Anti-Crack Wizard Fibre

Product code: wf1564
Out of stock
27.50 22.36 (ex. VAT)
Anti-crack additive to prevent hairline cracks in concrete ponds. Prevents future leaks.
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Add strength and prevent concrete from cracking by adding wizard fibre to the last layer of concrete render.

Wizard is a very fine glass fibre designed specifically for mortar or concrete reinforcement ponds and pools.  It has been in use for decades in specialised architectural and construction projects where very high performance is required to withstand sustained stresses or harsh conditions and where long service is important. It prevents cracks forming in concrete ponds thereby preventing leaks.

Why a concrete pond?
  • Concrete will be smooth, liners may have wrinkles
  • Less vulnerable to damage from roots
  • Will not puncture
  • Resists damage by animals
  • Long life expectancy
concrete pond construction

Why use Wizard Fibre?
Cracks in concrete ponds can cause leaks, use anti crack fiber to prevent this.
Allows a much stronger mix, leading to a smoother crack-resistant finish that is safer for the fish
Increases workability, making it easier to apply.
Far stronger, more durable and easier to use than polypropylene alternatives
Dramatically reduces the likelihood of leaks developing
High zirconia content offers superb alkali resistance

Coverage: 1 kilogram pack can cover 8 to 18 square meters at 5mm thick.

Tips: Allow extra time in mixer for fibers to disperse.Do not add water proffer to final anti crack fiber render so as to allow sealant to soak into concrete. Render coat should be allowed to chemically cure before sealing. For concrete to chemically cure, it typically takes 21 to 30 days .
For fishponds it is recommended that no water proofer is used in the mix and that G4 pond sealant is applied once the render coat has set and cured dry.

How to apply anti-crack fiber

First apply a thin scratch coat of sand and cement (4:1 mix). It is beneficial to include fibres in this coat but not essential. If the concrete is dry and dusty it should be swept and dampened just before application.

Leave the scratch coat to set for at least two days.

Prepare only sufficient render mix that can be used within approximately 45 minutes at a time.

Dampen the scratch coat with a sprayer before applying the render mix. Failure to do this will severely weaken the render and may prevent good adhesion.

Work systematically away from your starting point so that the leading edge has not set before applying the next strip. If you do need to join on a flat surface then it is important to taper off the leading edge before you finish so that you get a good key when you continue.
The render should be applied at 5mm (min) to 8mm (max) thickness. Work on an area that you can reach to trowel off again in a few minutes.

In warm conditions it will take only a few minutes for the material to begin setting and at this point it will need to be trowelled off again to give a final finish. Spraying a fine mist of water on the surface will greatly assist this process. In cool weather it could be an hour or more before final trowelling is possible
anti crack fibers for strong pond construction

Brand black knight
Product Code wf1564
Weight 1kg