UF25 single piece natural wine corks

Our best Single Piece All Natural Wine Cork from MA Silva carries the manufacturer's strength rating UF25, a high grade. Natural wine corks are preferred for long aging wines.  Being made from a single piece of cork means you're getting superior durability and longevity, which translates to more confidence in the shelf life of your wine.

If you are bottling white wine, more delicate red wine, or don't expect to keep your bottles corked for over five years, our Twin Disk Corks or Pearl Micro Agglomerated corks may be a more appropriate choice while maintaining high quality.

If you are uncertain which cork type is the best choice for your wine, please read our discussion on Managing Oxygen Before & After Wine Bottling.  This article includes a vital discussion that will help you identify the best cork for your circumstances.


Click to read the discussion which includes a comparison of wine cork options.


To ensure we are providing our customers with fresh and excellent quality corks, we generally keep no more than a two month stock of corks on hand. The corks are manufactured upon request for us, thus you can rest assured that the corks we are providing you are recently manufactured and packaged. Once in your possession, you should take care to reseal if possible and store your corks cool---ideally 59 ºF - 68 ºF. It is best to use your corks within 6 months.

About the Manufacturer - M.A. Silva

M.A. Silva aims to exceed the highest standards set in the industry regarding TCA (tricloroanisole)---they have developed an innovate custom-designed cleaning process that volatilizes potential TCA and other off-aroma molecules during the manufacture of their corks. They been voted the best cork supplier multiple time by Vineyard and Winery Management Magazine.  They are certified and follow rigorous quality testing standards.  The Beverage People has supplied home and commercial winemakers with their high quality corks for decades.


General Specifications:

  • Material: 100% Natural Cork
  • Composition: Single Piece
  • Dimensions: 1.75 in. x .95 in. / 24 mm x 45 mm
  • Physical Moisture: 4%-7% moisture content
  • Manufacturer: M.A. Silva

Considerations for Oxygen Management:

  • Estimated oxygen contribution from insertion: 1.0-1.3 ppm
  • Estimated oxygen transfer rate (OTR): about 0.1 ppm/month

Longevity in the Bottle:

  • Estimated cork life in a properly stored wine bottle: 10-15 years

Storage before usage:

  • Use before: 6 months
  • Storage humidity: 40% - 70% RH, non-condensing
  • Storage temperature: 59 ºF - 68 ºF (15 ºC - 20 ºC )


We are not happy unless you are. To ensure your satisfaction, we offer our guarantee backed by our promise of a full store-credit refund on any unsatisfactory product or delivery---no need to ship anything back. Simply email us at info@thebeveragepeople.com if the need to claim this guarantee should arise.

Pickup Locations Available for This Item

The Beverage People Warehouse, Santa Rosa.

Fulfillment occurs Tues-Fri, 10AM-5:30PM, and Sat, 10AM-3PM. We aim to fulfill orders in 2 hours or less, whenever possible.

 Click for details about our pickup location.

Shipping Details
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How to Return Goods for Refund

All our supplies are guaranteed for one year. Request for refunds occurring more than 30 days after the date of purchase on non-defective goods may be granted as a store credit if the goods are returned in their original condition. Yeast is perishable and should be refrigerated on arrival. No refunds are allowed on sales of living organisms such as yeast and bacteria.


Average rating:
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Featured positive reviews:

average rating 100%
Speedy service and great products 08/26/2021
By Donna Bettencourt
Once again The Beverage People saved the day. Ready to bottle my 2018 5 Portughese varietal port and found I only had dual disc. So visited our local shop and bought what the told me were natural corks. When I got them home found they were below grade natural corks filled in with cork dust and glue. Not what I wanted for a port I hope to drink on my death bed 20 years hence. Ordered from Beverage People and received natural cork within two days. Tragedy averted. Thank you!