10 Best External Extension Lead Waterproof 40m in The UK

Last updated on 07/06/2025
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Best Choice
1
9.8
Exceptional
SLx Outdoor Extension Lead, 50m, 4 Socket Extension Reel, Heavy Duty Extension Cable, Thermal Cut Out, Extension Lead for Garden lawn mower Office, 13A Fused UK Plug
SLx
SLx Outdoor Extension Lead, 50m, 4 Socket Extension Reel, Heavy Duty Extension Cable, Thermal Cut Out, Extension Lead for Garden lawn mower Office, 13A Fused UK Plug
Free Shipping
Why We Love It
  • Practical for professional or household use.
  • Integrated tangle-free cable management.
  • Enhanced safety with bright coloring.
Main Highlights
  • ✔️ MULTI PURPOSE POWER: A must-have for professionals, DIY enthusiasts or general household use - this robust 4 socket outdoor extension lead from SLx is ideal for providing safe and practical power sockets outside or indoors. Whether you need to use a lawnmower or power tools, with this overload protected cable reel you can be sure to have the power when you need it.
  • ✔️ STAY TANGLE FREE: With its attached winding handle and robust design, this power cable reel keeps your lead ready for action. The extra-long 50m cable reel can be fully unwound in seconds, and when you are finished it can be simply wound back without tangling with a built in cable guide to assist the reel process. The durable metal frame features a convenient carry handle for easier transportation, while the wide base offers stability while stood up.
  • ✔️ BRIGHT CABLE FOR SAFETY: The 50m extension lead has been thoughtfully coloured bright yellow to make it more visible in use - whether on a building site or in a back garden, being more perceptible will reduce its trip hazard and risk of accidental cutting, and improve its overall safety.
  • ✔️ BUILT IN PROTECTION: Ideal for commercial and domestic use, this 13A rated extension reel features a heavy duty in built thermal overload protection switch for peace of mind - protecting you and your equipment from harm in the event of an overload. The plug is BSI approved and 13A fused mains plug attached to high quality copper tri-core corrosion resistant cable
  • ✔️ A BRAND YOU CAN TRUST: Established over 30 years ago, SLx are a proudly British company - designing and manufacturing high quality products used by trade professionals. We offer a full 12 month warranty together with full time friendly local support staff should you need any help.
9.8
Exceptional
Amazon Logo
Best Value
2
9.8
Exceptional
SLx Outdoor Extension Lead Waterproof, 20m, 2 Socket Extension Reel, Heavy Duty Extension Cable, Thermal Cut Out, IP54 Rated, Double Socket, UK Outdoor Plug, Extension Lead for Christmas Lights Garden
SLx
SLx Outdoor Extension Lead Waterproof, 20m, 2 Socket Extension Reel, Heavy Duty Extension Cable, Thermal Cut Out, IP54 Rated, Double Socket, UK Outdoor Plug, Extension Lead for Christmas Lights Garden
Free Shipping
Why We Love It
  • Weatherproof for outdoor use.
  • Tangle-free, easy transport.
  • Safety features provided.
Main Highlights
  • ✔️ ALL WEATHER OUTDOOR POWER: A must-have for all seasons and conditions, this outdoor weatherproof extension lead from SLx is ideal for providing safe and practical power sockets outside or indoors. Whether you need to use a lawnmower or garden power tools, with this protected cable reel you can be sure to have the power when you need it.
  • ✔️ STAY TANGLE FREE: With its attached winding handle and robust design, this power cable reel keeps your lead ready for action. The extra long 20m extension lead can be fully unwound in seconds, and when you are finished it can be simply wound back without tangling. The durable casing features a convenient carry handle for easier transportation, while the wide base offers stability while stood up.
  • ✔️ IP54 RATED SPLASHPROOF: The 2 fully covered splashproof sockets are IP54 rated weatherproof sealed and provide a safe and convenient temporary outdoor power solution so you can work in the garden and safely use power tools, lawnmowers and appliances even in damp conditions without worrying about water splashes should it
  • ✔️ BUILT IN PROTECTION: Ideal for commercial and domestic use, this 13A rated extension reel features a heavy duty in built thermal overload protection switch for peace of mind - protecting you and your equipment from harm in the event of an overload. The plug is BSI approved and 13A fused mains plug attached to high quality copper tri-core corrosion resistant cable.
  • ✔️ A BRAND YOU CAN TRUST: Established over 30 years ago, SLx are a proudly British company - designing and manufacturing high quality products used by trade professionals. We offer a full 12 month warranty together with full time friendly local support staff should you need any help.
