Is this 100% argon gas, or does it also have nitrogen?

The can says it contains a "custom blend of pure nitrogen (N2), carbon dioxide (CO2) and argon (AR)" It works very well.

How does it work and do you need a special stopper?

Looks like the inert gases displace oxygen to prevent oxidation. You do need a wine stopper to keep the inert gas in and additional oxygen out. Doesn't appear to need to be a special stopper though.

Is preservation performance affected if I lay the bottle on a rack after closing? I have a chiller which doesn't accommodate standing bottles.

No. It doesn't need a thick layer of gas to keep the wine protected as long as it stays still, but you might give it just a little more if it's on its side.

Can someone tell me why simply pouring the wine into a smaller bottle, or half bottle, filling to the brim, wouldn't accomplish the same thing?

It would accomplish the exact same thing...though you are the most industrious win drinker I have ever heard of. This is meant to be a quick and easy way to keep a partially full/empty bottle of preserved in its original bottle. There is always more than one way to skin a cat....this is just one of the easier ways.

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Wine Enthusiast Private Preserv Preservation Spray

Wine Enthusiast Private Preserv Preservation Spray

Product ID: 276662308

Details

Colour
Silver
Brand
Wine
Shape
Cyclindrical
Is dishwasher-safe
Yes
Global Trade Identification Number

⏳Preserves freshness for months

🍷120+ uses per can

🛡️Inert gas blend protects flavor

E£ 7150

Duties & taxes included

In stock

Sold byAmazon EGYPTDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🍾 Seal the moment, savor the legacy.

UNRIVALED LONGEVITY - Enjoy over 120 preservations from a single can—your wine’s best long-term ally.
PURE INERT GAS SHIELD - Custom blend of nitrogen, CO2, and argon locks in flavor without stripping aroma.
VERSATILE PRESERVATION - Safeguards not just wine, but spirits, olive oils, herbs, and fine vinegars too.
NO VACUUM NO COMPROMISE - Unlike vacuum stoppers, it preserves the bouquet essential for a rich tasting experience.
EFFORTLESS ECO FRIENDLY - No batteries or assembly needed—just spray and seal for seamless freshness.

Private Preserve Preservation Spray uses a safe, inert gas blend to protect the flavor and aroma of wine and other fine liquids. With over 120 uses per can, it creates a breathable gas blanket that prevents oxidation without vacuum damage, preserving freshness for days, weeks, or even months. Ideal for wine, spirits, olive oils, and more, it’s the top-rated global choice for effortless, long-lasting preservation.

Specifications

Asin	B0000DCS18
Batteries Required	No
Best Sellers Rank	#239,362 in Kitchen (See Top 100 in Kitchen) #512 in Wine Stoppers
Customer Reviews	4.5 4.5 out of 5 stars (1,212) 4.5 out of 5 stars
Date First Available	6 August 2012
Dishwasher Safe	Yes
Is Assembly Required	No
Item Model Number	481 01 01
Item Volume	8.57 Milliliters
Item Weight	0.01 Ounces
Number Of Pieces	1
Product Dimensions	26.67 x 15.24 x 15.24 cm; 0.28 g

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TrustScore 4.5 | 7,300+ reviews

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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