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Your cart is empty.Leak detection UV dye for use in motor oil, transmissions, fuel and power steering fluid.
Teonia Logan
2025-07-10 12:18:33
I used on a Scag Kawasucki. They leak a lot of oil. No instructions. I used 1/3 of a bottle for 2 qts.
Harebare
2025-07-08 16:16:03
This is the best dye for use in r134a a/c systems. Only need 1/4 ounce per average vehicle a/c.
flycatcher
2025-06-28 16:53:36
My zero turn mower began dripping fluid on the garage floor. I was needing to top off both the hydraulic fluid and oil every few weeks, but suspected the fluid on the floor was from the hydraulic tank. So I ordered this dye and cleaned the gunk off the chassis of the 23 year old mower. I dumped the dye into the hydraulic tank, cut the grass for two hours and parked the mower in the garage.I went out to the garage shortly after sunset, and the dye showed fluid had dripped from an overflow tube on the hydraulic tank. I had topped the fluid off when I started mowing for the season about a month ago and had overfilled the tank. The dye was easy to see and I was relieved that the "leak" problem was solved without a service call for the mower.EDIT: Photo added - The accompanying photo was taken at dusk a day later after I had rinsed off the hydraulic tank. Some of the negative reviews mentioned that the dye did not work. I had not sealed the reservoir cap completely and some fluid had seeped out. You can see the yellow green fluorescence specs on the filler neck that persisted after a light rinse and a day left out in the open sunlight. The fluorescent effect will not show in bright light.
Private
2025-06-08 15:28:50
It doesn’t say how much to add, so I read online it should be a half ounce (half bottle). I had confidence when I saw it glow on the counter in the bottle with the black light, then I added half the bottle and ran the engine for 15 minutes: while I saw no signs of leaks, I checked the oil on the dipstick and drove it. When I looked after driving I did notice a leak which I got fixed.
John williams
2025-05-30 17:18:16
Excellent- 5 stars
CS
2025-05-17 14:16:16
I don’t have anything to compare it to, but it worked great for me. I poured to entire bottle (1 oz) into my snowblower which holds 1.5 quarts and used the cheapest black light Amazon had available. Let it run for a minute or so and voila. You can easily see the cracked block. Guessing I didn’t need the whole bottle, but ……..
Junior
2025-04-12 09:17:17
The garage told me I needed valve cover gaskets, it still leaked. Then the o ring on the dipstick tube, it still leaked. When they told me $650 for the oil pan gasket, I wanted to make sure. I bought the dye, put it in, and got underneath with a uv light. Turns out it is the rear main seal. I found a different garage to fix it. The dye saved me an unnecessary $650 and paid for itself many times over.
anthony
2025-03-30 13:20:44
I used it to help diagnose a fluid leak on my vehicle.
jaymemaurice
2025-03-18 17:50:28
When all the oils are mixed and you are trying to find the fresh leak from one important system, this stuff is a lifesaver.
morgan easy
2025-03-05 18:27:30
If you are going to add the product to the engine, put in only half of the bottle. Then drive on the highway for about 10 minutes then come home and check for leaks, with a blacklist.
Adam Lorenz
2025-02-24 21:35:32
This fluorescent dye is really strong. I feel I added too much to my power-steering fluid and wasted a little. I found my leak easily with the aid of a 21 LED flashlight for $8 I bought on Amazon. I tried looking for these at Canadian tire but they do not have this in Canada. We must pay a mechanic to do it without this cool money saving stuff. boo
FreddEM
2025-02-19 15:34:55
Used this to pinpoint oil leaks in an aircraft engine. Works as advertised.
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