Give your outdoor space a bold, contemporary finish with Optimum Sealed Onyx Block Pattern Concrete Sleepers. Featuring a rich, dark onyx colour, a textured block pattern and an Optimum Sealed finish, these concrete sleepers create a striking appearance for retaining walls and landscape designs.
The sealed finish adds an elegant sheen, while the block-style texture introduces depth and character. These sleepers complement dark fencing, modern architecture and contrasting garden greenery, making them an attractive option for residential and commercial landscaping projects across Brisbane, the Gold Coast and surrounding areas.
Key Features & Benefits
- Dark Onyx Colour: Creates a bold, sophisticated look in outdoor spaces.
- Optimum Sealed Finish: Adds an attractive sheen to the sleeper surface.
- Textured Block Pattern: Provides a masonry-inspired appearance with added visual depth.
- Concrete Construction: Suitable for approved retaining wall systems and landscaping applications.
- Three Length Options: Available in 1.6m, 2.0m and 2.4m lengths.
- Contemporary Design: Complements modern fencing, architectural features and landscaped gardens.
Landscaping Applications
Optimum Sealed Onyx Block Pattern Concrete Sleepers can enhance a variety of landscaping and outdoor construction projects.
- Retaining Walls: Create a bold, textured finish using a suitably designed retaining wall system.
- Boundary Landscaping: Pair with dark fencing for a coordinated, modern appearance.
- Raised Garden Beds: Add contrast and definition to planting areas.
- Sloping Landscapes: Help define ground levels where suitable for the site and retaining wall design.
- Residential Gardens: Complement modern homes, paving and green garden features.
- Commercial Landscaping: Provide a refined finish for suitable outdoor construction projects.
Available Sizes & Specifications
Optimum Sealed Onyx Block Pattern Concrete Sleepers are available in the following sizes:
- 1.6m: 1591mm L × 200mm H × 75mm W — approximately 60kg
- 2.0m: 1991mm L × 200mm H × 75mm W — approximately 70kg
- 2.4m: 2391mm L × 200mm H × 75mm W — approximately 80kg
Colour: Onyx / dark charcoal
Finish: Optimum Sealed with a textured block pattern
Material: Concrete
Confirm the required dimensions and suitability for your retaining wall design before ordering.
Installation & Care
Before installation, assess the site conditions, soil type, drainage requirements and intended retaining wall height. Use a retaining wall system with posts, footings and structural components appropriate for the project.
Concrete sleepers are heavy and require suitable lifting and handling equipment. Follow the supplier’s recommendations for handling and maintaining the sealed finish. For retaining walls involving significant height, surcharge loads, sloping sites or complex soil conditions, consult a qualified professional and follow applicable local requirements.
Why Choose Optimum Sealed Onyx Block Pattern Concrete Sleepers?
Optimum Sealed Onyx Block Pattern Concrete Sleepers combine a dark, sophisticated colour with a textured design and an elegant sealed finish. They offer a distinctive option for landscaping projects that call for a contemporary look with added surface character.
Whether you’re upgrading a residential garden, creating a retaining wall or completing a larger landscaping project, these sleepers provide a refined finish for outdoor spaces across Brisbane, the Gold Coast and surrounding regions.






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