ATP Automotive AT-205 Re-Seal Stops Leaks, 8 Ounce Bottle

Okay, where do we begin. I bought my vehicle from a dealer who bought it from an insurance lot. Something has fallen onto the vehicle and crashed the hood and the surrounding areas. But the engine bay was untouched. The vehicle sat at the insurance lot for about 6 months without being started. Once the dealer purchased it he took it to a body shop where they fixed all the body panels the hood etc. Then when they try to sell the vehicle they had a hard time selling it because it was a six-speed manual transmission. So it's sad at the dealership for another 4 months. Now all this sitting and not running caused the rear main seal to dry out. After I purchased the vehicle about 3 months into driving a substantial leak happened at the rear main seal where I was losing about half a quart of oil a week. Took it to the dealership the estimate to fix it was around $3,800. Called a independent mechanic it was about 2800 to $3,000 to fix it. I just did not have that amount of money to throw at it. So I started searching online and stumbled upon AT205. Now before I purchased this product I did my due diligence did the research watched the video of the manufacturer. Educated myself and how is this product different from any other stop leak product. And where I was sold was that this product did not swell the seals but what it did was or what it does is it rejuvenates and restores the elasticity and the plasticity of the seals due to the plasticizers and plastic stabilizers that this product contains. So I bought it. The product arrived quickly, and as quickly as it did arrive I poured it into my engine. I mean what's the worst that can happen, it doesn't work right. I followed the instructions drove the car around for about 30 minutes to let everything mix in. And then it was time to drive and get about 5 hours of driving time. It took about 5 days of commuting back and forth to work to get those 5 hours in. After about 3 hours I noticed when I would stop at a parking spot for extended period of time and I would move my vehicle instead of having 10 drops of oil under the engine I would have three or four. After about 5 to 7 hours of driving The only oil left was the residual oil on the bottom of the engine that I have not wiped off yet because a car is too low to the ground. It's been about 2 weeks now and I have zero drips of oil under my car. Fresh oil that is. At my house in the driveway I still do have the oil spots from the leak that were there before I use this product. As of now there are dried out and everyday I check for new spots and I see any. I'm highly satisfied with this product and what it has done thus far. How is it going to work in the future I don't know. Will the oil leak come back with my next oil change not sure. But what I do know as of right now there's no leak. I'm thinking about buying another bottle and add it with my next oil change just to be sure that those seals get the love that they need to be able to seal the engine properly for a long time to come. One thing I'm going to do is, I will update this review a year from today. If you have a car that has a front main or rear main seal leak or any other leak when your engine try this product out it might just save you hundreds of dollars that you may or may not have. Yes I highly recommend this product to anybody that has a engine leak.

WOW!! ABSOLUTELY AMAZING!! I never write reviews but felt I needed to for this product. For years I've had oil leaks in my 2005 GMC truck and tried multiple products to try to stop it to no avail. It's gotten to the point where I had 3 or 4 different leaks in various areas. I would park at a store for 10 minutes and come out with several oil droplets on the ground. It was embarrassing. Mechanic said in the areas it was would be very expensive to repair. Tried this product with lil expectations cause nothing else worked. The result was simply amazing!! Zero and I mean zero leaks after using this product!! I can't believe it!! Now if it lasts is the next question but couldn't be happier at this point. Great product!!

