MAGGIE magnetic safety rebar mushroom caps with NdFeB snap-fit magnet and 360° retroreflective band, available in two sizes covering 8mm to 33mm rebar diameter, supplied in boxes of 100.
- Magnetic snap-fit: one-handed placement on steel rebar, stays secure in wind and vibration
- Encapsulated NdFeB magnet: strong retention with corrosion protection, no push-fit loosening
- 360° retroreflective band: visible in low-light and night conditions on site
- High-visibility green body: instant hazard identification across the site
- Two sizes: 8mm to 25mm (CF130004) and 22mm to 33mm (CF130005)
- Reusable and recyclable: UV-stabilised PP body, removable and reused across multiple sites
- Pack size: 100 caps per box
MAGGIE Magnetic Safety Rebar Mushroom Caps - Pack of 100
MAGGIE magnetic safety rebar mushroom caps with NdFeB snap-fit magnet and 360° retroreflective band, available in two sizes covering 8mm to 33mm rebar diameter, supplied in boxes of 100.
- Magnetic snap-fit: one-handed placement on steel rebar, stays secure in wind and vibration
- Encapsulated NdFeB magnet: strong retention with corrosion protection, no push-fit loosening
- 360° retroreflective band: visible in low-light and night conditions on site
- High-visibility green body: instant hazard identification across the site
- Two sizes: 8mm to 25mm (CF130004) and 22mm to 33mm (CF130005)
- Reusable and recyclable: UV-stabilised PP body, removable and reused across multiple sites
- Pack size: 100 caps per box
MAGGIE magnetic safety rebar mushroom cap
Standard push-fit rebar mushroom caps have one fundamental weakness: they rely on friction to stay on the bar. Wind, vibration, and site movement work against that friction constantly, and a cap that has blown off or been knocked loose is a cap that is no longer protecting anyone. The MAGGIE Magnetic Safety Rebar Mushroom Cap fixes this with an encapsulated NdFeB magnet and a flexible hybrid grip collar that locks onto steel rebar rather than simply sitting on it. The result is a cap that stays where it is placed, even on exposed sites in high winds, on vibrating formwork, and on bars with varying diameters across the 8mm to 33mm range.
New to the UK market, the MAGGIE cap is the only rebar safety cap combining magnetic snap-fit retention, a 360° retroreflective band for low-light visibility, and a UV-stabilised recyclable PP body. It covers the full range from wire and small studding at 8mm through to large heavy-duty rebar at 33mm across two size variants, and is supplied in boxes of 100 for site-scale deployment.
Why choose the MAGGIE magnetic safety rebar mushroom cap
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Magnetic snap-fit system: The encapsulated NdFeB magnet creates an immediate, strong connection to the steel rebar on contact. One-handed placement means caps can be fitted rapidly without stopping to press and check each cap is seated. On high-bar-count pours this is a meaningful time saving compared to push-fit alternatives.
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Wind and vibration resistant: Push-fit caps rely on the internal ribs gripping the bar under friction. On exposed groundworks, starter bar arrays, and vibrating formwork, that friction is regularly overcome. The magnetic snap-fit holds the cap independently of friction, keeping it in place through the conditions that displace standard caps.
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Encapsulated NdFeB magnet: Neodymium Iron Boron is the strongest commercially available permanent magnet material. The magnet is fully encapsulated in the cap body, protecting it from corrosion and preventing any contact with concrete or site chemicals that would degrade an exposed magnet over time.
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360° retroreflective band: The reflective band around the cap body returns light from any direction in low-light conditions. On sites operating early morning, late evening, or under artificial lighting, the MAGGIE cap is visible when a standard coloured plastic cap is not. No competitor rebar cap in the UK market offers this specification.
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Flexible hybrid grip collar: The internal grip collar flexes to stabilise on varying bar diameters within each size range. This means a single size covers the full diameter spread rather than requiring a different cap for each bar size in the range.
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UV-stabilised, impact-modified PP body: The polypropylene body is specified for outdoor service life across multiple site deployments. UV stabilisation prevents the brittleness and cracking that degrades standard plastic rebar caps after extended outdoor exposure. Impact modification maintains cap integrity if struck during site operations.
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Reusable and recyclable: Caps can be removed with one hand and redeployed on a new bar or a new site. At end of life, the PP body is recyclable, supporting site waste reduction and sustainability reporting requirements.
What's included
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100 x MAGGIE magnetic safety rebar mushroom caps in your selected size
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Size CF130004: covers 8mm to 25mm rebar diameter
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Size CF130005: covers 22mm to 33mm rebar diameter
Specifications
| Specification | Detail |
|---|---|
| Product Name | MAGGIE Magnetic Safety Rebar Mushroom Caps - Pack of 100 |
| Product Code | CF13000 (parent) |
| Brand | Maggie |
| Retention System | Magnetic Snap-Fit with Encapsulated NdFeB Magnet |
| Internal Grip | Flexible Hybrid Grip Collar |
| Body Material | UV-Stabilised, Impact-Modified Polypropylene (PP) |
| Colour | High-Visibility Green |
| Visibility Feature | 360° Retroreflective Band |
| Size CF130004 | 8mm to 25mm Rebar Diameter |
| Size CF130005 | 22mm to 33mm Rebar Diameter |
| Pack Size | 100 Caps per Box |
| Reusable | Yes - removable and redeployable across multiple sites |
| Recyclable | Yes - PP body recyclable at end of life |
| Applications | Groundworks, Civil Engineering, Concrete Frameworks, Utility Installations, Temporary Works, Starter Bar Protection |
Available sizes
| Product Code | Rebar Diameter Range | Typical Application | Pack Size |
|---|---|---|---|
| CF130004 | 8mm to 25mm | Wire, small studding, standard rebar up to 25mm | 100 |
| CF130005 | 22mm to 33mm | Heavy-duty rebar and large bar up to 33mm | 100 |
Who is this for?
