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• Features & Benefits
• Application Notes
• Limitations

Features & Benefits

• Comprising a cell mesh bonded to a blended polyethylene / polypropylene membrane which allows poured concrete to interlock, forming a tenacious mechanical bond
• Supplied with a self-adhesive selvedge along one side of the roll to provide sealed laps and a comprehensive range of auxiliary products to simplify the application process
• Bonding mechanism eliminates water migration pathways between the membrane and the concrete
• Unique mesh system bonds permanently to concrete, remaining in place even if settlement takes place
• Smart anti-tracking design prevents water tracking between membrane and concrete
• Simple and quick to install - no protection film to remove
• Provides Methane and Carbon Dioxide protection as defined in BRE Report 212 and independent assessment report
• Crack bridging up to 5mm (100 cycles) ASTM C1305 modified
• 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
• Root resistant
• Long life expectancy
• Where ground gas protection is required, Proofex Engage, in conjunction with Supercast Watertight Concrete, has been independently assessed as providing a protection score of 4.5 points, sufficient for all building types constructed in ground with a Characteristic Situation 3 hazard potential
• Please refer to the Product Data Sheet for full details of:
  
  • Specification Clause
  • Standards Compliance
  • Properties
  • Application Instructions
  • Storage
  • Health and Safety

Application Notes

• 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
• End joints and cut edges - Butt join the Proofex Engage sheets onto Proofex Engage Detail Strip.The top surface of the join can be further sealed with either a 100mm wide strip of Proofex LM reinforced with Proofex LM Mesh (extending 50mm either side of the formed joint), or a 60mm wide strip of Fosroc Polyurea WCS
• Horizontal to vertical joints - Lap Proofex Engage onto Proofex L Section and complete the seal with either a 40 mm concave fillet of Proofex LM reinforced with Proofex LM Mesh, or a 60mm wide strip of Fosroc Polyurea WCS Gun Grade. Gun apply and trowel quickly into the net mesh either side of joint
• Where the membrane has been applied to removable shuttering it is recommended that a minimum concrete compressive strength of 10N/mm² is reached before the formwork is stripped.
• Penetrations e.g. pipe entries through Proofex Engage, require special attention to detail. Proofex Top Hat units used in conjunction with Proofex Total Tape and Nitoseal MS60 are recommended. Alternatively a fillet of Proofex LM may be used
• Backfilling material must be free from sharp objects and debris that could damage the Proofex Engage. It should not contain house bricks, blocks or boulders larger than 50 mm. The use of a protection board is not normally required
• Suitable for use in many contaminated ground applications e.g. hydrocarbons, salts etc

Limitations

• For cold weather working below +5°C, Proofex Engage 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 Proofex LM in heated conditions
• In some cases a heated tented working area should be used especially where Proofex LM and Proofex self-adhesive membranes are used
• Normal precautions for winter working should be adopted when placing concrete
• For high temperature/humidity climates:
• During installation the membrane should not be left exposed for more than 6 to 8 weeks
• Please contact 0113 2455450 (option 2) or send a message to [email protected] for further project specific assistance, including when laying Proofex Engage directly onto closed cell insulation products
• Proofex Engage weighs approximately 58kg and should be lifted by a minimum of three site operatives