Sika BentoShield MAX LM is a polymer modified bentonite waterproofing system. Mechanically bonded, contaminate resistant, self healing membrane for basement and below ground structures.

Sika BentoShield MAX LM is a self healing waterproofing membrane that’s resistant to contaminated soils, forming an automatic mechanical bond to freshly poured concrete it virtually eliminates the possibility of water movement between the membrane & structure. Approximately 6.5 mm thick, 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.

Uses

• 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.

Features & Benefits

• Qualified waterproofing tanking membrane in accordance with BS8102: 2009
• 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.

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.