BlueDevil Products 00234 Rear Main Sealer - 8 Ounce

After noticing the rear seal leaking on my driveway from my truck. I stressed thinking about the cost of the repair. However, my brother a master technician said, since the leak was small try Blue Devil before dropping $1800 on the repair. After pouring the Blue Devil in the transmission, I saw a very small change the first day. However, a few days later and about a 100 miles the leak is completely gone. This stuff works.

Significantly reduced oil leak from rear main seal. Didn’t last though. Maybe if I would have done this early on.

Ok so I have a 2008 Cadillac Escalade EXT. 6.2 and all wheel drive. About 100K miles and it has had a minor oil leak for about a year or two. Talking a couple drops on the driveway overnight. Then after a road trip towing my camper around 200 miles total I did an oil change and the next day the oil leak was massive. The day after changing the oil I got the "low oil pressure, shut off engine!" alarm. It was at that point I cold see oil dumping out while idling. It was a consistent drip to the tune of 2 quarts a day on my daily commute which is only 30 miles total. Upon searching for the source I was able to see it was the rear main seal. I tried the Blue Devil RMS product. It did slow the leak but I was still losing at least a quart of oil every 30 miles or so. Now my truck is in the shop getting the rear main seal replaced. This job calls for the transmission, transfer case, cross members, drive shafts and exhaust system to be removed to replace this $30 seal. While the truck was at the shop and the trans removed I asked the shop to change the oil pan gasket as well because with my luck the oil pan gasket would start leaking a month later. Total cost is $2,000 for the rear main seal and oil pan gasket. I wish the sealer would have worked, but I guess my leak was way too much for it.

My 1999 honda civic was leaking oil through the rear main seal . After trying different sealers this the one that did the job.

I had high hopes that Blue Devil would at least slow the leaking rear main seal on my 2013 Ford Escape. Nope. The product made not a bit of a difference. Still leaking as bad as before.

It hasn't worked on my rear main leak yet after 100 miles.

It stop the leak on my 2007 honda odyssey crankshaft rear end seal. I was loosing 1 quart of oil every 3 weeks. Don’t know if i need it every time i change my oil, but it stop the leak 1 week after i add it to my oil.

This product is working great on my Mercedes rear main seal leak. It took a couple of hundred miles to reach its effectiveness. Very satisfied.