BlueDevil Products 00239 Hydraulic Stop Leak - 1 Quart

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.

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!

My 51 year old terramite backhoe showed significant leak stoppage.

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 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.

I was looking at a $2,000 replacement and thought I might as well try it. Added the fluid and ran it up and down about a dozen times every day. After three days the leak was definitely minimal and after a week no leaks at all. Will definitely use it again