9.8
Exceptional
Amazon Logo
3
9.7
Exceptional
Save 17%
SLx Outdoor Extension Lead, 40m, 4 Socket Extension Reel, Heavy Duty Extension Cable, Thermal Cut Out, Extension Lead for Garden Lawn Mower Office, 13A Fused UK Plug
SLx
SLx Outdoor Extension Lead, 40m, 4 Socket Extension Reel, Heavy Duty Extension Cable, Thermal Cut Out, Extension Lead for Garden Lawn Mower Office, 13A Fused UK Plug
17% OffFree Shipping
Why We Love It
  • Versatile and robust power source.
  • Tangle-free, easy handle design.
  • Bright and safety-conscious build.
Main Highlights
  • ✔️ MULTI PURPOSE POWER: A must-have for professionals, DIY enthusiasts or general household use - this robust 4 socket outdoor extension lead from SLx Trade is ideal for providing safe and practical power sockets outside or indoors. Whether you need to use a lawnmower or power tools, with this overload protected cable reel you can be sure to have the power when you need it.
  • ✔️ STAY TANGLE FREE: With its attached winding handle and robust design, this power reel keeps your lead ready for action. The extra-long 40m outdoor extension lead can be fully unwound in seconds, and when you are finished it can be simply wound back without tangling with a built in cable guide to assist the reel process. The durable metal frame features a convenient carry handle for easier transportation, while the wide base offers stability while stood up.
  • ✔️ BRIGHT CABLE FOR SAFETY: The 40m extension lead has been thoughtfully coloured bright yellow to make it more visible in use - whether on a building site or in a back garden, being more perceptible will reduce its trip hazard and risk of accidental cutting, and improve its overall safety.
  • ✔️ BUILT IN PROTECTION: Ideal for commercial and domestic use, this 13A rated extension cable reel features a heavy duty in built thermal overload protection switch for peace of mind - protecting you and your equipment from harm in the event of an overload. The plug is BSI approved and 13A fused mains plug attached to high quality copper tri-core corrosion resistant cable
  • ✔️ A BRAND YOU CAN TRUST: Established over 30 years ago, SLx are a proudly British company - designing and manufacturing high quality products used by trade professionals. We offer a full 12 month warranty together with full time friendly local support staff should you need any help.
9.7
Exceptional
Save 17%
Amazon Logo
4
9.7
Exceptional
SLx Outdoor Extension Lead Waterproof, 30m, 2 Socket Extension Reel, Heavy Duty Extension Cable, Thermal Cut Out, IP54 Rated, Double Socket, UK Outdoor Plug, Extension Lead for Christmas Lights Garden
SLx
SLx Outdoor Extension Lead Waterproof, 30m, 2 Socket Extension Reel, Heavy Duty Extension Cable, Thermal Cut Out, IP54 Rated, Double Socket, UK Outdoor Plug, Extension Lead for Christmas Lights Garden
Free Shipping
Why We Love It
  • Weatherproof for outdoor use.
  • Tangle-free long reach.
  • Safety ensured with IP54.
Main Highlights
  • ✔️ ALL WEATHER OUTDOOR POWER: A must-have for all seasons and conditions, this outdoor weatherproof extension lead from SLx is ideal for providing safe and practical power sockets outside or indoors. Whether you need to use a lawnmower or garden power tools, with this protected outdoor cable reel you can be sure to have the power when you need it.
  • ✔️ STAY TANGLE FREE: With its attached winding handle and robust design, this outdoor cable reel keeps your lead ready for action. The extra long 30m extension lead can be fully unwound in seconds, and when you are finished it can be simply wound back without tangling. The durable casing features a convenient carry handle for easier transportation, while the wide base offers stability while stood up
  • ✔️ IP54 RATED SPLASHPROOF: The 2 fully covered splashproof sockets are IP54 rated weatherproof sealed and provide a safe and convenient temporary outdoor power solution so you can work in the garden and safely use power tools, lawnmowers and appliances even in damp conditions without worrying about water splashes should it
  • ✔️ BUILT IN PROTECTION: Ideal for commercial and domestic use, this 13A rated outdoor extension lead features a heavy duty in built thermal overload protection switch for peace of mind - protecting you and your equipment from harm in the event of an overload. The plug is BSI approved and 13A fused mains plug attached to high quality copper tri-core corrosion resistant cable
  • ✔️ A BRAND YOU CAN TRUST: Established over 30 years ago, SLx are a proudly British company - designing and manufacturing high quality products used by trade professionals. We offer a full 12 month warranty together with full time friendly local support staff should you need any help.
