SKU: 95048986382

RISLONE Heavy Duty Rear Main Seal Repair 44240

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Ships within 48 hours · Estimated delivery Aug 29 - Sep 3

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Description

RISLONE Heavy Duty Rear Main Seal Repair 44240Most rear main seal leaks are caused by a combination of normal wear in the crankshaft & seal and the drying, hardening and shrinking of the main seal. Rislone Rear Main Seal Repair restores the seal to like new condition and also contains additives to stop leaks in severely worn seals and crankshafts. Compatible with all petroleum based engines oils including high mileage kilometer and synthetic. Works with ALL vehicle types including petrol, LPG,

Most rear main seal leaks are caused by a combination of normal wear in the crankshaft & seal and the drying, hardening and shrinking of the main seal. Rislone Rear Main Seal Repair restores the seal to like new condition and also contains additives to stop leaks in severely worn seals and crankshafts. Compatible with all petroleum based engines oils including high-mileage / kilometer and synthetic. Works with ALL vehicle types including petrol, LPG, diesel and turbocharged.  
  • Stops All Oil Leaks
  • Seals Timing Cover, Cam Seal, Rear Main Leaks
  • Seal Restorer
  • Seal Polymer

Dosage & Directions 

Dosage
1 bottle treats 3.5 to 6L of oil. Larger systems use 1 bottle for every 5L of oil capacity.

Directions
Add entire bottle of Rear Main Seal Repair to engine crankcase at or between oil changes. Do not overfill. Most leaks will stop within 150 km or 2 days of driving. To prevent future leaks, install Rear Main Seal Repair every 8,000 km or with every oil change.

Compatibility

Rislone Rear Main Seal Repair works with all petroleum-based motor oils including conventional, high kilometre and synthetic formulas.

Use in ALL 4, 6 and 8 cylinder vehicles, with petrol, LPG, Diesel, turbo or racing engines. Works in motorbikes/vehicles with a wet clutch system, however dosage is is 93ML/1L of oil.

Rislone Rear Main Seal is comapatible with Rislone Engine Treatment, Rislone Compression Repair and Rislone Oil Treatment..

If you are unsure what other additives could be in the oil system prior to adding Rislone, it is recommended to flush the system first.

Frequently Asked Questions

What is a rear main seal?
A rear main seal, also known as a main seal or rear main bearing seal is located between the engine and transmission. The crankshaft (the internal engine part that the pistons are connected to) sticks out of the rear of the engine, and the flywheel & transmission bolt to this crankshaft. The engine oil lubricates the crankshaft, pistons and other internal parts of the engine. The rear main seal is inserted into the back of the block and fits snug around the rear of the crankshaft and keeps the engine oil from escaping.

What are the symptoms of a rear main seal leak?
Depending on the severity of the leak the first thing you may notice is the oil level going down. The next thing that happens is spotting, where you will find oil spots, located on the driveway or garage. While looking under the vehicle around the area where the engine and transmission connect, you will find oil dripping, or an oil residue with dirt caked on this part of the vehicle, most noticeably under the oil pan and the front of the transmission. In some transmissions, it will actually be the oil leaking out of the front of the transmission. In some manual transmission vehicles, you may also notice some slipping of the clutch, which can occur with a leaking rear main seal.

What causes the rear seal to leak?
The most common cause of rear seal leaks is age and/or high kilometre. The seal can also leak due to the vehicle being stored for an extended period of time, or from running the engine low on oil. This causes drying and hardening of the seal leading to shrinking, cracking and tearing of the rear main seal.

What other factors can contribute to a rear main seal leak?
A few things can cause a rear main seal leak to worsen, which are not the fault of the seal itself. If the oil level is two high (filled over the full mark) or the PCV (Positive Crankcase Ventilation) system is not functioning correctly, leaks can occur. The PCV system prevents pressure from building up inside the engine and if it fails, the pressure will cause the oil to leak out. It is a good idea to clean or replace the PCV valve regularly to prevent this problem.

Do I need to use Rislone Rear Main Seal with every oil change?
No, we have found that you can receive good results if you reuse the product every other oil change.

How do you replace a rear main seal?
For most rear wheel drive vehicles the transmission is removed to replace the seal. On front wheel drive vehicles, it is usually easiest to remove the engine to gain access to replacing the seal. Either way, this is an expensive procedure.

What else can be done to stop a leaking rear seal other than replacement?
Rislone Rear Main Seal Repair is one of the only products of its kind on the market specifically designed to solve rear seal oil leaking problems. There are special oil additives on the market that are designed to swell the rubber of the rear seal and cause it to expand, thus sealing off the leak. You can also try using thicker weight engine oil, like 50 weight. The thicker oil can fill in the gap between the seal and the crankshaft, and could slow the leak down.

How does Rislone Rear Main Seal Repair work?
This product works in two ways to help solve most any seal type leak.

1) The seal restorer additive restores seal size, flexibility and elasticity lost due to engine heat, age and high kilometers.

2) The seal polymer works by building a polymeric film around the rear main seal and also filling in any groove worn into the crankshaft by the seal.

