Szigeti produces wine from contracted growers in Burgenland and Niederösterreich and works closely with their partners to obtain grapes explicitly grown to produce quality sparkling wine. The designation "Österreichischer Sekt g.U." (Austrian Sekt with Protected Designation of Origin) applies to the entire production.

Grüner Veltliner Brut is hand-harvested from contracted growers in Burgenland and Niederösterreich. Alcoholic fermentation with Champagne yeasts in stainless steel tanks precedes second fermentation in bottle and twelve months aging en tirage. Riddling is by gyropalette, and the dosage is with local sweet wine.