9.7
Exceptional
Amazon Logo
5
9.7
Exceptional
Save 6%
Desiretech - 4 Socket Extension Lead - 50m Portable Cable Reel - Thermal Cut Out, Ergonomic Handle, Green/Black - Heavy Duty Extension Cord for Indoor Use (50 Metre)
Desiretech
Desiretech - 4 Socket Extension Lead - 50m Portable Cable Reel - Thermal Cut Out, Ergonomic Handle, Green/Black - Heavy Duty Extension Cord for Indoor Use (50 Metre)
6% Off
Why We Love It
  • Top-tier professional performance and innovation.
  • Ergonomic and efficient winding handle.
  • Safety thermal cut-out feature.
Main Highlights
  • Professional Performance and Innovation: Desiretech's portable cable reel extension lead delivers top-tier performance and innovative design, making it the professional’s choice for portable power solutions. It includes four shuttered sockets for versatile use.
  • Ergonomic Pull-Out Drum Wind Handle: The integrated, pull-out drum wind handle allows for quick and efficient winding of the high-visibility cable. The handle design ensures increased speed and control, aided by an integrated cable guide. Dimensions of the product are 22.5 x 8.3 x 28 cm (L x W x H).
  • Safety Thermal Cut-Out with LED Power Indicator: This extension lead features a safety thermal cut-out to prevent overheating when the cable is fully reeled. The LED power indicator provides a clear visual cue of the power status and allows for easy resetting if a cut-out occurs.
  • Bright Green Cable for Enhanced Safety: The bright green colour of the cable enhances its visibility, reducing trip hazards and the risk of accidental cutting. This thoughtful design improves overall safety, whether you're using it on a construction site or in your garden. The cable reel is made from durable PP material, ensuring long-lasting performance.
  • High Power Capacity and Safety Certifications: With a power capacity of up to 3120W, this extension lead meets CE and UKCA safety standards. It also features child-resistant sockets for additional safety.
9.7
Exceptional
Save 6%
Amazon Logo
6
9.6
Superb
Save 13%
STATUS 4 Socket Cable Reel, 50m, Green, 13 Amp, Thermal Cut Out, Heavy Duty, Outdoor Extension Lead, Ideal for Garden, Workshop, DIY, Power Tools (S50M13ACRX1)
Status
STATUS 4 Socket Cable Reel, 50m, Green, 13 Amp, Thermal Cut Out, Heavy Duty, Outdoor Extension Lead, Ideal for Garden, Workshop, DIY, Power Tools (S50M13ACRX1)
13% Off
Why We Love It
  • Optimizes convenience with multiple sockets.
  • Impressive extended reach with long cable.
  • Ensures safety preventing overheating.
Main Highlights
  • MAXIMUM REACH WITH 50M POWER RANGE STATUS 4 socket cable reel features a generous 50 metre green extension lead, ideal for large outdoor spaces, construction zones, and commercial sites. Designed for users needing reliable long-distance power.
  • FOUR SOCKETS FOR MULTI-TOOL CONNECTIVITY Fitted with four 13 amp sockets, providing the capacity to power multiple appliances or tools at the same time. Suitable for garden machinery, power tools, lighting, and DIY equipment.
  • SAFETY CONTROLLED WITH THERMAL CUT OUT Built-in thermal cut out automatically disconnects power during overheating or overload, offering critical protection to users and devices. Essential for safe operation over extended periods.
  • DURABLE DESIGN FOR DEMANDING ENVIRONMENTS Constructed with a toughened reel housing and reinforced frame, built to handle regular use in outdoor conditions. A strong choice for tradespeople, landscapers, and serious DIY tasks.
  • PEACE OF MIND WITH 1 YEAR WARRANTY Backed by a 1 year manufacturer warranty for protection against defects in materials or workmanship. The STATUS 50m cable reel provides secure, long-range electrical access with outstanding reliability.
9.6
Superb
Save 13%
Amazon Logo
7
9.5
Superb
SLx Outdoor Extension Lead Waterproof 25m 2 Socket Extension Reel Heavy Duty Extension Cable Thermal Cut Out IP54 Rated, Double Socket UK Outdoor Plug Extension Lead for Christmas Lights Garden
SLx
SLx Outdoor Extension Lead Waterproof 25m 2 Socket Extension Reel Heavy Duty Extension Cable Thermal Cut Out IP54 Rated, Double Socket UK Outdoor Plug Extension Lead for Christmas Lights Garden
Free Shipping
Why We Love It
  • All weather outdoor power source.
  • Tangle-free and easy to use.
  • IP54 rated for splashproof safety.
Main Highlights
  • ✔️ ALL WEATHER OUTDOOR POWER: A must-have for all seasons and conditions, this outdoor weatherproof extension lead from SLx is ideal for providing safe and practical power sockets outside or indoors. Whether you need to use a lawnmower or garden power tools, with this protected cable reel you can be sure to have the power when you need it.
