• Natural cork stopper with a cork powder coating. This operation improves its physical properties, namely its sealing capacity and visual appearance and ensures the sealing of this product.
  • The most suitable option when the objective is to maintain the attractiveness of wine in terms of market price, using a natural cork stopper.


  • Check that the bottling jaws show no grooves or signs of wear
  • Ensure correct alignment of piston and locating ring
  • Ensure that the bottling machine works evenly, especially during compression
  • Regularly clean all surfaces that come in contact with the stoppers with chlorine-free products
  • Ensure that the equipment is adjusted to the stopper you are using
  • At JGR CORK we can suggest the most appropriate cork size by studying the internal profile of your bottle neck, the characteristics of the wine and the bottling conditions
  • We advise you to order your corks for immediate use, not exceeding 6 months after delivery date
  • Corks should be stored in their original packaging in a well-ventilated place with controlled temperature between 15°C and 25°C and humidity between 50% and 70%.
  • Do not leave the boxes and/or bags open with the stoppers
  • Ensure there is no dust before bottling
  • Ensure that the cork is quietly compressed to a diameter of not less than 15.5 mm
  • Ensure that the cork is inserted as soon as possible
  • For bottlenecks with standard measurements, the stopper must be inserted up to 1 mm below the top of the neck
  • The degree of moisture inside the neck of the bottle should be minimised
  • The space between the stopper and the wine must be at least 15 mm at a temperature of 20 °C
  • Do not leave the stoppers in the machine feeder to avoid dust
  • Always use corks with a surface treatment suitable for the type of beverage you are bottling
  • It is necessary to make vacuum to avoid internal pressures
  • After bottling, keep the bottles in the upright position for at least 15 minutes
  • Ideal storage conditions are: temperature between 12°C and 18°C and humidity between 50% and 70%.
  • Keep the basement free of insects
  • Cylinders must be transported upright
  • Storage must not be carried out in installations where there is exposure to sunlight, heated environment and in direct contact with the ground