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.

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

Advantages

  • 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.

Advantages

  • 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

Advantages

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

General Bituminous Membrane Build-Up

The combination of raw materials can be built up in thousands of possibilities, but this is a typical composition example.