UniHeat 40 Hour Multi-Purpose Shipping Warmer – Heat Packs (4 Pack)

Features

• Convenient 4-pack for hobbyists, small sellers, and trial shipments
• Provides up to 40 hours of steady, reliable heat—ideal for overnight and 1–2 day routes
• Versatile: supports live reptile shipping, tropical plant shipping, aquarium fish & corals, and insect & invertebrate orders
• Oxygen-activated—open wrapper, introduce air, and reach working temp in ~15–30 minutes
• Single-use, non-toxic, and disposable for simple cold-weather and shoulder-season logistics
• Trusted by pet shops, breeders, nurseries, and aquatics vendors for consistent performance

Product Description

The UniHeat 40 Hour Multi-Purpose Heat Pack – 4 Pack delivers gentle, consistent warmth for short to mid-length transits. Perfect for overnight and two-day deliveries, these oxygen-activated heat packs help protect reptiles, tropical plants, aquarium livestock & corals, invertebrates, and other temperature-sensitive cargo during cooler weather.

Activation is simple: open the wrapper, shake lightly to introduce oxygen, and allow 15–30 minutes for the pack to ramp up before loading into an insulated shipper with modest ventilation. Choose this 4-pack when you want enough coverage for a few shipments without committing to a larger bundle.

Need more time? Step up to our 72-hour or 96-hour formats for longer routes or harsher winter conditions.

FAQs

When should I use 40-hour vs. 72- or 96-hour warmers?

Use 40-hour for overnight and 1–2 day shipments in mild to cold weather. Choose 72-hour for typical 2–3 day routes and 96-hour for 3–4 day or harsh winter transit.

How long do I pre-activate the pack?

Allow 15–30 minutes after opening to reach steady output. Avoid smothering—maintain a small air gap so the pack receives oxygen.

Do I need ventilation holes in the shipper?

Yes. These are oxygen-activated warmers. Provide small ventilation holes or an internal air gap to keep the heat output consistent during transit.

How many 40-hour warmers per box?

For compact, insulated shippers, one is often sufficient. Use two or more for larger volumes, colder routes, or higher heat demand—space warmers for airflow.

Are these safe for reptiles, plants, fish, corals, and insects?

Yes—when used properly. Avoid direct contact with animals or foliage. Validate your packing method with a thermometer before live or high-value shipments.

How should I store unused warmers?

Keep sealed in a cool, dry, low-humidity environment. Follow the printed best-by date and avoid exposing unused packs to air until ready to ship.