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.

 
Bitumen technology dominates approximately
60%
of the flat roof market worldwide.
In some countries, bitumen accounts for over
80%
of the flat roof market.

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.

Typical Application Fields

For Bitumen Roofs

Flat Roofs

Terraces

Parking Levels

Pitched Roofs

Green Roofs

Roof Renovation

For Bitumen Waterproofing

Basements

Below-Grade Structures

Podiums

Bridge Decks

Tank Lining

Torch-applied Bituminous Membranes

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.

See the general bituminous membrane build-up below.

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 Membranes

Self-adhesive bituminous membranes are covered by a release liner, which is removed during application.

Main Uses
  • Wood substrates
  • Flammable areas
  • Small areas, vertical surfaces or those areas with difficult access
  • Retaining walls, basements and below-ground structures
Advantages
  • No torch needed
  • Safer, faster installation
  • No special equipment needed
  • Excellent adhesion, even at low temperatures

Related Bitumen Technologies

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.

Self-Adhesive Bituminous Tapes

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

Hot Melt Bitumen

Bitumen hot melt is a polymer-modified bitumen, either elastomeric or plastomeric, packed in a solid block state. For application, the block is heated and applied onto the substrate, forming a fully-bonded waterproofing layer.

Key Brands

SikaShield®
SikaShield® Hot Melt
Sika® Igolflex®
Sika® MultiSeal®

Sika’s Experts Provide Assistance to Benefit your Business

Unique Services

  • Wide range of tailor-made solutions
  • Analysis of leaks in existing structures
  • Concepts, specifications and detailing
  • Site specific solutions, application training and on-site support
  • Proven quality control systems
 

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