SikaProof® A+ 12

FPO sheet membrane for pre-applied fully bonded below ground waterproofing

SikaProof® A+ 12 is a polyolefin (FPO) based sheet membrane for below ground waterproofing of reinforced concrete structures. It is loose laid onto prepared substrates or formwork before fixing reinforcement and casting concrete. A special hybrid bonding layer on the membrane forms a permanent bond with the fresh concrete. Overlap joints are sealed using cold-applied tapes or by thermal jointing. Thickness 1,2 mm. Suitable for use in hot and tropical climatic conditions.

  • Pre-applied: Fixed before placing reinforcement and casting concrete
  • Dual bond: Mechanical and adhesive bond with fresh concrete
  • Fully and permanently bonded to the reinforced concrete structure
  • No lateral water migration between the concrete structure and the membrane system
  • High watertightness tested according to various standards
  • Easy to install with fully adhered joints
  • Cold-applied or thermally jointed
  • Temporarily resistant to weathering and UV exposure during construction
  • Resistant to aging
  • High flexibility and crack-bridging capabilities
  • Resistant to aggressive conditions in natural ground water and soil
  • Can be combined with other approved Sika® Waterproofing / Joint Sealing Systems