--- product_id: 3605817 title: "53351 Professional UV Leak Detection Kit – 12V High-Intensity Light – Detects A/C, Coolant, Fuel, Oil, ATF Leaks – Includes Universal Dyes, Glasses, R134a & R12 Compatible" brand: "mastercool" price: "€ 157.37" currency: EUR in_stock: true reviews_count: 12 category: "Mastercool" url: https://www.desertcart.hr/products/3605817-53351-professional-uv-leak-detection-kit-12v-high-intensity-light store_origin: HR region: Croatia --- # 50W 12V high-intensity UV light Universal fluorescent dyes for oil & coolant R134a & R12 compatible with essential accessories 53351 Professional UV Leak Detection Kit – 12V High-Intensity Light – Detects A/C, Coolant, Fuel, Oil, ATF Leaks – Includes Universal Dyes, Glasses, R134a & R12 Compatible **Brand:** mastercool **Price:** € 157.37 **Availability:** ✅ In Stock ## Summary > 🔍 Illuminate leaks like a pro — don’t let hidden problems slow you down! ## Quick Answers - **What is this?** 53351 Professional UV Leak Detection Kit – 12V High-Intensity Light – Detects A/C, Coolant, Fuel, Oil, ATF Leaks – Includes Universal Dyes, Glasses, R134a & R12 Compatible by mastercool - **How much does it cost?** € 157.37 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/3605817-53351-professional-uv-leak-detection-kit-12v-high-intensity-light) ## Best For - mastercool enthusiasts ## Why This Product - Trusted mastercool brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Complete Pro Kit:** Comes with dye remover, safety glasses, and service labels—everything a technician needs on the go. - • **Rugged Portability:** Durable molded carry case keeps your tools organized and ready for any job, anywhere. - • **Universal Dye System:** Includes oil and coolant fluorescent dyes for versatile diagnostics across multiple vehicle systems. - • **Legacy & Modern Compatibility:** Works seamlessly with R134a and R12 refrigerants, covering both new and older vehicles. - • **Pinpoint Precision Leak Detection:** 50-watt UV light reveals hidden leaks in seconds, even in the toughest spots. ## Overview The Mastercool 53351 Professional UV Leak Detection Kit features a powerful 50W 12V UV light and universal fluorescent dyes to quickly identify leaks in A/C, coolant, oil, ATF, and fuel systems. Compatible with both R134a and R12 refrigerants, this all-in-one kit includes essential accessories like dye remover, safety glasses, and service labels, all housed in a rugged carry case designed for professional technicians and mobile use. ## Description Mastercool 53351 Professional UV Leak Detection Kit The Mastercool 53351 kit provides a complete UV leak detection solution for automotive and HVAC technicians. Designed to locate leaks in A/C, coolant, fuel, oil, and ATF systems with precision and ease. Kit Contents: - High-Intensity Mini UV Light (12V / 50W) - 1 oz Universal Fluorescent Dye Cartridge (10 Applications) - Refillable Oil/Dye Injector Hose Assembly - R134a Coupler and R12 Adapter - 1 oz Engine Coolant Dye - 4 oz Dye Remover - UV-Enhancing Safety Glasses - 25 Service Information Labels - Durable Molded Carrying Case Key Benefits: ✔️ Detects refrigerant, coolant, oil, fuel, and ATF leaks ✔️ Compact and powerful 50W-equivalent UV light for accurate leak detection ✔️ Refillable dye injector compatible with R134a and R12 systems ✔️ Includes universal oil dye and dedicated coolant dye ✔️ Packaged in a rugged case for easy transport and field use Important Use Notes: - Always wear safety glasses and gloves when injecting dye - Purge air from the injector hose prior to first use - Do not operate the UV light without proper eye protection - Avoid touching the UV light lens during use – surface becomes hot Built for professionals who demand accuracy, portability, and performance — backed by Mastercool’s U.S.-based support team. Review: WARNING PLEASE USE CAUTION - This is a great set and the price is below $60 bucks. It is pretty straight forward and has usage label for each dye. If the dye happens to be same color as your coolant just go to local auto shop and buy alternate color. Do not put anything in your engine gas coolant or engine oil that is not recommended for the car. If you are not mechanically inclined leave it to the professionals. That said if you are buying this it is because you want to do it yourself. The kit works and you will be able to service cars a few times the best part of this kit is the UV light that connects right onto the battery. This means you never have to buy batteries and the cord is very long so you can see all over the engine. The kit comes with everything you see in the video and the major set back is to not have a case. The more expensive kits come with carrying case but that will run you extra $20 bucks or so. How to check for leaks 1. Your first step is visual inspection oil will flow down and backwards because of gravity. so start from the back of the car and move forward. 