Hydroflex PU


The Bitumer Hydroflex system is an innovative and modern approach to waterproofing coatings. The system includes 3 steps that ensure high mechanical, thermal and chemical resistance for long-term use. Hydroflex is widely used in the protection of roofs, terraces, balconies, verandas, sub-tile waterproofing of swimming pools, indoor and outdoor waterproofing, protection of concrete structures, tunnels, platforms, bases, protection of polyurethane foam insulation, and as insulation for flowerbeds and planting boxes.
Due to its high adhesion to many substrates, the Hydroflex System makes it possible to protect old roof coatings made of roofing paper, EPDM, PVC or made of acrylic, without the need to tear off and remove the old covering, thus significantly reducing labor costs.

HYDROFLEX liquid polyurethane waterproofing system is excellent wherever open flames cannot be used during the application of hot-welded membranes, such as gas stations and other facilities associated with the distribution of fuels or flammable materials.

This also applies to historic buildings. The HYDROFLEX system will also be an ideal and convenient solution for waterproofing roofs where it is very difficult or even impossible to use roll insulation materials such as tar paper or membrane due to the large number of different technical installations.

HYDROFLEX liquid waterproofing will also make it 5 times faster to treat roof penetrations or footings on which various technical structures are based.


A one-component light gray polyurethane-based membrane used for permanent waterproofing. Hydroflex PU is based on pure elastomeric, hydrophobic polyurethane resins giving excellent mechanical, chemical, thermal and UV resistance.
The product polymerizes when exposed to moisture from the air.

Key features:
  • simple application (one ingredient, ready to use),
  • no need to tear off the old roofing,
  • has excellent adhesion to dry substrates (concrete, tar paper, eternit, steel structures, etc.),
  • high durability of at least 15 years,
  • the ability to bridge cracks up to 2 mm,
  • it can be applied to damp surfaces without reducing adhesion,
  • retains its mechanical properties in the temperature range from -30°C to +80°C,
  • in case of mechanical damage to the membrane, it can be easily repaired in a few minutes,
  • resistant to standing water,
  • sunlight resistant,
  • resistant to root  penetration  – is used for waterproofing green roofs,
  • resistant to microorganisms,
  • resistant to detergents, oils, seawater and household chemicals,
  • after drying, it forms a uniform strong  and flexible coating resistant to chemical  agents, oils, kerosene, acids  and alkalis.

Bitumer Hydroflex PU is used as a compound in waterproofing areas:

  • roofs and terraces,
  • balconies and verandas,
  • sub-tile waterproofing of swimming pools,
  • interior and exterior waterproofing,
  • protection of concrete structures, platforms, tunnels, bases,
  • protection of old roof coatings made of felt, EPDM, PVC, acrylic coatings,
  • provides a reflective surface that reflects sunlight and reduces heat absorption on the roof,
  • polyurethane foam insulation protection,
  • waterproofing of flowerbeds and planting boxes.

Hydroflex PU can be applied to the surface by hand using a brush, roller or brush.

  • 6kg metal pails,
  • 25 kg metal pails.

Contact us now!

Phone: +48 793 707 350