Charcoal Black Oxide (1kg)

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Charcoal Black Oxide (1kg)

Concrete Oxide Colours

A concrete pigment is an iron oxide pigment used in integral concrete colouring. They can come in either powder or liquid form. With integral colouring, there are a wide variety of concrete colour options available.

Advantages of Integral Colour

With integrally coloured concrete, the entire batch of concrete is coloured all the way through, similar to adding food colouring to cake icing. Integral colours are available in powdered, granular and liquid forms. All types are generally a blend of synthetic or natural iron-oxide pigments that are formulated to disperse evenly when mixed into fresh concrete, either at the ready-mix plant or at the job-site. The palette for integral pigments consists primarily of soft earth tones that integrate well with most landscapes and architectural elements.The chief advantage of integral pigments is that the colour extends throughout the entire concrete slab, so even if surface abrasion occurs, the colour will not wear away. The pigments in integral colouring admixtures also are chemically stable and won't fade over time from exposure to the weather or ultraviolet light.Another big advantage is convenience and labor savings. Because the integral colour is mixed into the concrete, you can simply place and finish the concrete as usual. There's no need to dust the colour onto the surface and float it in during finishing, as is the case with shake-on hardeners.

Where to use Concrete Pigments

Integral pigments can be added to just about any type of new concrete. Popular applications include exterior flatwork, floors, walls and countertops. Integral colour is ideal for achieving uniform tones with no variations. It also works well as a contrasting base shade for creating layers of colour. For example, stamped concrete contractors often start out with integrally coloured concrete and then enhance it with colour hardeners, stains and other surface-applied treatments. Indoors, integral colour is a good alternative to shake-on colour hardeners if mess and cleanup are concerns.
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Additional information

Weight1.1 kg
Dimensions30.5 × 20.5 × 3 cm
Weight

10KG, 1KG

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We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.
To start a return, you can contact us at sales@mact.au
Please note that returns will need to be sent to the following address:
Unit 3C, 919-925 Nudgee Road, Banyo, QLD, 4014, Australia
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You can always contact us for any return questions at sales@mact.au

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Got any question?

Browse through our frequently asked questions to find answers on everything from mould preparation and casting techniques to finishing and long-term maintenance.

Australia’s warm and, in many regions, coastal climate necessitates adjustments during manufacturing. High temperatures can accelerate hydration, so controlled curing environments—such as covering pieces with plastic to retain moisture—are essential. Additionally, lower water-to-cement ratios and carefully selected admixtures help mitigate rapid evaporation and ensure that GFRC develops its designed strength and durability.

Manufacturers address these challenges by:

  • Using precision mixing equipment to achieve a uniform blend and ensure proper fibre distribution.
  • Fine-tuning spray parameters (such as pressure, nozzle design and technique) to avoid voids, pinholes and surface defects.
  • Regular maintenance of equipment and continuous operator training.
  • Adjusting admixture dosages as required to optimise workability and adhesion.

Future trends include increased automation—such as robotic spraying and digital mould design—as well as a greater focus on sustainable practices (e.g. incorporating recycled materials and eco-friendly admixtures). Advances in fibre treatment technology and computer-aided manufacturing are enabling more complex, custom-designed panels. Ongoing research is continually refining mix designs and curing methods to better suit Australia’s diverse environmental conditions.

GFRC is a composite product that combines high‐quality cement, fine aggregates, polymers and alkali‐resistant glass fibres – all premixed to the correct proportions. Its high strength‐to‐weight ratio, durability and capacity for being cast in thin, custom shapes make it ideal for creating stylish and long-lasting benches and tables for both indoor and outdoor use.

GFRC manufacturers must comply with Australian building codes and standards relating to precast concrete, structural performance and safety. This means that production processes, material testing and installation methods are stringently monitored and documented. Close collaboration with local certifying bodies ensures that GFRC products meet all necessary performance and regulatory requirements.

With our premix product, all the ingredients are already proportioned for optimal strength and workability. This means you can focus on preparing your moulds and executing a neat cast rather than measuring raw materials.

Moulds for benches and tables can be constructed from high-density foam, melamine, or even silicone for more intricate designs. It is essential that the mould is smooth, watertight and well supported. Pre-treat the interior with a quality release agent to ensure that the cured GFRC can be removed cleanly.

Typical additional admixtures levels for a 20kg:

  • Water: 2.78L–3.0L
  • Plasticiser: 10g – 50g
  • Fibres HD: 50g-300g
  • Fibres Bundled: 400g-700g
  • Retarder: 5g-20g
  • Accelerator: 5g–20g
  • Defoamer: 1g-3g
  • Colour: up to 800g

*NOTE: All admixes will alter the way the mix behaves.

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