2. Look for highest point oil is coming from and that should be source of your leak 3. Clean the area of oil or coolant or what ever fluid is leaking with break parts cleaner and a paper towel or wd40 both work well for cleaning grease and oils. 4. Turn engine on again to see where fresh oil or coolant or leak is coming from this will help locate the exact spot for the leak. 5. If you still did not find leak manually then time for some uv dye. pour dye into fluid you are testing. (again you should clean area FIRST before putting in dye to get better results. be careful when injecting dye into pressurized systems so make sure to weak gloves and goggles. 6. Start the car after putting in dye and let the dye circulate through the system after 2-3 minutes turn engine off and connect your uv light and put on glasses and follow steps 1-2.and you should find your leak 7. Typical places for leaks are connection points hoses being cracked or broken, bolts being loose or seals being work, or maybe no leak at all just a sloppy mechanic who poured oil all over the place or didn't tighten oil filter. hope this advice helps if so please click the helpful link and let me know. and good luck with your leak job. this test works for any year make or model. Review: Works well, good product - I used this on my Vintage Air system in my 1974 Dodge Charger. The kit I used was universal so I made the lines and I was able to find a very small leak in one the lines. It was because of a poor job by me when I crimped an end on. This made the job much easier than expected! ## Features - ✔️ All-In-One Leak Detection Kit – Quickly identify refrigerant, coolant, oil, ATF, and fuel leaks across automotive and HVAC systems with a complete, ready-to-use kit. - ✔️ High-Intensity 12V UV Light – 50-watt inspection light delivers bright, focused UV illumination for pinpoint leak detection even in hard-to-see areas. - ✔️ Universal Dye Coverage – Includes 1 oz cartridge of fluorescent dye for oil-based systems (10 applications) and 1 oz engine coolant dye for cooling system diagnostics. - ✔️ Industry-Compatible Design – Comes with R134a hose and coupler, plus an R12 adapter for legacy system support. Works with most passenger vehicles and service equipment. - ✔️ Includes Essential Accessories – Features 4 oz dye remover, 25 service labels for recordkeeping, and UV-enhancing safety glasses for technician protection. - ✔️ Rugged Carry Case for Portability – Durable molded case keeps tools organized and ready for mobile technicians or shop use. - ✔️ Mastercool Reliability & Support – Built for professional-grade performance with U.S.-based customer service from our US headquarters. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000IHJXHG | | Best Sellers Rank | #74,670 in Automotive ( See Top 100 in Automotive ) #29 in Air Conditioning Leak Detection Tools | | Brand | Mastercool | | Customer Reviews | 4.5 4.5 out of 5 stars (435) | | Date First Available | March 1, 2008 | | Is Discontinued By Manufacturer | No | | Item Weight | 2.2 pounds | | Item model number | 53351-B | | Manufacturer | Mastercool | | Manufacturer Part Number | 53351-B | | Model | Professional UV Leak Detector Kit | | Product Dimensions | 9.75 x 6.75 x 3.25 inches | ## Images ![53351 Professional UV Leak Detection Kit – 12V High-Intensity Light – Detects A/C, Coolant, Fuel, Oil, ATF Leaks – Includes Universal Dyes, Glasses, R134a & R12 Compatible - Image 1](https://m.media-amazon.com/images/I/81jGvjvV13L.jpg) ## Questions & Answers **Q: How long should i keep the engine running for UV dye to show up? And do i have to rev it or just idle it?** A: Since I used the fluorescent dye to detect leaks from the power-steering system I had to drive my car around for approx 15 mins to actually see where it was leaking from. At idle I couldn't see any leaks. After the drive the leak was pretty obvious and the UV light picked it up right away. **Q: are glasses included?