--- product_id: 100711542 title: "MK Masterseal Plus K56506GRY Junction Box , Grey" brand: "masterseal plus" price: "926 kr" currency: NOK in_stock: true reviews_count: 3 url: https://www.desertcart.no/products/100711542-mk-masterseal-plus-k56506gry-junction-box-grey store_origin: NO region: Norway --- # 20-year guaranteed durability Robust recycled polycarbonate build IP66 dust & water protection MK Masterseal Plus K56506GRY Junction Box , Grey **Brand:** masterseal plus **Price:** 926 kr **Availability:** βœ… In Stock ## Summary > πŸ› οΈ Master the elements with MK Masterseal Plus β€” where durability meets precision. ## Quick Answers - **What is this?** MK Masterseal Plus K56506GRY Junction Box , Grey by masterseal plus - **How much does it cost?** 926 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/products/100711542-mk-masterseal-plus-k56506gry-junction-box-grey) ## Best For - masterseal plus enthusiasts ## Why This Product - Trusted masterseal plus brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Versatile Compatibility:** Seals securely around virtually any standard 13 amp plug, including molded plugs, enabling safe, reliable connections for all your outdoor and indoor appliances. - β€’ **Confidence Built to Last:** Backed by a 20-year guarantee and a broad product range, Masterseal Plus is the trusted choice for professionals demanding long-term reliability. - β€’ **Engineered for Endurance:** Crafted from tough recycled polycarbonate, this junction box resists UV fading, cracking, and extreme temperatures, maintaining flawless performance year-round. - β€’ **Patented Gel Seal Technology:** Innovative gel seal fixed to the mounting frame guarantees a foolproof, rapid installation with zero risk of sealing errors. - β€’ **Unrivaled Weatherproof Defense:** IP66 rating ensures total dust ingress protection and resistance to powerful water jets from any angleβ€”perfect for the harshest environments. ## Overview The MK Masterseal Plus K56506GRY Junction Box is a premium, IP66-rated enclosure designed for superior protection against dust and high-pressure water jets. Constructed from UV-resistant recycled polycarbonate, it withstands extreme temperatures without cracking or fading. Featuring a patented gel seal for quick, error-free installation and compatibility with standard 13 amp plugs, it’s ideal for demanding indoor and outdoor environments. Supported by a 20-year guarantee, this junction box offers professional-grade durability and peace of mind. ## Description MK Electric has always been at the forefront of technical innovation, especially when it comes to making weatherproof sockets and switches that are perfect for outdoor applications or damp and dusty environments. MK Electric is pleased to introduce its MK Masterseal Plus range, a range of IP-rated products that have been tested to levels well in excess of British Standards to ensure users are safeguarded in the harshest of environments MK Masterseal Plus has been specifically developed for use in both outdoor and indoor environments, and where wiring devices and accessories would be at risk from penetration by dust or water. With a rating of IP66, Masterseal Plus offers total protection against dust, and is protected against high-pressure jets of water from any direction. MK Masterseal Plus sockets can seal around virtually any standard 13 amp plug, including moulded plugs, allowing safe connection for any appliance. Masterseal Plus enclosures are made from recycled polycarbonate, one of the toughest thermoplastics available. With its robust construction and superb temperature tolerance, MK Masterseal Plus will not discolour, crack or fade in UV light and it will maintain its operation in extremes of heat and cold. An improved catch on the MK Masterseal Plus eases the opening and closing of the lid, whilst ensuring the integrity of the seal. The seal is fixed to the mounting frame, enabling rapid installation and removing the risk of error when placing a floating gasket. The Masterseal Plus range extends to more than 90 product variants and all are guaranteed for 20 years. MK Masterseal Plus is perfectly suited to a range of indoor and outdoor applications including in factories, laboratories, swimming pools, commercial kitchens, industrial units, warehouses, clean rooms and more. Review: Well Designed Unit - Good solid sturdy junction box with connection Ring supplied, well thought out design and very easy to connect up tidily and then easy to see visually if all are connected correctly, does the job well. Unlike previous reviewer, no NEON in the box (didn't expect one as it's not supposed to have one, and there is no window to fit it behind anyway) only point to note really, no cable glands supplied, so you'll have to work