Worked Great!!! I used this in my 2003 Ford Ranger 4.0L. Old Engine broke a timing chain and ruined the engine (162,000 Miles) . Upon Mechanics advise I replaced the engine with a used engine of 88,000 miles. "No telling how long the engine spent setting, and I am positive now that all of the gaskets were dried out ". After install, I noticed a slow leak showing up. When I asked my mechanic about adding any Engine stop leak he immediately "No". Drive as much as possible and let the oils heat up and saturate any gaskets and see if it stops. No Burning Smoke, Not loosing any coolant, so I went online searching for info and came across this ATP. I Trouble shot a lot of options and figured it might be the Rear Main Seal, but just not sure. Researched options and came across This Stuff!. Not like some of the other additives that can clog other part and cause more problems, I figured for around $10 why not try. Glad I Did! As the Directions State to add the correct amount to your oil (Mine came out to 6.6 oz from the 8oz bottle for a 5qt oil). Drove to town and around letting the Engine get to, and run at normal heat for at least 45 min. before making my first stop. A few more start & stops and then the trip home. Parked the truck on the concrete pad with oil dry covering any old leak spots. Parked the truck over night and WALLAH!! the next morning.. No new leak spot! This stuff is thin and not thick like other brands sold at Auto Parts Stores, So I am confident it rejuvenated and swelled any rubber type seals in my engine without clogging or plugging like other brands. I plan on even changing the oil to confirm it has completely worked. I am very confident it has. I HIGHLY RECOMMEND this ATP Product for any suspicious slow leaks that may come from any Rubber Gaskets. Do your research, but this was the best $10 I ever spent and Shipping was faster that originally stated. Original tracking stated 4-10 Business days. I received mine in 3 days. I will defiantly buy again to have on hand for any future needs. Has a lot of use potential. I hope any future users have the same results if Gaskets are not totally blown out! As stated on the product description. Good Luck! It's worth the $10 vs costly tear down and gasket replacement. ATP AT-205 Re-Seal Stops Leaks, 8 Ounce Bottle PS..This is not currently found in any Auto Parts Stores. THANK YOU AMAZON!! I showed the bottle to one of my ASE Mechanic buddy's who is a store manager @ an O'riley's and he had never seen or heard of this stuff. Blue Devil, yes.., but not this. Thanks Jerry31368

First off the label says it it non-toxic, which is kinda strange considering that it also says not to allow it to contact skin, eyes, painted surfaces and brake systems. I guess what they mean is that it can cause serious injury but wont kill you. Anyway the good stuff: Claims to work on: Engine leaks Transmission leaks Power steering leaks Rack and pinion leaks & any other fluid system Exception: do not use in brake systems. Pros: Does not appear to mush out (over-soften) rubber seals/rings when used full strength (undiluted). Seals seem to retain their elasticity and tensile strength (great). Not much odor, clear and easy to handle. Cheap for what it claims it does. Cons: Tiny bottle 8 oz. Observations: So far, I have not yet seen where the rubber seals/rings increase in size (expand) when soaked overnight at full strength (this was a bit odd). Cheap enough to be used for testing purposes. Based on limited testing I can only say that it seems that it would only seal very tiny leaks, since the rubber seals dont appear to swell (within human perception). I will update when further info becomes available (shortly). I am currently testing on a few items: transmission dipstick seal, civic top cover bolt seals, AC coupler o-ring, distributor seal, suspension bushing (front and back), radiator cap seal (watching this one closely). I will also change the rating - i hope it will do well. Update on Nov 10, 2012 Transmission dipstick seal - works great, its now firmly in place - was very loose before using. Engine Oil dipstick seal - works great, its now super firm in place Note: Both dipstick seals took a whole week to swell and notice the difference. Civic top cover bolt seals - just applied some today, have to wait on results. AC coupler o-ring - no visible signs yet. Will have to use on live AC system to test. Windshield wiper rubber - Not recommended, rubber becomes too sticky and uneven - does not clean debris well after use. Update to Jan 26, 2013: Used it to stop a small power steering. It did make some difference to slow the leak even more. It did not stop the top cover bolt leak, nor the small transmission & engine leak (Only used a little in all three). Radiator cap seems marginally more prone to leaking after the fact. So I guess this product works best under certain "ideal" conditions. I would still buy it for specialist applications due to its cheap cost.

