Bluemont Rock Bags™
Bluemont Rock Bags™ are flexible mesh bags used for scour and erosion control, supplied by Bluemont in Australia, New Zealand and the Pacific Region.
Last updated September 16, 2026
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Overview
Bluemont Rock Bags™, known as Kyowa Filter Units outside the region, are flexible mesh bags used for scour and erosion control. They are made by Kyowa and supplied by Bluemont, which describes itself as Australia's leading supplier of environmental crisis management solutions. The bags are used on bridges, roads, railways, embankments, culverts, shorelines and rivers, and are filled with rock or riprap to form a flexible protection system positioned as a sustainable alternative to gabions, large rock, blockstone, free riprap and rock mattresses. They require no foundations or ground/bed preparation and are made from 100% recycled material.
History
Bluemont Rock Bags™ are made by Kyowa and supplied by Bluemont. The official site states that over 1,000,000 Bluemont Rock Bags™ have been installed since 1987, and that since 2016 Bluemont has supplied the bags for government and private sector projects. Clients cited include local government agencies, road development authorities, ports, construction companies and industrial companies. Applications mentioned include protecting Offshore Navigational Aids in the Great Barrier Reef region, disaster management following the Wamberal Beach Erosion, and scour protection for the Wave Swell Energy Unit at King Island.
Products and positioning
Sustainable environmental civil engineering alternative to gabions, large rock, blockstone, free riprap and rock mattresses; rapid fill and rapid deployment.
Bluemont Rock Bags™
Flexible mesh bags filled with rock or riprap for scour and erosion control, made from 100% recycled material.
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