Product Data Sheet Safety Data Sheet Show all documents

SikaProof® Bentonite

NATURAL SODIUM BENTONITE BELOW GROUND WATERPROOFING SYSTEM

SikaProof® Bentonite is a needle‐punched thermally locked Geosynthetic Clay Liner (GCL) used to waterproof below ground concrete structures. It is a waterproofing system which efficiently protects reinforced concrete structures, preventing the penetration of water and subsequent attack by aggressive chemical substances present in the surrounding soil. SikaProof® Bentonite is manufactured in Australia in accordance with the ISO 9001:2000 Quality Management System and consists of high quality polypropylene geotextiles and premium grade natural sodium bentonite. It is fibre‐reinforced by needle‐punching the product across its entire length and width. The high strength fibres are then thermally locked to ensure the high self‐confining properties of SikaProof® Bentonite.

  • BRANZ Appraised (Appraisal No. 612 [2008] )
  • Rugged and durable needle‐punched geotextile
  • Can be installed in almost any weather
  • High shear resistance, less prone to damage on site
  • Self healing membrane if ripped or punctured
  • Waterproof
  • Excellent chemical resistance
  • Will swell into and seal cracks that form in concrete
  • Can be applied directly to piled basement walls and existing property lines
Product Data Sheet Safety Data Sheet Show all documents

Usage

SikaProof® Bentonite is ideally suited to:
  • Conventional construction waterproofing applications
  • Applications where concrete is poured directly against the waterproofing system
  • Where other traditional types of barriers are susceptible to mechanical damage
  • Cast in‐situ floors and walls
  • Precast panel walls
  • Foundation pile sealing
 

Advantages

  • BRANZ Appraised (Appraisal No. 612 [2008] )
  • Rugged and durable needle‐punched geotextile
  • Can be installed in almost any weather
  • High shear resistance, less prone to damage on site
  • Self healing membrane if ripped or punctured
  • Waterproof
  • Excellent chemical resistance
  • Will swell into and seal cracks that form in concrete
  • Can be applied directly to piled basement walls and existing property lines

Packaging

The SikaProof® Bentonite System is made up of the following items, each sold separately:

System Component

Packaging

SikaProof® Bentonite

1.1m wide x 10m roll

SikaProof® Bentonite

2.2m wide x 10m roll

SikaProof® Bentonite Paste20 litre pails
SikaProof® Bentonite Powder25 kg bags

Colour

Yellow/black

Product Details

Product Information

Composition

Needle‐punched geosynthetic clay liner

Storage conditions

  • Rolls of SikaProof® Bentonite Sheet should always be stored lying flat, continuously supported clear of direct ground contact and should never be stored standing on one end.
  • Store, handle and freight SikaProof Bentonite rolls and accessories in dry and stable conditions to protect the product from premature hydration, deterioration or damage. Enclosed indoor storage such as a shipping container or a warehouse environment is preferred if SikaProof Bentonite Sheet is to be stored for long periods.
  • Keep rolls of SikaProof Bentonite Sheet in original plastic wrappers for ease of product identification & greater weather protection.
  • For safety, move and lift 1.1m x 10m rolls using two (2) persons per roll with lifting bar through the core of the roll and move and lift 2.2m x 10m rolls using approved mechanical lifting devices.

Application

Application steps

SUBSTRATE QUALITY

SURFACE PREPARATION

  • Base course substrates should be smooth, firm and unyielding (typically compacted to >90% Standard Proctor density). Sand shall not be used as the substrate as it does not provide adequate confining pressure.
  • SikaProof® Bentonite can be applied to damp concrete, however, concrete must be at least 48 hours old and must be free from standing water.
  • Masonry surfaces and concrete surfaces shall be smooth and even, with no abrupt deviations.
  • All damage, holes and cracks in masonry substrates must be repaired with the appropriate Sika MonoTop® repair system.
  • Masonry surfaces shall be ‘bagged’ with Sika MonoTop®-723 N or other appropriate cement‐based mortar or with SikaProof® Bentonite paste, as shall concrete surfaces with blow holes and minor imperfections
  • Mortar joints in masonry blockwork must be finished flush with the surface. If mortar joints have been pointed apply Sika MonoTop®-723 N levelling mortar or other appropriate cement‐based mortar to joints to make flush with surface.
  • Tie‐bolt holes must be filled with SikaGrout®-212, proprietary nonshrink grout.
  • Keep the site water table level at least 300mm below the level of the base or site concrete during the tanking process.
  • Complete any substrate remedial work prior to any SikaProof® Bentonite application or placement.
  • Substrate preparation shall be approved by the designer / engineer prior to installation of the waterproofing barrier.

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