duo5 De Boer is a worldwide producer of bituminous roofing membranes for flat or sloped roofs, podiums, car parks, bridges or tunnels. Our experience of innovative applications dates back to 1922: De Boer offers architects, roofers and property owners a broad range of systems for total watertight solutions, with guarantees from design to maintenance on the roof.
rpm-s RPM International Inc. is a multinational holding company with subsidiaries that manufacture and market high-performance coatings, sealants and specialty chemicals, primarily for maintenance and improvement.
spetec Spetec are manufacturers of polyurethane injection resins for water sealing and soil stabilisation. Spetec offers high-quality products for the civil engineering to stabilise soils, rock and seal water ingress in all types of structures. Spetec products are mainly used in tunnels, mining, metro systems, excavations, dams, ground barriers and foundations.
  Velosit specialises in materials for new construction of structures in contact with water, new construction and renovation of water tanks, leveling of concrete floors, renovation of civil engineering structures, new construction and rehabilitation of sewage treatment plants, renovation of sewage manholes, repair of sewage and other pipelines with new materials and technologies being developed continually.