MACt Defoamer

MACt Defoamer

Price range: $47.58 through $184.80 Inc GST

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MACt Defoamer is a premium defoaming additive formulated to remove unwanted air bubbles in GFRC (Glass Fibre Reinforced Concrete) mixes. By eliminating trapped air, MACt Defoamer enhances density, strength, and overall durability—making it an essential component for professionals seeking high-performance concrete products. Whether you’re aiming for greater resilience in challenging weather conditions or a more polished, defect-free appearance, MACt Defoamer delivers reliable results that extend the lifespan and quality of your concrete elements.

Key Features & Benefits

  1. Enhanced Density & Strength
    • Improved Load-Bearing Capacity: Removing air bubbles increases the concrete’s overall density, boosting its ability to handle heavy loads and endure harsh environments.
    • Higher Compressive Strength: Achieve stronger, more reliable GFRC products that meet demanding structural requirements.
  2. Reduced Permeability
    • Longer Lifespan: Fewer entrapped air bubbles lead to less porosity, mitigating moisture infiltration and subsequent cracking or spalling.
    • Improved Durability: Concrete becomes more water-resistant, preserving structural integrity and preventing early deterioration.
  3. Weathering Resistance
    • Withstands Freezing & Thawing: Defoamed mixes resist weather-induced damage, ensuring stable performance and fewer repairs.
    • Suitability for Harsh Environments: Ideal for outdoor applications in extreme climates, reducing long-term maintenance costs.
  4. Superior Workability
    • Streamlined Construction: Air-free mixes are easier to spread, pump, and finish, saving on labour and project timelines.
    • Efficient Placement: Consistent flow throughout the mix improves handling, reducing the likelihood of voids or uneven settling.
  5. Better Aesthetics
    • Smooth, Uniform Finish: Minimises honeycombing, voids, and surface blemishes, delivering a professional, polished appearance.
    • Ideal for Decorative Concrete: Perfect for GFRC applications where visual quality is a priority—facades, countertops, panels, and more.

Recommended Dosage & Usage

  • Dosage Range: 0.1–0.2% of the total water content in the mix.
  • Mixing Instructions:
    1. Add MACt Defoamer to the Water: Introduce the product directly into your batch water.
    2. Thoroughly Blend: Ensure consistent dispersion by mixing well before adding cementitious materials.
    3. Does Not Replace Water: Adjust your total water quantity as needed while respecting the defoamer dosage range.

Why Choose MACt Defoamer?

  • Greater Structural Integrity: Optimises density and strength for GFRC projects, large or small.
  • Reliable Weather Resistance: Helps concrete maintain its form and function under extreme temperature fluctuations.
  • Faster, Smoother Installation: Reduces air-induced obstacles, promoting efficient placement and finishing.
  • Enhanced Surface Quality: Produces visually appealing finishes with minimal defects or inconsistencies.
  • Cost-Effective: Minimises rework, repairs, and long-term maintenance expenses—saving time and resources.
MACt Defoamer offers a robust solution to the challenges posed by unwanted air bubbles in GFRC mixes. By improving density, reducing permeability, and enhancing resilience to weather and wear, this additive enables professionals to craft smoother, stronger concrete products. Whether your project demands architectural precision or heavy-duty performance, MACt Defoamer ensures a superior end result—one that stands out for its durability, aesthetics, and overall quality.

Additional information

Weight1.16 kg
Dimensions11 × 11 × 15 cm
Bag

1 Bag (20KG), 1KG, 4KG

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
If your return is accepted, we’ll send you instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted. Please note that if your country of residence is not Australia, shipping your goods may take longer than expected.
You can always contact us for any return questions at sales@mact.au

Expect prompt delivery and easy tracking — every order comes with updates along the way.

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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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