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.

of the flat roof market worldwide is dominated by bitumen technologies.
In some countries, bitumen dominates over
of the flat roof market.

Typical Application Fields for Bitumen

Comet hangar roof after renovation of bitumen roof


Bitumen Terrace of Residence building in Muehlau Kirchgasse


Man applying bituminous membrane on a building basement

Below-Grade Structures

Bituminous Membrane Basement from Outside


Application of bituminous membrane on a podium


Bridge in Klosters Switzerland

Bridge Decks

Post-applied Bituminous Membranes

SikaShield W

An innovative bituminous membrane which is bonded to the concrete substrate with a special modified cement-based adhesive.

Products :  
SikaShield® W159SikaShield® W1


Main Uses

With this unique system, the most common challenges on waterproofing below ground structures are overcome, providing an effective, easy and simple application for all seasons and job requirements.

  • Easy to applied: Minimum substrate preparation
  • Fast installation: Can be applied on green concrete
  • All seasons: Application can continue once the rain stops
  • Safe to install: Application in confined spaces and/or walls is simple, easy and effective
  • Fully bonded: Completely adhered to the substrate
  • High adhesion: Excellent peel adhesion to the concrete surface

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.

Products : 
Sika® MultiSeal AP

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