Integra Boost 51mm Round Humidity Packs Sit Flat in a Jar Lid
A rectangle and a disc solve the same problem in different places. The rectangle lies among the contents; the disc seats inside a screw cap or a lid liner, above them. That is the whole argument for the round format, and it matters most for anything that marks, compresses or sticks to a flat packet. This is the 51 mm size, covering up to 7 g and holding 62% RH. It will also sit among the contents if a closure has no room. The lid position is an option rather than a requirement. The fill is the ordinary Integra blend, plant-based glycerin and water with no salt in it.
Round Humidity Packs for Jars, and Picking a Diameter
Diameter follows the closure, and coverage follows the contents, and the two do not always agree. The 51 mm lies flat across a wide-mouth cap where a smaller disc would leave gaps. Integra makes the discs in several diameters, and 37 mm, 45 mm and 51 mm are stocked here. Both smaller discs cover 3.5 g, so stepping down in diameter also steps down in capacity. If the cap is wide but the jar holds an eighth, the 51 mm is more pack than the job needs. Check a disc against your own closure before committing to a case. This one ships 3,500 packets loose, with no overwrap and no indicator cards. That is what keeps the per-unit cost where a capping line can run it. The whole case goes live the moment it is opened, so plan the run before cutting into it.
Key Features
- 51 mm Round Format: Seats inside a screw cap or lid liner instead of lying loose among the contents.
- Covers Up To 7 g: Matched to a small jar, roughly double what the 37 mm disc handles.
- 62% RH Two-Way Control: Adds moisture to a jar that has dried down and pulls it back after the lid has been off.
- Can Keep the Pack Off the Product: Lid mounting suits anything that marks, compresses or sticks to a flat packet.
- 3,500 Packets Per Master Case: Line volume for a capping or packaging operation rather than a retail shelf.
- No Overwrap, No Indicator Card: The bulk trade-off that brings the per-packet cost down for line work.
- 100% Salt-Free Formula: Plant-based glycerin and water, so no salt residue transfers to the contents.
- Spill-Proof and Tear-Resistant: Stays pliable through automated capping and hand assembly without splitting.
- FDA Compliant, Food Grade Inks: Cleared to sit in direct contact with the product it is packed beside.
- Also Stocked at 37 mm: The smaller disc covers 3.5 g, for narrower closures and single-eighth containers.
Technical Specifications
| Specification | Value |
|---|---|
| Format | Round disc |
| Diameter | 51 mm |
| Relative Humidity | 62% RH |
| Humidity Control | 2-way (releases and absorbs moisture) |
| Coverage per Packet | Up to 7 g of contents |
| Placement | Inside a jar lid or cap, or among the contents |
| Quantity per Case | 3,500 packets, bulk packed loose |
| Individual Overwrap | None — packets ship unwrapped |
| Humidity Indicator Card | Not included in this configuration |
| Other Round Size Stocked | 37 mm, covering up to 3.5 g |
| Composition | Plant-based glycerin and water |
| Salt Content | 100% salt-free |
| Biodegradability | 99% biodegradable |
| Toxicity | Non-toxic; emits pure water vapor only |
| Food Contact | FDA compliant and safe for food contact |
| Printing | Food grade inks |
| Membrane | Spill-proof, tear-resistant, pliable |
| Flavor / Aroma Impact | Does not alter flavors or aromas |
| Shelf Life (sealed case) | 2 years from date of manufacture |
| In-Use Life | Typically 2–4 months |
| Technology | Patented 2-way humidity control |
| Manufacturer | Integra by Desiccare, Inc. |
| Manufacturer Part Number | B51M62J |
| Documentation | ISO and QPL documentation available from the manufacturer on request |
| SKU | B51M62J |
Why Use a Round Pack Instead of a Rectangle?
It can seat inside a lid. A rectangular pack folds against a round closure and takes up headspace, so it has to sit among the contents.
How Much Does a 51mm Disc Cover?
Up to 7 g. The 37 mm disc covers 3.5 g, so the choice follows container size rather than closure diameter alone.
Does This Case Include Indicator Cards?
No. Packets ship loose with no individual wrapper and no cards, which is what keeps the per-unit cost down at line volume.
Will a 51mm Disc Fit Any Lid?
It suits wider closures where the smaller disc leaves gaps. Check it against your own cap before committing to a full case.