Site managers, groundworks contractors, civil engineers, health and safety officers, and construction procurement teams who need rebar protection that stays in place regardless of wind, vibration, or site movement. Suited to any project where exposed steel rebar presents an impalement or contact injury risk and where standard push-fit caps have proven unreliable.
Typical applications
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Groundworks and foundation rebar protection on open, wind-exposed sites
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Starter bar arrays on concrete pours where bars remain exposed between pours
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Civil engineering and infrastructure projects with large rebar arrays requiring rapid cap deployment
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Utility and service installation projects with exposed bar in trenches and shafts
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Temporary works protection on formwork and falsework rebar
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Night working and low-light environments where the retroreflective band improves hazard visibility
How to use
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Select the correct size: CF130004 for 8mm to 25mm rebar, CF130005 for 22mm to 33mm rebar.
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Hold the cap above the exposed rebar end and bring it into contact. The NdFeB magnet snaps onto the steel bar on contact.
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The flexible hybrid grip collar stabilises the cap on the bar diameter. No pressing, twisting, or tool use is required.
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Confirm the cap is secure by applying light lateral pressure. The magnetic retention should hold the cap firmly in place.
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To remove: grip the cap body and pull directly upward away from the bar. The cap releases cleanly for redeployment on a new bar or a new site.
Safety
Rebar caps are a legal requirement on UK construction sites under the Health and Safety at Work Act 1974 and Construction (Design and Management) Regulations 2015. Every exposed rebar end must be capped to eliminate impalement and contact injury risks. The MAGGIE cap must only be used on ferrous steel rebar: it will not magnetically retain on non-ferrous, stainless, or FRP rebar. Inspect caps regularly on long-term exposures and replace any cap showing cracking, deformation, or visible magnet damage.
Maintenance
Inspect caps before each redeployment. Discard any cap with a cracked body, deformed grip collar, or visible damage to the encapsulated magnet housing. The PP body is UV-stabilised for extended outdoor service but will degrade under prolonged exposure to strong solvents or concentrated acids. Clean caps with water before storage. Store in the original box to prevent damage between deployments.
Frequently Asked Questions
Q: What is an NdFeB magnet and why is it used in the MAGGIE cap?
A: NdFeB stands for neodymium-iron-boron, the strongest commercially available permanent magnet material. The encapsulated NdFeB magnet in the MAGGIE cap provides a retention force significantly greater than friction-based push-fit caps, maintaining its hold against wind load, vibration from nearby plant, and incidental contact. The encapsulation protects the magnet from corrosion in the wet and contaminated conditions typical of UK construction sites.
Q: Why do standard push-fit rebar caps keep coming off and how does the MAGGIE cap solve this?
A: Push-fit caps rely entirely on friction between the internal ribs and the rebar surface. Wind load, vibration, and contact from plant or passing operatives all apply lateral or upward force that overcomes this friction, particularly on sites where bar surfaces have concrete slurry or release agent residue. The MAGGIE cap uses magnetic retention as the primary holding force, which is independent of surface condition and resists displacement from all directions.
Q: What does the 360° retroreflective band do?
A: The retroreflective band reflects light back towards its source from any horizontal angle, making the capped rebar visible to plant operators and site personnel when illuminated by headlights, torches, or site lighting in low-light conditions. This is particularly relevant on sites with early-morning starts, late finishes, or overnight security patrols where exposed rebar is a hazard in darkness.
Q: Which size variant do I need?
A: CF130004 covers 8mm to 25mm bar diameter, which suits wire, studding, and standard structural rebar up to T25. CF130005 covers 22mm to 33mm for heavy structural bar from T25 upwards. The overlap between 22mm and 25mm means either variant works on T25 bar: if your site uses predominantly larger bar, CF130005 gives a better fit on the heavier sizes.
Q: Can the caps be reused on multiple projects?
A: Yes. The MAGGIE cap is designed for reuse. Remove by pulling upward to overcome the magnetic retention, clean with water to remove concrete contamination, inspect the body and magnet housing for damage, and redeploy. The recyclable PP body means any caps that have reached the end of their service life can be disposed of through standard plastic recycling rather than general site waste.
Q: Will the magnetic caps work on all types of rebar?
A: The magnetic retention system works only on ferrous (steel) rebar. Non-ferrous bars such as aluminium, brass, or copper rod, and non-metallic reinforcement such as fibreglass or GFRP bars, are not attracted by the magnet and will not retain the cap magnetically. For non-ferrous applications, a standard push-fit cap is the correct product.
Q: Are rebar caps a legal requirement on UK construction sites?
A: Under UK health and safety legislation, specifically the Construction (Design and Management) Regulations 2015 and the general duty of care under the Health and Safety at Work Act 1974, principal contractors must manage and mitigate foreseeable site hazards, including impalement and laceration risks from exposed rebar. Capping exposed rebar is the standard method of compliance and is expected by HSE inspectors on any site where rebar is present.
Q: Where can I order the MAGGIE magnetic rebar caps and what are the delivery options?
A: Both size variants of the MAGGIE magnetic safety rebar mushroom cap are available at cmt.co.uk in boxes of 100. CMT Group operates a fleet of over 100 vehicles covering 90% of the UK mainland with next working day delivery on orders placed by 7pm online. Same-day VIP delivery is available UK-wide for urgent site requirements, dispatched within 30 minutes. Trade accounts and EDGE portal ordering are available for procurement teams.
