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Tasir® -WM Pre-applied waterproofing membrane conforming to the requirements of BS EN 13967:2012 and BS 8102:2009. Freshly poured concrete mechanically bonds to the Tasir®-WM, remaining in place even if settlement of substrate occurs Uses Waterproofing and gasproofing membrane for concrete......Send InquiryChat Now
Tasir® -WM Pre-applied waterproofing membrane conforming to the requirements of BS EN 13967:2012 and BS 8102:2009. Freshly poured concrete mechanically bonds to the Tasir®-WM, remaining in place even if settlement of substrate occurs
Waterproofing and gasproofing membrane for concrete basements, liftpits, carparks and other water excluding structures. Tasir®-WM can be used to achieve waterproofing to Grades 1,2 and 3 as defined in BS 8102: 2009.
● Unique mesh system allowing fresh concrete to mechanically bond
● Smart antitracking design prevents water tracking between membrane and concrete
● Simple and quick to install - no protection film to remove
● Basement waterproofing protection to grades 1, 2 and 3 as defined in BS 8102:2009
● Methane and CO2 protection as defined in BRE Report 212
● Radon protection as defined in BRE Report 211
● BBA certification
● Protects concrete from attack from chemicals, hydrocarbons and aggressive ground salts in contaminated sites
● Simple application - requires no primer or protection, and blinding concrete may be eliminated
● Inert product - no risk of a reaction with ponded water prior to concrete being poured
● Membrane composition gives excellent flexibility for detailing, combined with high durability and toughness for site trafficking.
Tasir®-WM is a unique patented waterproof membrane system comprising a cell mesh bonded to a blended polyethylene / polypropylene membrane which allows poured concrete to interlock, forming a tenacious mechanical bond.
Tasir®-WM provides water, water vapour and gas protection to water excluding structures and protects concrete from aggressive ground salts, chemicals and hydrocarbons.
Tasir®-WM is supplied with a self-adhesive selvedge along one side of the roll and a comprehensive range of auxillary products.
Independently certified performance, BBA certificate ( No. 03/4042).
BS EN 13967:2012 - Flexible sheets for waterproofing- Plastic and rubber damp proof sheets including plastic and rubber basement tanking sheet. Type A and Type T.
British Standard 8102:2009 - Code of Practice for ‘Protection Of StructuresAgainst Water From the Ground'Classes 1, 2 and 3.
Green Label Singapore Labelling Scheme - approved as “environmentally preferred coating”
Taizheng Construction Material Co.,Ltd
Type A and Type T
Resistance to impact
Conforms with 5.17
Resistance to static load
Elongation at break
L >140%, T >120%
L >9N/mm2, T >7N/mm2
Water vapour resistance after ageing
Resistance to tearing
Shear resistance of joints
>220N lap, >150N butt
Water vapour properties
Sd = 400m
The waterproof tanking membrane shall be Tasir®-WM, consisting of a blended polyethylene / polypropylene membrane incorporating a cell mesh, enabling freshly poured concrete to mechanically bond to the membrane. The membrane shall be supplied with one self-adhesive selvedge and comply with British Standard 8102 2009 - Code of practice for “Protection of Structures Against Water from the Ground” to provide basement waterproofing protection to grades 1, 2 and 3. The product shall comply with the requirements of BS EN 13967:2012, Type A and Type T, “Flexible sheets for waterproofing- Plastic and rubber damp proof sheets including plastic and rubber basement tanking.” The product shall have a current British Board of Agrément Certificate.
