Polimac® Reno® / Castoro® Mattresses are manufactured to EN 10233-3 and SANS 1580 standards with hexagonal woven wire mesh Type 60, commonly referred to as double twist wire mesh.


The steel wire is protected by a Zinc Alloy (Galfan) and an innovative polymeric coating extruded over the galvanized wire in order to achieve long lasting structures. Polimac® Reno® / Castoro® Mattresses are able to withstand water velocity up to 6.5m/s.


They are manufactured in compartments of 1m in the flow direction in order to reduce migration of rock and the diaphragms are formed by folding the base, ensuring a higher rigidity and reducing deformation under high flow conditions.


For low aggressive hydraulic environments, the Class A Zinc coated or Galfan coated Reno® / Castoro® Mattresses may be used.


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