out what you need and purchase them separately, not really an issue as there are a lot of cheap options out there for 20mm holes (which is what these are when you push out the blanking plugs.) Good price too when supplied with desertcart free shipping Review: 5 star - well constructed and was as sold..10/10.been outside for a while is definately waterproof..no hestiations in recommending....have to use four words more ~) ## Features - IP66 rated - Robust construction and tempertaure tolerant - Patented gel seal - Wide range of products available - 20-year guarantee ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B004R9PPDM | | Best Sellers Rank | 496,913 in DIY & Tools (See Top 100 in DIY & Tools) 1,238 in Surface Mounted Junction Boxes 6,215 in Switches & Dimmers | | Brand Name | Masterseal Plus | | Colour | Grey | | Customer Reviews | 4.7 4.7 out of 5 stars (36) 4.7 out of 5 stars | | Eu Spare Part Availability Duration | 20 Years | | Finish Type | Textured | | Global Trade Identification Number | 05017490581808 | | Installation Type | Screw-In | | Item Weight | 0.22 Kilograms | | Manufacturer | MK | | Material | Thermoplastic | | Model Number | K56506GRY | | Number Of Items | 1 | | Part Number | K56506GRY | | Specification Met | IP66 | | Style | Protection | | Unit Count | 1.0 count | ## Product Details - **Material:** Thermoplastic - **Brand:** Masterseal Plus - **Colour:** Grey - **Style:** Protection - **Finish type:** Textured ## Images ![MK Masterseal Plus K56506GRY Junction Box , Grey - Image 1](https://m.media-amazon.com/images/I/71RYz63kzoL.jpg) ![MK Masterseal Plus K56506GRY Junction Box , Grey - Image 2](https://m.media-amazon.com/images/I/61Mt4KPZvlL.jpg) ## Questions & Answers **Q: Is this 30 amp** A: MK Masterseal Plus range, a range of IP66-rated weatherproof box for sockets Terminals and switches that are perfect for outdoor applications or damp and dusty environments. In their brochure it says 13 amp. I bought mine back in Feb 2012 wiring between house and shed for a supply. So i don`t think it is meant for 30 amps. Mine has been outside in all weathers and has not leaked yet. **Q: I am wanting black ones of these masterseal junction boxes part number k56506blk are you getting any of these ?.** A: I don't think that MK do a black version of this. I have only seen white and grey. **Q: does this have a rear entry knockout** A: Yes, however, unlike the side access holes, it is not a push out plug, but an actual old school knock-out section. BUT, it is NOT in the center of the box, it is offset, so if you were to use it, it will make using the supplied connection hub somewhat difficult, if not impossible. If you need to use a rear entry point, i would drill a 20mm hole in the center using a small hole saw ans connect a suitable cable access gland or conduit connector., that way the cable will access in the middle of the connection hub supplied and it will be much more user friendly. **Q: What size glands does it need** A: The knock-outs (one on each side) are M20, so they are for 20mm glands ! There is a knock-out on the back but it is off centre for some reason ! My installation was 'top' and 'side' and I had no problems. Hope that helps ! ## Customer Reviews ### ⭐⭐⭐⭐⭐ Well Designed Unit *by W***E on 22 May 2020* Good solid sturdy junction box with connection Ring supplied, well thought out design and very easy to connect up tidily and then easy to see visually if all are connected correctly, does the job well. Unlike previous reviewer, no NEON in the box (didn't expect one as it's not supposed to have one, and there is no window to fit it behind anyway) only point to note really, no cable glands supplied, so you'll have to work out what you need and purchase them separately, not really an issue as there are a lot of cheap options out there for 20mm holes (which is what these are when you push out the blanking plugs.) Good price too when supplied with Amazon free shipping ### ⭐⭐⭐⭐⭐ 5 star *by S***X on 16 May 2014* well constructed and was as sold..10/10.been outside for a while is definately waterproof..no hestiations in recommending....have to use four words more ~) ### ⭐⭐⭐⭐⭐ Usual high quality. *by P***Y on 13 August 2020* Used these many times, easy to wire and plenty of terminals . ## Frequently Bought Together - MK Masterseal Plus K56506GRY Junction Box , Grey - SWA Pack of 2 TCW20S PACK ALT-EN Gland Packs Complete with EarthingNuts. Suitable for outdoor use, SWA armoured cables. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.no/products/100711542-mk-masterseal-plus-k56506gry-junction-box-grey](https://www.desertcart.no/products/100711542-mk-masterseal-plus-k56506gry-junction-box-grey) --- *Product available on Desertcart Norway* *Store origin: NO* *Last updated: 2026-09-16*