** A: Yes. They are an amber/yellow color **Q: does it come with dye for a/c** A: Yes it comes with a/c dye **Q: Can the kit be used to identify transmission leaks?** A: transmission leak should b readily identifiable by the red tint already in the fluid to b sure either water blast or at least hose off under hood all oils and then get on fairly clean surface to see if red oil shows up keep in mind u could have more than one leak and some people will put trans fluid in power steering complicating matters ## Customer Reviews ### ⭐⭐⭐⭐⭐ WARNING PLEASE USE CAUTION *by E***R on October 2, 2014* This is a great set and the price is below $60 bucks. It is pretty straight forward and has usage label for each dye. If the dye happens to be same color as your coolant just go to local auto shop and buy alternate color. Do not put anything in your engine gas coolant or engine oil that is not recommended for the car. If you are not mechanically inclined leave it to the professionals. That said if you are buying this it is because you want to do it yourself. The kit works and you will be able to service cars a few times the best part of this kit is the UV light that connects right onto the battery. This means you never have to buy batteries and the cord is very long so you can see all over the engine. The kit comes with everything you see in the video and the major set back is to not have a case. The more expensive kits come with carrying case but that will run you extra $20 bucks or so. How to check for leaks 1. Your first step is visual inspection oil will flow down and backwards because of gravity. so start from the back of the car and move forward. 2. Look for highest point oil is coming from and that should be source of your leak 3. Clean the area of oil or coolant or what ever fluid is leaking with break parts cleaner and a paper towel or wd40 both work well for cleaning grease and oils. 4. Turn engine on again to see where fresh oil or coolant or leak is coming from this will help locate the exact spot for the leak. 5. If you still did not find leak manually then time for some uv dye. pour dye into fluid you are testing. (again you should clean area FIRST before putting in dye to get better results. be careful when injecting dye into pressurized systems so make sure to weak gloves and goggles. 6. Start the car after putting in dye and let the dye circulate through the system after 2-3 minutes turn engine off and connect your uv light and put on glasses and follow steps 1-2.and you should find your leak 7. Typical places for leaks are connection points hoses being cracked or broken, bolts being loose or seals being work, or maybe no leak at all just a sloppy mechanic who poured oil all over the place or didn't tighten oil filter. hope this advice helps if so please click the helpful link and let me know. and good luck with your leak job. this test works for any year make or model. ### ⭐⭐⭐⭐⭐ Works well, good product *by C***B on October 8, 2024* I used this on my Vintage Air system in my 1974 Dodge Charger. The kit I used was universal so I made the lines and I was able to find a very small leak in one the lines. It was because of a poor job by me when I crimped an end on. This made the job much easier than expected! ### ⭐⭐⭐⭐ Works Well *by D***. on August 3, 2025* Good quality light, dye injector didn't work at all, the connector does not fit R-134a refrigerant systems so don't count on that but the light on the other hand works very well when it stays together. The lens started falling out during use about the 6 or 7th time using it. I believe the rubber that retains the lens does not like heat very well and loses its strength to hold in the glass lens. If you can figure out that problem the light works great. ## Frequently Bought Together - Mastercool 53351 Professional UV Leak Detection Kit – 12V High-Intensity Light – Detects A/C, Coolant, Fuel, Oil, ATF Leaks – Includes Universal Dyes, Glasses, R134a & R12 Compatible - Tracer Products TP34000601 UV Fluorescent Leak Detection Dye - Set of 6 - UV Fluid Leak Detection Dye, 8 Oz --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/3605817-53351-professional-uv-leak-detection-kit-12v-high-intensity-light](https://www.desertcart.hr/products/3605817-53351-professional-uv-leak-detection-kit-12v-high-intensity-light) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-04-25*