Watertightness to liquid water
EN 1928 Method A
No evidence of water penetration
Resistance to static loading
EN 12730 method B
Tensile properties (membrane sheet only):
Tensile strength/ elongation at
break/ elongation at peak load
>18 MPa / >800% / >800%
Tensile properties (composite sheet plus mesh):
ASTM C1305 modified
up to 5mm (100 cycles)
Durability of watertightness against ageing
EN 1296 / EN 1928
Resistance to impact Puncture resistance
EN 12691 Method A ASTM E154-08
Resistance to tear (nail shank)
720 N (longitudinal)
Reaction to fire
EN ISO 11925-2
>220 N (lap)
Water vapour transmission
Water vapour resistance factor u
Resistance to alkali
EN 1847 / EN 1928
Watertight at 2kPa at 60kPa
4 – 5mm overall
<75 mm per 10 metre length
Free from visible defects
BS ISO 15105-1:2007
Rilem Report 12
<5.12 E -13m2/sec/Pa
Clarification of property values: The typical properties given above are derived from laboratory testing. Results derived from field applied samples may vary.
Horizontal application - the membrane must be applied to smooth, prepared substrate. Concrete blinding is preferred but a well compacted granular fill is acceptable for a level subbase. The substrate shall be free from loose aggregate or other sharp protrusions. Standing water must be removed to prevent contamination of overlaps and subsequent compromise of waterproof properties.
Vertical application - the membrane is applied to temporary or permanent formwork or adjoining structures.
Tasir®-WM must not be applied directly onto contiguous or secant piled walls. A plywood sacrificial shutter or spray concrete finish should be used prior to application.
Cut the membrane to a convenient length for installation. Carefully align the membrane and roll it out with the ribbed surface uppermost. Lay adjacent sheets accurately so they overlap the previous sheet 80mm along the adhesive selvedge. When laying adjacent full rolls there should be a stagger of half a roll length to avoid a build up of end joints in one area.
End joints and cut edges - Butt join the Tasir®-WM sheets onto Tasir®-WM Detail Strip. The top surface of the join can be further sealed with a 40mm wide strip of Tasir Polyurea WCS GG (extending a minimum of 20mm either side of the formed joint), refer to separate datasheet. Or a 100mm wide strip of Tasir®-LM reinforced with Tasir®-LM Mesh.
Horizontal to vertical joints - Lap Tasir®-WM onto Tasir®-L section and overseal with a 40mm wide strip of Tasir Polyurea WCS GG (extending a minimum of 20mm either side) or a 40 mm fillet of Tasir®-LM which may be reinforced with Tasir®-LM mesh.
All overlaps and joints should be firmly rolled to ensure complete adhesion between layers.
Remove all release tapes with a short sharp pulling action, especially in hot weather.
If cold or damp conditions prevail the selvedge adhesive, Tasir®-WM Detail Strip and Total Tape may be tackified by gently warming.
Removal of formwork
Where the membrane has been applied toremovable shuttering it is recommended that a minimum concrete compressive strength of 10 N/mm2 is reached before the formwork is stripped.
Penetrations e.g., pipe entries through Tasir®-WM, require special attention to detail. Tasir®-PTH units used in conjunction with Tasir®-PTT and sealer are recommended. Refer to Tasir for more information on details.
Backfilling material must be free from sharp objects and debris that could damage the Tasir®-WM. It should not contain house bricks, blocks or boulders larger than 50 mm.
Tasir®-WM is suitable for use in many contaminated ground applications eg hydrocarbons, salts etc. Consult local Tasir office for specific advice.
Store in original unopened packaging, in cool dry conditions, away from sunlight, in a flat position.
Proofex “L“ section should be stored vertically as supplied, in cool dry conditions. Do not distort or crush the coil.
For cold weather working below +5oC, Tasir®-WM can normally be applied if the following additional measures are taken; apply heat using a hot air blower to all adhesive tapes, store all materials in heated conditions and mix Tasir®-LM in heated conditions. In some cases a heated tented working area should be used especially whereTasir®- LM and Tasir® self-adhesive membranes are used. Normal precautions for winter working should be adopted when placing concrete. For high temperature/humidity climates please contact your local Tasir Office for project specific method statements. During installation the membrane should not be left exposed for more than 6 to 8 weeks.
Health and safety
Tasir®-WM weighs approximately 60kg and should be lifted by a minimum of three site operatives.
For further information refer to appropriate Product Safety Data Sheets available at www.groutmaterial.com
Tasir and WM are trademarks of Zhejiang Taizheng Construction Material Co.,Ltd
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