|---|
| Tundra de gelo ártico | ~5 ° f / −15 °C hard gel brick | Alimentos congelados, O fim de semana segura, Climas quentes | Longest frozen window; pre‑freeze 24–36 h for full charge. |
| Arctic Ice Chillin’ Brew | ~28 ° f / −2 °C hard gel brick | Bebidas, deli, viagens diárias | “Crisp‑cold” without freezing drinks/produce. |
| Igloo Maxcold Ice Block | ~32 ° f water‑based block | Lunch boxes, short errands | Baixo custo, stackable sizes; great everyday add‑on. |
| Techni Ice / Thermafreeze sheets | Hydrate‑freeze sheets | Gap filling, forros, envio | Conformable coverage; reduce hot spots and leaks. |
Independent, 2025‑era tests generally show gel‑based packs outlasting plain water blocks in like‑for‑like space—especially when contents and cooler are pre‑chilled.
Quantas pacotes você precisa?
Quick formula (hard‑sided cooler, tight pack):
Packs_needed ≈ (Cooler_volume_L ÷ 3.5) × (Hold_hours ÷ 24) × Load_factor
Onde Load_factor = 1.0 (tight) • 1.25 (loose) • 1.5 (soft cooler).
Exemplo: 35 L cooler for 36 h, firmemente embalado → (35/3.5)×(36/24)×1.0 ≈ 1.5 → two medium bricks + a sheet on top.
Rule‑of‑thumb by duration (frozen focus, 86 °F/30 °C ambient):
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≤12 h: packs ≈ 10–15% of cooler volume
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24–36h: 20–30%
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48–60h: 30–40%, favor 5 °F packs and add liners
Adjust up for frequent lid openings or >95 °F ambient.
Pro packing pattern (fast wins): Pre‑chill the cooler overnight, lugar bricks bottom + principal, and line walls with sheets to remove dead air. Mix sizes to fill voids near sensitive items.
Shipping food with Walmart packs (Sop)
Para refrigerado (32–40 °F) Remessas, standard gel/PCM packs with good insulation suffice. Para congelado, anchor a low‑setpoint (~5 °F) brick near the product core, line sidewalls with cryosheets, and keep headspace minimal. Many marketplace sellers run Tundra bottom + lençóis laterais + top brick to mimic lab‑style packouts.
Want a deeper dive? See our dry ice pack for shipping food SOP with pack‑to‑product ratios and hold‑time math. (Internal link suggestion below.)
Find them online vs. in‑store + Marketplace tips
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On-line: Start at Walmart’s Pacotes de gelo mais frios category to filter by size, pack count, setpoint, and delivery dates. You’ll also see brand hubs (Arctic Ice, YETI, Igloo).
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Na loja: Check Sporting Goods (near coolers) ou Housewares (lancheiras). Low‑cost Igloo MaxCold blocks are common shelf staples; premium bricks (Tundra/Chillin’ Brew) may be on end‑caps.
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Marketplace vs. Walmart‑shipped: Always check “Sold & shipped by.” Return windows and shipping speed differ for Marketplace sellers. For business purchases, Walmart Business can list dry ice/packaging SKUs by region.
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Gelo seco real? Availability is store‑specific and often seasonal. Use a brand locator (por exemplo, Penguin Brand) or call ahead.
Segurança: reusable packs vs. real dry ice
Reusable packs (water/gel PCMs): non‑toxic contents; if punctured, discard. Hand‑wash and air‑dry before refreezing.
Gelo seco real (CO₂ sólido, −109 °F / -78,5 ° C.): Usar luvas isoladas e Proteção para os olhos, e nunca store in sealed containers—pressure can build to rupture. Always ensure ventilação; CO₂ can displace oxygen and create asphyxiation hazards in confined spaces. Authoritative safety guidance from OSHA/CDC reinforces gloves and ventilation as non‑negotiables.
Regra geral: 1 Libra of dry ice off‑gases a large volume of CO₂; avoid airtight spaces (cars, closets) and dispose by letting it sublimate in open air.
Perguntas frequentes
Does Walmart sell actual dry ice?
Às vezes. Availability is store‑specific; call ahead or use a brand locator if your local store doesn’t stock it.
Which Walmart pack lasts the longest?
Packs with lower setpoints (por exemplo, ~5 ° f Tundra) e higher mass typically hold longer—assuming a pre‑chilled cooler and tight pack‑out.
Are sheet packs (Techni Ice/Thermafreeze) as cold as dry ice?
Não. They’re not −109 °F CO₂, but they’re cold, flexível, e far easier to handle and reuse—great as liners or gap‑fillers.
Can I ship frozen food with Walmart packs?
Yes—for short routes or 24–36 h windows—when you combine low‑setpoint bricks + sheet liners and minimize air gaps. For longer or ultra‑cold needs, evaluate real dry ice and carrier rules.
