AT-205 Seal Leak Stopper 8 Ounce - 2 Pack

My daily driver truck is over twenty years old. It has over 180k miles. We take care of each other. I have always attempted to take great care of her and in turn she's still very reliable. In the attempt to keep it running properly I've been adding Seafoam (one ounce SF per quart of oil) to the crankcase about 100-150 miles prior to an oil change to keep the valve train cleaner per advise from some old timers who know how to properly maintain engines. Once the odometer rolls another 100 or so miles I've drained the old oil while it's warm and refill with fresh synthetic high-mileage oil (high-mileage oil supposedly has extra additives to keep seals fresher). The last time I planned on changing my oil I added the 1oz/1qt Seafoam. I then got too busy and did not change it right away. After about 300 miles of driving the truck after adding the Seafoam I noticed an oil leak at the rear main seal area. I immediately suspected that the Seafoam solvent did exactly as it was supposed to do: clean up and dissolve old oil crud and grunge. Some of this crud was probably around the rear main seal area keeping that old seal from leaking. Like many who work on their own vehicles I resorted to YTube to get ideas to remedy the fresh oil leak. After watching many videos (some from seamingly honest mechanics) I ordered the parts needed to replace the failing seal. I also discovered many who claim they have had good success with a seal-refreshioning product called ST-205 made by ATP. I decided to order a couple of bottles of that too. See, the thing about older vehicles is that, in my experience, once a repair requires removing several components to access one that needs repaired or replaced sometimes you end up going all parts-cannon on it. Rather than fixing just the one issue you discover that by simply removing components you end up damaging other seals, gaskets, parts, etc. or things don't seem to go back just right. The temptation then is to open the billfold and attempt to do the "right" thing and replace anything suspect to failure. This is expensive, very expensive. So, I know that my initial reaction to the cost of ST-205 was like, "Woah, this stuff is costly," doing the in-depth seal replacement could be way more ouchy to the balance ledger. So, after receiving the ST-205 miracle juice and the parts to replace the rear main seal I added the recommended seal juice to the crankcase after the oil change. I then drove 150 miles to help a family member out. My truck remained in their driveway for three straight days not being used or started. I was traveling with the family member in their vehicle. Later that week I was about to start the truck and start the 150-mile trip for home. I checked the surface of the driveway under the truck for any oil drips. None. I checked the oil level on the dipstick. Perfect. After a month and a half and about 1400 miles since adding the ST-205 the truck has not leaked oil at all. At 183k miles she does use a little bit but oil is not leaking from the engine. I am happy with the ATP ST-205. It worked as claimed. The new rear main seal parts are now on a shelf in the garage whenever they are needed. If the ST-205 stopped a rear seal leak I can only hope that having it in the old truck is refreshing all the oil seals extending the entire truck's overall dependability. I would definitely recommend this stuff. Thanks ATP for manufacturing a good product as a reasonable price.

Excellent. Helps a lot with oil leaks in my old cars. I only use 1/8th of a bottle at a time for any car and it helps and works perfectly. I dont recommend using the entire bottle as the instructions say, just too much. Change your oil and add 1/8th a bottle. I even use it in my cars over 100k miles to never get oil leaks in the first place, works really well.

Numerous YT videos and online posts all agree this product is safe and effective, and it stopped minor seepage at the front of my 2020 Mustang Ecoboost engine. Also appears to have improved rubber suspension bushings and boots on my 2004 Thunderbird. My brother-in-law mentioned his 2008 GMC Sierra had developed a minor oil leak so recommended AT-205 and a week later he told me the leak was completely gone. This engine elixir may not solve every issue but based upon my three experiences it certainly can prove beneficial.

It was my last resort due to the fact I couldn't afford to replace my transmission at the time. A friend of mine gave me the name of this product and said they have been pleased with the results of this product at the garage he owns. At the time of purchase my tranny was leaking 3 drops of fluid a second. I added the first bottle, drove it a few miles and it was still leaking about a drop of fluid a second. The next day I added the second bottle and a little fluid. Drove it about 15 miles and was pleasantly relieved that the tranny wasn't leaking at all, nor has it leaked since and it's been about 2 months now. I highly recommend this product if you're someone like me with a truck that has over 230.000 miles and you're attempting to nurse it along any way possible. Since my purchase I has talked to a few different mechanics that said this will be a temporary fix and when it starts leaking again I'll have that choice to make, replace the transmission or get a new truck. We shall see what happens, although I'm very please thus far with the results of this product. I would recommend it and also would purchase it again.

Good price. Fast service.

This is not a traditional stop‑leak. It works by swelling old rubber seals, and when used correctly, it works perfectly. It cleared up a rear main seal leak for me with no issues. That said, it’s not a miracle worker and won’t fix internal mechanical problems or major leaks. As long as you mix it properly with engine oil, lubrication is fine despite what some videos show when people try using it by itself as a lubricant. Used the right way, it does exactly what it claims to do.

This stuff worked great for a oil leak in my motor that I couldn’t tell were it was coming from and I put a bottle in my transmission and it stopped a leak in my transmission and put a little in the power steering pump and it stopped leaking and stopped making a noise .

Did absolutely Nothing

Item as expected

This thing really works! Very impressive!

AT-205 Re-Seal stop leak !Used on my 2009 Ford SUV . First time I bought I added only one bottle . I should have used both . After oil & filter changed I start my SUV let run for 5-15 min. Depending on outdoor temperatures. Add to your oil and go for 30-60 min drive . Longer the better! We get cold winters in Alberta & first time I tried I didn’t drive enough the first few days ! 2nd try I had motor warm added both bottles & drove on highway an hour , after approx 300 km later my SUV ran like new ! Keeps all rings, rubber gaskets and seals lubricated , had P0304 & was worried piston ring needed replaced . Had fuel slowly going in my oil from misfires. Oil leak from oil pan gasket! I was told always add to warm motor after oil change and drive vehicle min 30 min ! Longer the better ! No leaks & SUV runs perfect! Best product I’ve tried a few & AT-205 RE-SEAL worth every cent ! I can’t remember who tested this product on you tube , will update this review with You Tube Video name ! Amazon only sells this. Haven’t ever seen in any stores in Alberta! 5+ STARS ! I have no leaks & use now only on bottle every time I change my oil. Update, with Penzoil Platinum synthetic oil only use half a bottle to keep seals, rings, in good shape! Amazing Product! Thanks Scotty! Use on all rubber in a spray bottle as well. It's a product we now always have some at home! My husband, kids, use it as well now!

ممتاز جداً

This is one of the best rubber and gasket restorer thus the reseal part of its name. It has many uses and can be used with rubber bushing to prolong its life and prevent cracking. It will help with other rubber parts that harden and dried out but not yet cracked and restore it to its former glory.