I have to say that it is very rare I would ever use or recommend anything from the "snake oil" section of an auto parts store This AT-205 I had researched and felt as comfortable as one can be using any additive. I had purchased a 2006 Ford Explorer with a very minor leak at the rear main seal. I am sure starting with a very minor leak helped too. The vehicle literally looked brand new. It looked like the leather seats had never been used. There was not a single mark on the paint. The motor and transmission worked flawlessly. The only thing I intended to do is replace the plugs with high end Iridiums, the old ones were worn but nothing about their condition otherwise. Its a big job to replace the rear main seal so I decided to give this a try along with a high end oil and filter change then another after a short time to help remove some of the sludge. I added a bottle of this with the second oil change and obviously the seal swelled as intended and there was no more leak. I had a motor that had been well maintained and a very minor leak. Had the leak been worse I suspect this would not have worked as well, fix things fast before they get worse and more expensive. But I was fortunate and this additive was a legitimate product and did what it was designed to do. There is no question this worked in my case and saved me big money if I had needed to replace that seal If your leak is minor then I have to recommend giving this a try. It is one of the rare items that actually worked as intended. I am very happy with the results. I have watched how spraying this on rubber suspension parts extends their life as they do dry out. Not a bad idea and perhaps save some big amounts of cash.

I bought a used Tundra with 140K miles on it that I knew had a leaking rear main seal. It was a $1000 repair if you get a really great deal. I ended up getting the truck for a really good price and was prepared to get the rear main seal fixed. I ended up putting it off and it was going through a bout a quart of oil in 5000 miles. I wasn't worried. Some German cars tell you going through a quart every 800 miles is normal. WTF? My old truck had the transmission go out on the road and I had to get it rebuilt by AAmco. They convinced me to replace the rear main seal while the transmission was out even though it wasn't leaking. I continued my trip, had the transmission checked out as required. I was informed then that the new rear main seal was leaking. On my way home I stopped at the Aamco transmission shop to get it fixed under warranty. Unfortunately it was Saturday. They told me I would have to stick around for 2-3 days but they would fix it for free. They also told me that I could just get it fixed at an AAmco near home. This turned out to not be true. The Aamco near home wanted another $1200 to replace it. I wasn't going to pay another $1200 after just paying $3500 to for the trans rebuild. I ended up putting some stop leak product in the Transmission. It slowed it down but never completely stopped it. After getting a few estimates to get the rear Main seal replaced I decided to look into Transmission Stop Leak again. I found this product and it seemed better than what I had used previously and that worked OK. I put it in according to instructions and drove around with it until my next oil change was due. I took it to a local Toyota dealership which had very reasonable oil change prices, only about 5 dollars more than it would cost me to buy the oil and filter. Tundras take 8 qts of Full synthetic. They confirmed that I needed a rear main seal. I asked them what about putting Stop Leak in the Transmission. They told not to do that because there was a good chance it would ruin the transmission. Well too late I had already used it. I decided to wait and see what would happen because it had only used 1 quart between oil changes. Oil is a lot cheaper than replacing the rear main seal. I am so glad I did because as per their instructions before I went back for the next oil change I cleaned the motor off really well with degreaser and a pressure washer. This time they told me that it wasn't the rear main seal that was leaking but the Cam Towers. This was goin go be $4200 to fix. Since it was using less oil I decided to wait a little longer to see what happened. The bottom line is AT-205 RE-Seal didn't ruin my motor. It did stop the oil leaks though. Toyota told me I had very slight weepage around my valve cover gaskets but never either of the other 2 oil leaks again. I can only assume they thought I got them fixed. I cleaned up the under carriage a few more times to check on things and was amazed at how well this product worked to soften up those seals to stop the oil leaks. I now have more than 180k miles on the Tundra and the only time it uses oil is towing a trailer at 70-80 mph for long trips. This product is a bit more expensive than some of the brands but in my opinion well worth it.

I was apprehensive to even try it. Many of the Rear Main Seal leak repair additives available may do harm to other components of the engine. After extensive research I deduced that this is the only one worth trying without potentially doing more damage than good. I figured it was worth a try before having to pull the engine and replace the seal itself. After adding the bottle to the engine oil as instructions indicate, I noticed the leak was gone within 1 day of normal driving!!! I thoroughly cleaned the engine to ensure I could see any new oil leak and the leak appears to be gone!!! I would definitely recommend it as worth a try before pulling your engine and replacing the seal. Bottom line: it appears to work, at least in my case. Best of luck to you all.

I just measured exactly 6 oz to put in my Honda Pilot which holds 4.5 quarts of oil and there was only 1 oz left in the bottle. It does not have a total of eight fluid ounces at least not in my case. If you get a bottle please measure and let us know. I just put it in so no info on stopping leaks.