Product Data Sheet Show all documents
Sika® BentoShield® Max LM

Sika® BentoShield® Max LM

Polymer modified bentonite waterproofing system.

Sika® BentoShield® Max LM is a self healing waterproofing membrane that is resistant to contaminated soils, forming an automatic mechanical bond to freshly poured concrete. Consisting of two polypropylene geotextiles, a woven fabric and non-woven fabric, enclosing prehydrated homogeneous layer of granular sodium bentonite at a minimum weight of 5000g/m². The two geotextiles are interlocked by a needle-punching process forcing fibres from the non-woven layer through and beyond the woven layer. This process contains and confines the polymer modified bentonite granules and forms a physical link between the geotextiles. A flexible polyethylene layer is integrally bonded to the non-woven geotextile.

  • Qualified waterproofing tanking membrane in accordance with BS8102:2022
  • Water tightness of the laps tested to BS EN 1928.
  • Designed to offer protection in areas subject to changing geological conditions such as flood plains, areas of soil settlement and brown field constructions.
  • Application ensures performance stability in high water table environments and constructions which are subject to future alterations in water levels.
  • An effective barrier against ground water in saline environments.
  • Easy to install, no primers required.
  • Easy to install, no protection boards required.
  • Can be applied in temperatures below 0°C
  • Will self heal when subjected to a head of water1.
  • Can be applied during conditions of high humidity.
  • Major constructions benefit from speed of application.
  • 0.3mm PE backing gives effective Radon barrier in accordance with BRE211.

1 Damaged area size less than 2mm. Self-healing varies subject to moisture, confinement and compression levels.
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Product Data Sheet Show all documents

Usage

  • Damp proofing, water proofing, tanking membrane for horizontally and vertical applications where buildings are expected to be subject to hydrostatic water pressure.
  • Below ground reinforced concrete structures
  • Effective against diaphragm wall constructions.
  • Direct application onto ground retaining concrete piling when placed within the piling - concrete interface
  • Direct application within steel sheet piling – concrete interface
  • Can be placed within the formwork.
  • Below structural reinforced concrete slabs.

Advantages

  • Qualified waterproofing tanking membrane in accordance with BS8102:2022
  • Water tightness of the laps tested to BS EN 1928.
  • Designed to offer protection in areas subject to changing geological conditions such as flood plains, areas of soil settlement and brown field constructions.
  • Application ensures performance stability in high water table environments and constructions which are subject to future alterations in water levels.
  • An effective barrier against ground water in saline environments.
  • Easy to install, no primers required.
  • Easy to install, no protection boards required.
  • Can be applied in temperatures below 0°C
  • Will self heal when subjected to a head of water1.
  • Can be applied during conditions of high humidity.
  • Major constructions benefit from speed of application.
  • 0.3mm PE backing gives effective Radon barrier in accordance with BRE211.

1 Damaged area size less than 2mm. Self-healing varies subject to moisture, confinement and compression levels.

Packaging

1.1m x 5m rolls

2.5m x 25m rolls (available on request)

(tolerance ±3%)

Colour

Black woven / White non-woven geotextiles, yellow polyethylene laminate

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • Conforms to the requirements of BS EN 1928 (24h/60 KPa) Watertightness to liquid water
  • Declaration of performance CPR-0554-MAXLM-25-07
  • CE Certificate No. 1301 – CPD - 0554
  • EN 13491:2007 - Geosynthetic barriers “Characteristics required for use as a fluid barrier in the construction of tunnels and underground structures
  • EN 13492:2004 - Geosynthetic barriers “Characteristics required for use in the construction of liquid waste disposal sites, transfer stations or secondary containment”
  • EN 13493:2007 - Geosynthetic barriers “Characteristics required for use in the construction of solid waste storage and disposal sites”
  • EN 13361:2004 - Geosynthetic barriers “Characteristics required for use as a fluid barrier in the construction of reservoirs and dams”
  • EN 13362:2006 - Geosynthetic barriers “Characteristics required for use in the construction of Canals
  • BBA Certificate 16/5342 for waterproofing structures
Product Information

Chemical Base

Polymer modified natural sodium bentonite and polypropylene geotextiles

Shelf Life

2 years from date of production

Storage Conditions

Store properly in dry conditions in undamaged and unopened original sealed packaging.

Effective Thickness

Thickness

6,5mm

PE Thickness

0.3mm

Mass per unit area

> 5000 g/m2

(ASTM 5993)
System information

System Structure

  • Sika® BentoShield® Max LM is installed with the woven geotextile in contact with the concrete surface to be waterproofed.
  • No priming is required as the system mechanically bonds to poured concrete thus forming an integral seal which prevents water migration.
  • By lapping joints with a minimum overlap of 100 mm between adjoining edges and 100 mm between roll ends a continuous waterproof barrier is created. Laps should be staggered by 300 mm to avoid a build up of product in one location.
  • All vertical lap joints are sealed with Sika BentoShield SS50 Bonding Tape. Horizontal lap joints can be sealed with Sika BentoShield SS50 Bonding Tape, a 5 mm x 50 mm fillet of Sika BentoShield Granules or a similar fillet of Sika BentoShield Paste, and closed with staples or fixing system.
Technical Information

Resistance to Static Puncture

> 1850N

(EN ISO 12236)

Tensile Strength

> 10 kN/m

(ASTM D 6768)

Adhesion in peel

> 2,5 kN/m

(ASTM D 903)

Water Tightness

70m

(ASTM D 5385)

Application

Application steps

APPLICATION INSTRUCTIONS

APPLICATION CONDITIONS / LIMITATIONS
 

  • Sika® BentoShield® Max LM should only be applied after the successful preparation of the substrate is completed.
  • The membrane is designed to work under confinement.
  • When placing Sika® BentoShield® Max LM inside the formwork, the formwork must be removable & not the stay in-situ variety.
  • Sika® BentoShield® Max LM products are not designed to be installed over ice or in standing water. Should the ground water contain strong acids, alkalies, or has a conductivity of 2,500 μmhos/cm or greater, water samples should be tested for compatibility.
  • Rolls may compress slightly during storage. Membrane can be shaken once unrolled to return to their full length.
     

COMPATIBILITY
 

Sika® BentoShield® Max LM may be combined with other Sika products.

Important: Always conduct trials before combining products in specific mixes and contact the Sika Technical Service Department for information and advice about any specific combinations.

Material is unaffected by temperature.

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