Boral Blue Circle Rapid Set No-Mix Concrete

Boral Blue Circle Rapid Set No-Mix Concrete is a proportioned blend of dry aggregate, graded sands, cement, and additive mixture suitable for post hole applications where lower than normal strength is acceptable. Designed for quick and easy installation, it requires no mixing in a wheelbarrow or mechanical mixer, as the additive reacts instantly with cement, providing a fast, effective, and fuss-free method for erecting posts or logs.

Key features include no-mixing requirement, rapid setting for immediate support, and ease of use by simply adding water directly in the hole. It is ideal for setting fence posts, logs, clothes hoists, letterboxes, or any support pole structure, but not recommended for use with aluminium substrates due to potential corrosion—consult the manufacturer first.

Available in convenient 20kg plastic-lined multi-walled paper sacks, it suits DIY and professional projects of various scales.

Technical specifications highlight its performance:

• Compressive Strength: 5 MPa at 1 day, 15 MPa at 7 days, 25 MPa at 28 days.
• Setting Time: Brace posts/logs for at least 15 minutes to allow the mix to set; keep moist for 7 days by light watering to maximize final strength.
• Yield: One 20kg bag yields approximately 0.011 cubic metres; 108 x 20kg bags yield 1 cubic metre.

For optimal results, follow recommended application instructions:

• Pour approximately 1.5 litres of clean water into the hole.
• Add half the bag contents and tamp with a steel rod to entrain water.
• Add the remaining half of the bag contents and an additional 0.5 litre of water, then tamp again and compact the surface.

Store in a cool, dry place off the ground and seal any unused material to prevent hydration from air and moisture—dispose of products older than 12 months. Safety precautions are essential: Avoid generating dust and inhalation with P2 masks in well-ventilated areas; use goggles, gloves, and barrier creams; wash off skin contact immediately to prevent alkali burns. Contains cement chemicals and trace hexavalent chromium; refer to the Safety Data Sheet for full details. Clean tools and equipment with water promptly after use.

Choose Boral Blue Circle Rapid Set No-Mix Concrete for quick, durable, and hassle-free post-setting solutions in your next project, backed by Australia’s trusted leader in construction materials.