Fibrocem

Fibrocem is a material primarily designed for the production of durable exterior embellishments of high strength and fine definition. It has a rapid turnaround time, providing a cost and time-efficient system of casting. The finish is a pale Portland Stone which is alkali resistant.  Extremely easy to use, add water and mix, and it can be cast into most moulds.  A 25kg bag will give you approximately 9mm thick per square metre. 

The setting time of Fibrocem Precoat & Casting is dependent on mass and therefore thin layers and small mouldings will set quicker than larger mouldings. In very cold weather it is advisable to warm the gauging water. 

Available grades explained:

• Fibrocem Pre-Coat:  A fibre-free version for use as a preparation coat, to achieve a fine smooth surface.  The working time is about 20-30 minutes with a demould time of 3 hours. 
• Fibrocem Casting:  The primary casting material, with fibres. The working time is about 20-30 minutes with a demould time of 3 hours. 
• Fibrocem Normal Backing Render:  slower setting with demould of around 24 hours.

The manufacturer's recommended mix ratio is 4.75 litres per 25kg for Fibrocem Casting.

 This material is known to suffer from compaction lumps in unused bags.  This can be from being on the lower layers of a pallet, or from being unused for a while.  It's best to knock up the material in dry form, and/or crush up lumps by hand, before adding water. 

Fibrocem comes packed in a strong poly bag and has a 12mth shelf-life from the date of manufacture which is printed on the bag.