- Allows a much stronger mix, leading to a smoother crack-resistant finish
- Saves money
- 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
Black Knight Wizard Fibre is an easy to use cement additive that makes your pond smoother, stronger and crack-resistant.
A 1kg pack of Wizard Fibre can cover approximately 8 – 18sqm at 5mm thick.
Wizard is a very fine glass fibre designed specifically for mortar or concrete reinforcement. 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.
1 – 2% fibres added to the total mix by weight.
3 parts of building sand to 1 part cement.
We recommend the use of a mortar plasticiser in the mix (available at builders’ merchants) because it makes application easier.
A 1kg pack of Wizard Fibre can cover 8 – 18sqm at 5mm thick.
Typical mix proportions:
5 litres cement, 15 litres sand, 225 – 450g fibres.
The addition of fibre to the mix will improve workability up to about 90g per litre of cement and will decrease above this figure. Maximum crack resistance and strength is achieved at about this level. We suggest you experiment on a test area before you begin the job.
Allow extra time in the mixer for fibre dispersal. We suggest a minimum of 80 drum revolutions.
Do not attempt to render in hot, direct sunshine. The mix will dry out rather than cure, and it will spoil. Do not apply in frosty conditions.