Cover balls
The Euro-Matic outdoor cover ball is the best choice for airports, mines, sewage treatment plants and livestock farms, as well as for covering reservoirs.

What is a cover ball? How does it work? What can it be used for? What are the benefits of using it? Where and for which areas can these balls be used effectively? These are all questions we often encounter in our work, so we try to answer them.

Where and for which areas can these balls be used effectively?

  • airports
  • mines
  • sewage treatment and wastewater plants
  • drinking water reservoirs
  • fish ponds
  • fire water reservoirs
  • irrigation reservoirs
  • hazardous substances and chemical tanks
  • heated or cooled open surface tanks
  • livestock farms, slurry pits and lagoons

What are the benefits of using it?

  • covers 91% of the surface
  • wind resistance up to 150 km/h
  • requires no maintenance
  • 10 years warranty
  • Evaporation of liquids can be reduced by up to 90%
  • disguises and hides the open water surface from birds
  • quick and easy installation
  • spread automatically as the liquid level rise and fall
  • thermal insulation layer – heating costs can be reduced by up to 75%
  • reduction of oxygen absorption
  • excellent chemical resistance
  • UV stabilized base material – weather resilient
  • less light enters the liquid, resulting in making worse living environment conditions for algae and plants, that cause degraded water quality
  • allows movement or immersing of equipment in the liquid
  • toxic gases, vapors and unpleasant odors are reduced, which ensures increased life expectancy of building structures and has better environmental affect
  • more stable temperature of liquid; smaller temperature extremes in cold or hot weather

What is a cover ball?

The cover ball is a hollow high quality plastic ball that can be used to create a continuous cover layer on the surface of liquids. Depending on the amount of balls placed on a given surface, they can cover up 91% of the surface in a regular shape, self-arranging next to each other. This cover layer separates and isolates the open surface of the liquid from its surroundings, i.e. it significantly reduces the effect of the liquid on the environment and vice versa. In English, several names are used for these balls, often referred to as ‘shade ball’, ‘cover ball’, ‘armor ball’, ‘barrier ball’, or ‘bird ball’. We, as a proud European Manufacturer, call them cover ball and Bird Ball™.



How does it work? What can it be used for?

The cover balls have countless benefits, so it can be used in many diverse areas. Those advantages usually help our partners to achieve their goals for cost-saving, more efficient water management, safer work environment, environment and nature protection. Thus, the Bird Ball™ is an excellent solution for reducing evaporation, preserving water quality, preventing algae formation, keeping birds away, camouflaging the water surface, thermal insulation, reducing heating costs, reducing the release of toxic gases and vapors, reducing unpleasant odors, covering hazardous materials and many more, where cost savings or other beneficial effects can be achieved as a result of use.


Bird Ball™Water-filled Bird Ball™Self-Filling Ball®
Diameter100 mm100 mm100 mm
Weight40 g240 g40 g
UV resistanceYesYesYes
Warranty10 years10 years10 years
Wind resistanceUp to 80 km/hUp to 150 km/hUp to 150 km/h
PackagingBig-bag, cardboard or in bulkBig-bag or in bulkBig-bag, cardboard or in bulk
Quantity116 balls/m2116 balls/m2116 balls/m2