Refrigeration Technologies-RT100S Big Blu Micro Leak Detector 1 Qt

Refrigeration Technologies Big Blu (RT100S) is hands-down the best leak detector solution on the market. If you need to find a leak in HVAC, refrigeration lines, or anything pressurized, this is the stuff to get. The solution is thick, highly visible, and produces large, long-lasting blue bubbles that instantly pinpoint even the smallest leaks, making diagnosis incredibly fast and easy. What makes this product truly exceptional is its versatility. Beyond my professional use in HVAC work, I successfully used this exact bottle to find tiny, slow leaks in my car tires and even a bike tube! Just brush it on the valve stem and around the tire bead, and the bubbles pop up right where the air is escaping. It’s non-corrosive, safe on all materials, and the included applicator brush is perfect. It works flawlessly every time I use it. This product is an essential item for any technician's toolbox and a great homeowner problem-solver.

This refrigerant leak detectant coated, and remained in place, even when sprayed on vertical pipe. The bubbles, that are created from a refrigerant leak, do not pop. It will create a mass of bubbles that continue to collect on the location of the leak. I’ve used off brands, and other manufacturers. Yet, in my personal opinion, this product works more efficiently, and clings to surfaces, better than the competition.

I love this stuff! It is so good! I wish it came it a smaller size for people doing a DIY mini split install. I used 10 pump's, the rest will go to wast. Sad Face!!!

This leak detection solution is pretty good at finding leaks. The spray bottle it comes in is not good though. I would recommend the solution but maybe get another sprayer for it

Great A/C leak detection….. Worth buying ….

Worked great to find leaks. I had several in my minisplit copper line connections. Helped me find the bad flare jobs. It is a bit messy. Basically seems like dish soap mixed with a bit of water. It has that same consistency. Needed to clean up with an old rsg

I bought this for some work on an AC system. Soon after I found myself with a leaking tire. With this spray only a few minutes were required to find the leak (a very short self-tapping screw hidden in the tire tread). A few sprays and the bubble appeared rapidly. Looking forward to use on various systems.

Edit: this product leaves an oily residue behind. Oil is the easiest way to detect leaks visually first. Learn how to find leaks without it, and when you need this, it'll save your neck. But, if you're new, and can't find the leak, don't use it and ruin the experienced technician's attempt when he comes in after you. This is a thick solution that will hold on to the sides of vertical pipes. I was a helper for a senior technician out in the field on a brazing call. He charged the system with nitrogen, used some soap and water on a recent braze, found nothing, and I come in with this product. He got a little bent about the fact that I wanted to double-check his work, but he couldn't really say anything when this one found a leak that he couldn't see.