BlueDevil Hydraulic Stop Leak – 32 oz | Restores Seals & Stops Leaks in Hydraulic Systems | Safe for Pumps, Cylinders & Valves

I have bought many products claiming to seal leaks. But rarely did they work.This product worked as advertised. It sealed a pretty bad leak on my hydraulic cylinder. Saved me a lot!

Had a slow leak on my snow plow. Put just a little bit of this in and ran the hydraulics for about five minutes to work it in and I use the plow every day with no leak.

I highly recommend using this product before you pay hundreds of dollars to have your cylinder rebuilt. Awesome product.

Seals on my wood splitter was leaking fluid. Used the while bottle. Slowed leak but didnt completely stop it. Lesk was a 9 now its a 2. So far...

I bought a used tractor that had leaks coming from one of the pistons, and there was a tiny hole in a steel tube that was misting hydro fluid all over the top end of my motor and transmission. Hydro fluid dripping onto my customer's driveways is a big problem. I used the recommended amount of blue devil, and it wasn't much, and after a week or so the leaks were gone! So I used this product on another tractor I own, and got the same result. This stuff has saved me HUNDREDS of dollars in piston rebuilds. Replacing that metal tube would have been a major job that required tearing the machine half apart.Thank you Blue Devil!!

I first used this product to stop my engine oil from leaking. It worked! I used to stop at the gas station to check my gas and fill up my oil. That worked so well that I tried the product to stop leaks in the hydraulic system on my backhoe. Worked great! Probably saved $1,200. This stuff is great.

I had a small seal leak on my front tractor loader rams. I purchased this product in good faith with guarantee that it would work. I changed all the filters and changed the hydraulic fluid ( ten gallons) and added the stop leak product. It worked for a short period of time ( about 30 days ) and then the leak became very severe leaking well into loosing my hydraulic fluid. Cost of 180.00 for the hydraulic fluid plus the the cost of 2 bottles of product. I hope that the Company makes good on the warranty..

Product probably works ok, but one of the bottles was damaged and some of the product leaked out. Amazon won’t replace without returning the damaged bottle, which is too much trouble since I’m 20 miles away from a return center. So, my loss, I guess.