Bitumen, also known as asphalt, is a sticky, black and highly viscous liquid or semi-solid form of petroleum. Thanks to its waterproofing qualities, it is widely used in construction. Bituminous membranes are perfect for waterproofing roofs, basements, below-ground structures, bridges and other structures.

Typical Application Fields

For Bitumen Roofs

Close up view of bitumen membrane applied on roof at parapet

Flat Roofs

Bitumen Terrace of Residence building in Muehlau Kirchgasse


Sika flooring system in parking garage Lammermarkt in Leiden Netherlands

Parking Levels

Comet hangar roof after renovation of bitumen roof

Pitched Roofs

Builiding with green roof in the mountains

Green Roofs

Two workers rolling SikaBit bitumen membrane apply on roof

Roof Renovation

For Bitumen Waterproofing

Bituminous Membrane Basement from Outside


Man applying bituminous membrane on a building basement

Below-Grade Structures

Application of bituminous membrane on a podium


Bridge in Klosters Switzerland

Bridge Decks

Waste water treatment plant in Wroclaw in Poland

Tank Lining

Torch-applied Bitumious Membranes

Bituminous waterproofing membrane

Once applied, Sika's bituminous membranes are a thin layer of watertight material fully-bonded to the surface. It is a flexible system, able to maintain its waterproof capacity without causing cracks.

Main Uses

  • Retaining walls, basements and below-ground structures
  • Flat roofs under protective layers of ballast
  • Balconies and terraces under tiles
  • Wet areas
  • Underground car parks
  • Bridges
  • Raft slabs and foundations
  • Protection of various substrates in a wide range of applications


  • Fully-bonded system
  • Resistant to the most extreme weather conditions
  • Ease of maintenance
  • Excellent mechanical properties
  • High resistance to mechanical damage and punctures

Self-adhesive Bituminous Tapes

Application of self-adhesive bituminous tape

Sika also has self-adhesive, polymer-modified bituminous sealing tapes which are laminated with aluminum foil on the upper side and contain no reinforcement.

Main Uses

  • Sealing and repairing building cracks, roofs, sheet metal work, bituminous felts and other types of roofing sheet membranes.


  • No torch needed
  • UV-resistant
  • Excellent watertightness
  • Multi-purpose tape
  • Flexible and easy to apply
  • Safer, faster installation

Bitumen LAM (Cold-applied, Liquid -applied Membrane)

Application of cold-applied bitumen membrane with a hand trowel

Bitumen liquid-applied membranes are the perfect solution for seamless, fully-adhered and safe systems. They are polymer-modified bitumen emulsions which require no torch or flame to be applied. They are available as water-based or solvent-based coatings.

Main Uses

  • Below-ground areas facing ground moisture, such as foundations
  • Wet areas
  • Renovation projects
  • Detailing
  • Typically used for residential and industrial buildings
  • As an adhesive to bond lightweight thermal insulation


  • No torch needed
  • Fully-bonded, seamless system
  • Crack-bridging capability
  • Safer, faster installation

Build-Up of Sika Bituminous Membrane

Bituminous membranes are a versatile technology. The correct combination of raw materials and layers can offer a variety of performance and durability aspects, therefore allowing it to be used in a wide range of applications. This is just one example of the build-up of bitumen membrane.