MAS_Cork_Natural MAS_Cork_Silktop MAS_Cork_Pearl MAS_Cork_Spark MAS_Cork_Bartop  
Natural Corks Silktop® Pearl® MicroAgglo Sparkling Wine Corks Bartops  

Sparkling Wine Corks

M.A.Silva corks are used by some of the finest sparkling wine makers in the world.
Sparkling wine offers challenges for closure products. The closure must withstand higher pressures while maintaining consistent and specified insertion and extraction forces. Its visual appearance is critical, given the aesthetic emphasis placed on sparkling wine packaging. The product must possess the strength to remain intact during twisting extraction, while being pliable enough to offer a lasting seal.

Our sparkling wine cork is composed of a SARA® sterilized micro-agglomerated cork body, and double disks of natural cork on the end that comes in contact with the sparkling wine. We use only approved food-grade bonding agents. The composite body consistently meets stringent visual and mechanical standards, both at the individual part level and after forming. The quality of the body is standard and uniform across all the grades, with the visual appearance of the natural cork ends determining the quality grade of the stopper.

This stopper is specifically designed to seal sparkling wines, beer and carbonated drinks.

Sparkling Corks are offered as 30.5x48 mm.
Custom diameter corks are available to winemakers with specific requirements.

The 5 grades offered are, in descending order, "Flowers", “A”, “B”, "C" and “D”. Each class is defined by the visual quality of its double natural cork disk ends.

We also offer Micro Agglo and Agglo with no discs.




Sparkling wine corks are designed to maintain an effective seal for multiyear extended aging of sparkling wine.

Technical Specifications

  • Dimensional
  • Length: Nominal ± 0.5 mm
  • Diameter: Nominal ± 0.4 mm
  • Ovalization: <0.4mm


  • Moisture: 5%-7% moisture content
  • Dimensional Recovery: >96%
  • Density: 280 Kg/m3 ± 40
  • Resistance to boiling water: No disintegration


  • Sealing Ability: No leakage at 1.2 bar
  • Capillarity: 0 mm
  • Torsion: ≥35º
  • Shearing strength: ≥ 6 daN/cm2


  • Use before: 6 months (coated corks only)
  • Storage humidity: 40% - 70% RH, non-condensing
  • Storage temperature: 15ºC - 20ºC, 59ºF - 68ºF
  • Location: Store in a clean, well ventilated, odorless place away from chlorine products.

  Technical Product Sheet - Sparkling