151 Camino Dorado, Napa, CA, United States of America, 94558
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Diam Bouchage Continues Its Innovation and Environmental Commitment with Launch of Innovative New Products
New Closure Solutions Unveiled at 2025 Unified Wine and Grape Symposium
Napa, 01/23/25 – Diam Bouchage, the leading manufacturer of technical cork closures for still wines, sparkling wines and spirits, is proud to announce the launch of its latest innovations at the 2025 Unified Wine and Grape Symposium. With a 20-year legacy rooted in the revolutionary DIAMANT® process, Diam Bouchage has consistently prioritized research and development, transforming the cork closure market with a focus on oxygen management, natural raw materials, and closure aesthetics.
In 2017, Diam Bouchage introduced the Origine by Diam range, an innovative solution combining a beeswax emulsion and a 100% plant-based polyol binding agent with cork granulates. This range offers a natural closure solution while maintaining the reliability of Diam® closures in terms of organoleptic security, consistency, and controlled permeability. Today, the French cork closure manufacturer announces its bio-based range expansion from Diam Origine 30, 10, 5 to introduce Diam Origine 3. The Diam 3 Origine, an affordable option available now, offers a 3-year mechanical guarantee —or a 6-year guarantee when stored at 58°F – and features a slightly higher oxygen input, making it suitable for both long-aging and faster-moving wines.
Collection by Diam: Crafting a Unique Closure Without Compromising DIAM Performance
Building on its commitment to innovation, Diam Bouchage is excited to present the Diam Collection closure. This unique product features a core of Diam technical cork, elegantly clad with a thin sheet of carefully selected cork, which is then treated with the DIAM cleaning process using Supercritical CO2. The high-precision cladding technique, developed exclusively by Diam, ensures each closure meets the technical and aesthetic expectations of winemakers. The Diam Collection is free of TCA, the compound responsible for cork taint.
Christophe Loisel, R&D Director at Diam Bouchage, states, “The Diam Collection addresses the challenge of assessing the true quality of traditional closures. Our meticulous manufacturing process guarantees consistent mechanical performance and oxygen transfer, empowering winemakers to control the aging of their wines.”
The Diam Collection closure will be available at the end of 2025, initially in a DIAM 30 49 mm size.
G3 Enterprise is the exclusive distributor of Diam for North America, ensuring that these innovative products are accessible to winemakers across the region. Attendees of the 2025 Unified Wine and Grape Symposium are invited to visit the Diam booth 508 and G3 booth 600 to learn more about these groundbreaking products and view samples.
About
With more than 1 billion closures sold annually around the world, DIAM Bouchage ranks as the leader in TCA free* cork manufacturer's for the wine industry and is engaged in all major wine-producing countries.
Diam Bouchage is part of Oeneo group, which included Seguin Moreau cooperage, DIAM Bouchage produces a range of technological corks for still wines, sparkling wines and spirits.
As a leading innovator in developing effective wine closure solutions, DIAM Bouchage collaborates with some of the world's great viticulture institutions in both research and product development.
DIAM provides a secure closure with huge performance benefits, allowing our clients to close their wines with confidence. We have concentrated our efforts on two real threats to the wine industry: closure consistency with adapted OTR (Oxygen Transfer Ratio) and absence of released TCA.
Diam®, a tribute to the winegrower's art
Perfectly preserved aromas and flavours.
Although supercritical CO2 technology was already being used in some industrial applications (decaffeination, nicotine extraction from tobacco, etc.), it took 7 years of joint research with the CEA (French Atomic Energy Commission) before it could be applied to cork, thus giving rise to DIAMANT® technology, a proprietary cork taint removal process.
Thanks to DIAMANT® technology, the cork used in Diam® closures is free of flavour, void of TCA (the cork taint molecule) plus many other substances causing flavour modification. Stringent testing at every stage of
production means that Diam® is the only cork individually guaranteed free of releasable TCA (< than the measurable limit of
0.3 ng/l). The sensory purity and neutrality of Diam® closures protect all the wine's subtlest notes.
Total control over the way wine evolves.
Customised, tested permeability: Every wine has its own permeability requirements and nobody knows how much oxygen a wine needs better than the winemaker. The different versions of Diam® closures, give you total control over oxygen transfer and guarantees its constancy for the entire life of the wine in the bottle.
Consistency: The Diam® manufacturing process delivers perfectly consistent technical performance from one cork to the next. This provides smooth application at bottling, eliminates dust, suspended particles as well as leaking, seeping bottles and rising moisture.
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| Locations | Address | State | Country | Zip Code |
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| Diam Closures | 151 Camino Dorado, Napa | CA | United States of America | 94558 |
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