  • ✔️ STAY TANGLE FREE: With its attached winding handle and robust design, this power cable reel keeps your lead ready for action. The extra long 25m extension lead can be fully unwound in seconds, and when you are finished it can be simply wound back without tangling. The durable casing features a convenient carry handle for easier transportation, while the wide base offers stability while stood up.
  • ✔️ IP54 RATED SPLASHPROOF: The 2 fully covered splashproof sockets are IP54 rated weatherproof sealed and provide a safe and convenient temporary outdoor power solution so you can work in the garden and safely use power tools, lawnmowers and appliances even in damp conditions without worrying about water splashes should it
  • ✔️ BUILT IN PROTECTION: Ideal for commercial and domestic use, this 13A rated extension reel features a heavy duty in built thermal overload protection switch for peace of mind - protecting you and your equipment from harm in the event of an overload. The plug is BSI approved and 13A fused mains plug attached to high quality copper tri-core corrosion resistant cable.
  • ✔️ A BRAND YOU CAN TRUST: Established over 30 years ago, SLx are a proudly British company - designing and manufacturing high quality products used by trade professionals. We offer a full 12 month warranty together with full time friendly local support staff should you need any help.
9.5
Superb
Amazon Logo
8
9.4
Superb
Daewoo Extension Reel, 4 Way Socket with 50 Metre Cable, Heavy Duty with Resettable Safety Cut Out, Open Frame, Black and Green
Daewoo
Daewoo Extension Reel, 4 Way Socket with 50 Metre Cable, Heavy Duty with Resettable Safety Cut Out, Open Frame, Black and Green
Free Shipping
Why We Love It
  • Ensures absolute safety.
  • Connect four devices simultaneously.
  • Neat cable storage guaranteed.
Main Highlights
  • SAFETY CUTOUT – Equipped with a reset button, this extension reel will automatically shut off if it becomes too hot during use, ensuring absolute safety
  • 4 WAY SOCKET – Compatible with UK plugs, allowing you to connect up to four devices for versatile use in your home, office, or garden
  • 50 METRE CABLE – Offering a longer reach from your mains socket when you need the extra length both inside and outside. Avoid using outside in wet conditions
  • WINDING HANDLE – Use the winding handle to neatly store the cable when not in use, preventing tripping hazards
  • COMPACT DESIGN – Features a portable, lightweight design, making it easy to move around the house or office. Its slim and compact design also facilitates convenient storage when not in use
9.4
Superb
Amazon Logo
9
9.3
Superb
3 Phase Extension Leads - 32A 5 Pin - (40 Metre) - IP67-415v - 1-40 Metres - Waterproof HO7RN-F Heavy Duty Rubber Cable - Custom Length - Pat Tested And Supplied W/Certificate (40 Metre)
Generic
3 Phase Extension Leads - 32A 5 Pin - (40 Metre) - IP67-415v - 1-40 Metres - Waterproof HO7RN-F Heavy Duty Rubber Cable - Custom Length - Pat Tested And Supplied W/Certificate (40 Metre)
Why We Love It
  • Fully waterproof for outdoor use.
  • Quality CE connectors ensure consistency.
  • Industrial-grade performance for durability.
Main Highlights
  • IP67 Rating: Fully waterproof and dustproof, making this extension lead ideal for outdoor, wet, and harsh environments.
  • CE connectors are used to maintain quality and consistency
  • Made With High-Quality H07RN-F Rubber Cable
  • PAT Tested and Certified: We prioritize safety by providing fully tested and certified products, giving you peace of mind during every use.
  • Ferruled, Built to Last: Our extension leads are crafted for industrial-grade performance, ensuring they can handle tough environments and demanding applications.
9.3
Superb
Amazon Logo
10
9.2
Superb
masterplug HDCC5013/4BL-MP - Masterplug HDCC5013/4BL 50m 13A 4-Socket Open Cable Reel
Masterplug
masterplug HDCC5013/4BL-MP - Masterplug HDCC5013/4BL 50m 13A 4-Socket Open Cable Reel
Why We Love It
  • Strong zinc plated steel frame.
  • Thermal cut-out protection included.
  • 50 metre long cord.
Main Highlights
  • Open Cable reel design with strong zinc plated steel frame
  • Thermal cut-out protection
  • Manufactured to BSEN61242
  • Cord length: 50 metre
  • Number of sockets: 4
9.2
Superb
Amazon Logo

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We scanned 345 products

We reviewed these offers relevant to the External Extension Lead Waterproof 40m within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like SLx, Desiretech, Status, Daewoo, Generic, Masterplug, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.
For the best External Extension Lead Waterproof 40m in the market, we considered we took a deep dive into 1726 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that: