Maclennan can supply water bars that will induce cracks where required by engineers, but unlike other induced construction joins – these are totally watertight.

Our crack inducing water bars are a coated metal water bar used for sealing construction joints. On one side is an adhesive, reactive polymer coating, which creates a permanent watertight seal with the surrounding concrete – creating an immediately working water bar through which water cannot pass even  when concrete has shrunk after curing.

Our crack inducing water bars are fast and easy to fit which will reduce expensive and time on site.  It is fitted in place to the reinforcement steel with special clips, so that once the concrete is poured, the water bar is fully embedded, completely preventing water passing through the joint.  Unlike more conventional water bars, which require a kicker upstand, our crack inducing water bar does not as it is not fixed to one of the concrete elements.  

It is certified to resist water pressure up to 7 bar and is resistant to all types of naturally occurring ground water types.  The MacLennan crack inducing water bars can be installed in any weather and temperature and are significantly more robust than conventional water bars. 

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MacLennan can advise on and supply a range of water bars including an injectable serviceable water bar.  The injectable water bar is installed in the same place as a hydrophilic strip and has a hydrophilic outer skin. 

In the event of a defect in concrete or even in the water bar installation, resin or mortar can be injected into the water bar to repair defects including cracks, honeycombing and failed joins.  The water bar can then be flushed through and remain serviceable if needed at a later date.

The following are some of the benefits of using our injectable swellable water bars:

• The hydrophillic outer casing swells up to 400 times its’ original size when it comes into contact with water.  Therefore completely sealing the joint.
• Will grout poorly compacted concrete
• Seal Leaking construction joints – after construction
• No limitations with choice of grouting material – all present materials can be injected.
• If flushed with water the system can be used repeatedly
• Can inject to 30m sections
• It is a simple solution to an often complex and costly problem – therefore saving time and money on site.

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