NATURALLY
PRESERVED

Wine made using Wineshield is loaded with potent congeners that neutralise the oxidative molecules that ruin flavor, aroma and color, allowing you to reduce your dependance on SO2.

The Power of Nature

150 year old oak trees are able to avoid rotting, breaking down and spoiling in all types of harsh conditions from hot and dry to wet and cold. It is these same characteristics that allow our wood extract, WineShield to provide a natural potent stabiliser in wine.

The congeners and phenolics contained in WineShield are powerful anti-oxidants that assist in protecting your wine. They scavenge any neutralizing oxidant reactions before they can affect the wine, strengthening the phenol and protein bonds inside to produce more resilient molecular structure in the wine without changing the appearance, taste and aroma.

The Power of Nature

150 year old oak trees are able to avoid rotting, breaking down and spoiling in all types of harsh conditions from hot and dry to wet and cold. It is these same characteristics that allow our wood extract, WineShield to provide a natural potent stabiliser in wine.

The congeners and phenolics contained in WineShield are powerful anti-oxidants that assist in protecting your wine. They scavenge any neutralizing oxidant reactions before they can affect the wine, strengthening the phenol and protein bonds inside to produce more resilient molecular structure in the wine without changing the appearance, taste and aroma.

The price of Shelf Life

Winemaking is the intersection of biochemistry, microbiology, botany and art. Historically consumers were happy with wines that would be aged over far longer periods, today most wine is consumed within months of production resulting in softer, gentler wines that are commensurately susceptible to oxidation, ageing and shelf instability.

Sulfur dioxide, or SO2, remains the most important additive used in winemaking. There are very few wines that are made without some use of SO2. This is because wine is perishable, prone to oxidation and the development of aldehyde off-odors. Whilst SO2 has major processing and shelf life benefit for the winemaker, there are key considerations as to why producers and customers are keen to reduce the use of SO2 in wines, including Health, Taste and Natural challenges.

Today oenological tannins are widely used in the wine industry to improve wine quality. Stoak’s range of new oenological tannins are developed with many specific functions, such as modifying antioxidant effects, color stabilization, aroma and flavor enhancement.

The price of Shelf Life

Winemaking is the intersection of biochemistry, microbiology, botany and art. Historically consumers were happy with wines that would be aged over far longer periods, today most wine is consumed within months of production resulting in softer, gentler wines that are commensurately susceptible to oxidation, ageing and shelf instability.

Sulfur dioxide, or SO2, remains the most important additive used in winemaking. There are very few wines that are made without some use of SO2. This is because wine is perishable, prone to oxidation and the development of aldehyde off-odors. Whilst SO2 has major processing and shelf life benefit for the winemaker, there are key considerations as to why producers and customers are keen to reduce the use of SO2 in wines, including Health, Taste and Natural challenges.

Today oenological tannins are widely used in the wine industry to improve wine quality. Stoak’s range of new oenological tannins are developed with many specific functions, such as modifying antioxidant effects, color stabilization, aroma and flavor enhancement.

Wineshield Benefits

SO2 SO2 Harness the natural preservative of Wineshield to reduce your reliance on Sulphur Dioxide. REDUCE ORGANIC 100% ORGANIC Structan is OMRI and Ecocert certified (USDA standards), making it organic, natural and pure for use in wine. NATURAL FLAVOR CHANGE Structan delivers a refined tannin profile, delivering complexity and structure to your wine. NO FLAVOR LIQUID DOSE LIQUID DOSE Structan is added in a highly convenient, fast acting and effective liquid dose. CONVENIENT SCALPING SCALPING Structan is in liquid form avoiding any flavor or color scalping normally found in tannin powders. NO LOW DOSE TARGETED OUTCOME Wineshield is dosed at very low rates delivering highly targeted results. LOW DOSE VARIETY TYPES OF WINE Structan can be used in a wide variety of wine types and varietals. USED IN ALL INGREDIENTS INGREDIENT Structan only uses the highest quality raw materials sourced from around the world. OUR RAW APPROVED FOR USE Structan is approved for use in most wine markets worldwide as a tannin extract derived from oak wood. APPROVED CONSISTENT RESULTS Structan provides the wine maker fine control delivering predictable, measurable and consistent outcomes. CONSISTENT

Wineshield Testing

Through the most advanced laboratory testings (Electron Paramagnetic Resonance Spectroscopy – EPR) we are able to show a 78% overall reduction in oxidative and staling indicators.

This means that Wineshield is absorbing the oxidative elements , soaking up those same oxidants that interact with flavor, aroma and color molecules. ESR is able to detect the rate at which this is happening and show how this slows, giving you a wine that is more stable and more resilient on shelf.

To find out more about EPR testing follow this link.

SCIENTIFIC TESTING

SENSORY TESTING

Extensive sensory testing was carried out to assess the impact of Wineshield on wine stability and its ability to protect the wine from oxidation, flavor loss and staling.

Testing was carried out in a number of formats including A/B bottle testing pretreated with SO2. 

Dosing Rates

Wineshield dosing is very simple just shake the container prior to addition, and then add at the calculated dosage at Malolactic Fermentation for Red wine and Alcoholic Fermentation in White wine. Wineshield can be also be added into blending tanks later in the process. 

Wineshield is provided in 5,25 and 1000L containers as well as 1L and 5L bottles for sampling purposes.

Dosage should be applied at the rate of 1.5:1000, we have provided a dosage calculator alongside so that the brewer can achieve exact dosing proportions. In cases where winemakers are having major problems with highly sensitive wines or exporting long distances (and time) they have increased the dosage to 2.0ml/L with only improved results.

There are no real consequences to overdosing as Wineshield is GRAS certified (Generally Recognised as safe) however we recommend exact dosing to ensure that the desired level of stabilisation occurs.

Dosing Protocols

Wineshield dosing is very simple just add at the recommended dosage at fermentation. Wineshield does not impact ph, yeast or other winemaking factors. Wineshield contains a level of alcohol so is aseptic with no contamination risks.

Filtration is recommended as part of your typical winemaking activities.

Oak extract

Entirely natural process of manufacture
USDA organic certified
No impact on flavor, color or aroma
Used in a variety of beverage applications
Generally recognised as Safe (GRAS)
Contains antioxidant elements
No astringency

Winemakers have asked us about the potential for flavor change when making use of an oak extract. Winemakers are familiar with tannins and phenolics used in the industry, ours are different.

The key tannin based antioxidants contained in our extract are Hydrolyzable tannins made up of the specific groups of gallic and ellagic acids, these are different to the tannins and phenols that are associated with astringency.

This means that your wine is maintained in exactly the same original way that it was intended.