LW Combination Spray Gun

LW Combination Spray Gun: Power-Sprays’ lightweight, versatile spray gun for GRC and GRG. Features integrated fibre chopper, adjustable spray patterns, variable speed control, and easy maintenance for consistent, high-quality applications.

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The LW Combination Spray Gun by Power-Sprays is a lightweight, versatile spray gun engineered for efficient application of Glass Fibre Reinforced Concrete (GRC) and Glass Fibre Reinforced Gypsum (GRG). Designed as an alternative to the Concentric Spray Gun, the LW Combination Spray Gun excels in delivering precise, high-quality sprays with enhanced flexibility and ease of use. Featuring an integrated glass fibre chopper and slurry gun mounted on a single, adjustable bracket, this spray gun allows operators to fine-tune spray patterns to suit a variety of project requirements. Ideal for applications requiring fast-setting materials and the handling of slightly oversized particles, the LW Combination Spray Gun ensures consistent composite formation and minimal maintenance, making it an indispensable tool for modern GRC and GRG production facilities.

Key Features & Benefits

  1. Integrated Dual-Function Design
    • Combined Fibre Chopper & Slurry Gun: Streamlines the spraying process by merging fibre cutting and slurry application into one compact unit.
    • Adjustable Angle: Easily varies the spray pattern by adjusting the angle between the chopper and slurry gun, accommodating diverse project needs.
  2. Efficient Mixing & Application
    • Unique Helical Blade: Ensures precise cutting of glass fibre roving and uniform distribution within the slurry, enhancing the structural integrity of the composite.
    • Progressive Cavity Pump Compatibility: Delivers consistent slurry output, ideal for both hand-spray and automated GRC applications.
  3. User-Friendly Operation
    • Easy Dismantling & Cleaning: Designed for quick disassembly, especially beneficial when working with fast-setting materials or when cleaning is required after use.
    • Quick Release Couplings: Allow rapid removal of hoses for efficient cleaning and maintenance, reducing downtime between projects.
  4. Durable & Reliable Construction
    • IP55 Rated Motor: Provides hose-proof protection, ensuring longevity and reliable performance in demanding environments.
    • Heavy-Duty Components: Reinforced slurry hoses and hard-wearing eyelets prevent fibre snagging and withstand continuous use.
  5. Enhanced Control & Monitoring
    • Variable Speed Control: Adjusts motor speed to match specific spraying requirements, ensuring optimal fibre and slurry output.
    • LCD Screen Integration: Offers real-time monitoring of spray parameters, including speed, RPM, and mix time, for precise control and consistency.
  6. Safety & Flexibility
    • Boom Brake & Adjustable Gun Holder: Enhances control over the articulated boom and securely holds the spray gun when not in use, facilitating safe and efficient operation.
    • Closed-Loop System: Prevents dust from escaping, maintaining a cleaner and safer workspace.

Technical Specifications

SpecificationDetail
Weight3 kg
Dimensions (Overall)30 cm (W) × 20 cm (D) × 18 cm (H)
Air Consumption1200 L/m (40 CFM) at 7 bar (100 psi)
OutputFibre: 500–1000 g/min (Typical: 600 g/min)<br>Slurry: 10–20 kg/min (Typical: 12 kg/min)
Fibre Lengths Available41 mm, 31 mm, 25 mm, 12 mm, 6 mm (Standard: 31 mm cutter)
Motor2.2 kW, IP55-rated (hose proof)
Electrical Supply380/415 V, 3-phase, 50 Hz/60 Hz standard**
Air InletØ 3/4” (19 mm) hose tail (airline not included)
Pump TypeMulti-roller, low-pulse peristaltic pump with high abrasion resistance
HoseTransparent, reinforced slurry hose for easy cleaning
Additional FeaturesQuick release couplings, removable atomiser body and nozzle, support chain, tension adjuster, hard-wearing eyelets
*Max Output VarianceOutput varies based on mix fluidity and hose length
**Electrical VariantsUnits can be built to suit other 3-phase electricity supplies
*Typical outputs. Higher outputs are possible. Please discuss with Power-Sprays or your agent.**If electricity supply is from a generator, consult Power-Sprays for additional protection.

Optional Accessories

  1. Automated Dispenser Systems
    • WAAPS 3000 Liquid Dispensing System: Automates precise dispensing of water, admixtures, and polymers directly into the mixer.
    • Digital Water Meter: Automatically dispenses the required quantity of water with a pre-set and manual ‘jog’ function, ensuring accurate mix consistency.
  2. Automated/Semi-Automatic Weighing & Batching Systems
    • Dry Materials Weigh Vessel: Capacity for 100 kg sand and cement, integrated with automated screw conveyors for seamless material feeding.
  3. Platform Extensions & Access Stairs
    • Steel Hoop Mixing Vessel: Allows for full mix transportation and direct dispensing into moulds or spray stations.
    • Guard Rails: Enhance operator safety around elevated platforms.
  4. Fibre Choppers & Dispensers
    • Automated Fibre Integration: Ensures consistent fibre distribution in premix GRC applications, improving mix quality and structural integrity.
  5. Specialized Mounting Options
    • Floor Mounted Version: Suitable for setups where bucket trolleys are not required.
    • Tilting Drum Version: Mounted on a raised platform for direct pour into spray stations or moulds, reducing manual handling.

Why Choose the LW Combination Spray Gun from Power-Sprays?

  • Innovative Dual-Function Design: Combines fibre chopping and slurry spraying in one unit, enhancing operational efficiency and reducing equipment footprint.
  • Superior Mixing Technology: The unique helical blade ensures high-shear mixing for slurry and gentle fibre blending, resulting in uniform and robust GRC and GRG composites.
  • Enhanced Operational Control: Variable speed control and advanced calibration functions provide precise adjustments, ensuring consistent mix quality and spray patterns.
  • Ease of Maintenance: Quick release couplings, removable safety panels, and a support chain simplify cleaning and upkeep, minimizing downtime and maximizing productivity.
  • Durable Construction: Built to withstand the rigors of industrial environments with IP55 and IP66-rated components, ensuring long-term reliability and performance.
  • Versatile Application: Ideal for both GRC and GRG production, offering flexibility to handle a wide range of projects and material formulations.
The LW Combination Spray Gun by Power-Sprays is a state-of-the-art tool designed to meet the demanding needs of modern GRC and GRG production. Its integrated dual-function design, advanced mixing technology, and user-friendly features ensure consistent, high-quality results across a variety of applications. Whether you're producing architectural elements, decorative panels, or complex mouldings, the LW Combination Spray Gun delivers exceptional performance with minimal maintenance, making it an invaluable asset for any GRC or GRG manufacturing facility. Trust Power-Sprays to provide innovative, reliable solutions that enhance your production efficiency and product quality.
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Additional information

Weight3 kg
Dimensions20 × 30 × 18 cm

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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
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

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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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