What types of seals will Rislone Rear Main Seal Repair fix?
Because of the Rislone 2X Action formula, the product has additives to work on any of the three types of rear main seals, no matter what the material.

What are the different kinds of rear main seals?
(3 basic styles)
• ROPE SEAL: Also called a wick seal
• TWO PIECE SEAL: Neoprene or called rubber & Silicone
• ONE PIECE SEAL: Neoprene or called rubber, NBR or Buna N (Nitrile), Silicone, PA or Polyacrylate & Viton or Fluoroelastomer

Will Rislone rear Main Seal Repair clog my oil filter?
No. Unlike our cooling system products, Rislone Rear Main Seal Repair has no particles to plug the leak. It contains special polymers and seal conditioners to stop seal leaks.

Technical Information

SAFETY DATA SHEET
CODE: 44240
SIZE: 500ML

    Shipping Notes
    • Free Standard Shipping on $100+ Orders to the USA.
    • Except Preorder products are shipped in 48 hours.
    • Delivery to the USA:
    1. Standard Shipping : 3-10 business days
    • If time is of the essence, please consider selecting expedited delivery for faster service.
    Exchange/Return Notes
    • We offer a 30-day return/exchange service after receiving.
    • Final sale items are not eligible for returns or exchanges.
    • To process your return/exchange, please contact us at [email protected]
    • Please click here for more details>>> Return & Exchange Policy
    SKU: 95048986382

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    4.1 ★★★★★
    Based on 14 reviews
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    Verified Purchase
    Suzi blue
    Cuba, US
    ★★★★★ 4
    Low foam
    Color: Black
    Love this frother. It is great quality and the turn speed is amazing. My only issue is this. It comes w 2 wands and they are both singles. The single is great for stirring things up. It does not make a lot of froth and for some things it’s perfect but sometimes I like a lot of froth and I wish it either came w a single and a double or you could purchase a double separately to intermix. I don’t want to buy a whole other unit just for the double. I wrote to them bc the double frother they sell doesn’t look as good as this one but sometimes a girl needs a lot of foam and sometimes th stirring is perfect.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on February 20, 2026
    J
    Verified Purchase
    JMB
    Lake Worth, US
    ★★★★★ 5
    Mixes my protein shake powder
    Color: Blue
    My husband and I both drink protein shakes daily. We have vortex mixers that work great, but they are plastic and getting old, and really needed to be replaced. In an effort to reduce microplastics in our lives, I am trying to use less plastic mixing cups. I couldn't find anything small enough (other than regular blenders) with glass and metal parts that would work well for us. During my search on here, several frothers showed up. This one caught my eye because of the amount of sales, quick delivery, and of course, decent pricing. Some of the reviews had me a little skeptical, and time will tell regarding the longevity, but so far I am pleased. My protein powders are on the heavy side, but this little frother really gets the job done. Instead of having to use separate mixing cups (saving me on dishwashing), I just use my morning coffee cup (it's big enough) to mix my protein shake in. My husband just uses a regular glass. Neither of us can believe the power this little thing has. We are getting smooth shakes! Here is what I really like about it: It is powerful and mixes well; the frother is metal and not plastic; it cleans extremely easy; after making several shakes the battery has not died; can be used in glasses, coffee cups, even disposable cups (when we buy donut shop coffee); and I love the little stand which takes up barely any counter space. Less plastic, less clean-up, dependable (so far), and small, making it convenient even for travel. I'm really glad I got this, and hope it will last. One last thing, do not turn it on while cleaning under running water. (Yes, you can laugh.)
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 20, 2026
    D
    Verified Purchase
    David A.
    Bozeman, US
    ★★★★★ 5
    Powerful frother with a long rechargeable battery life
    Color: Black
    After purchasing three of the battery operated frothers. I finally found this amazing frother. It is very powerful so you do have to be careful not to slosh liquid out of your cup when you’re using it. But I have found it helps if you rotate the frother in a stirring motion while you are using it. That really helps keep the liquid from overflowing out of the cup. It has a sleek design and is rechargeable and the charge less about two weeks.I love this one so much. I take it with me when I travel. I actually left my original one at my mother’s house the last time I visited her and have ordered another one for my house. Highly recommend.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 27, 2026
    M
    Verified Purchase
    MJFinds
    Chelsea, US
    ★★★★★ 5
    Great Power and Creamy Foam
    Color: White
    This frother is amazing and has really good power. It creates creamy, smooth foam in seconds and works perfectly for iced lattes, cappuccinos, and matcha. I love that it’s rechargeable and lightweight, but still feels strong and high quality. As someone who loves coffee, this has become one of my favorite tools for making café-style drinks at home. Easy to use, easy to clean, and looks beautiful on my coffee station.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 20, 2026
    D
    Verified Purchase
    Desert hiker
    Lake Worth, US
    ★★★★★ 4
    Powerful easy to operate but splashes
    Color: Black
    Excellent frother--Very powerful and easy to turn on/off with one button. The only downside is it requires a deep container in which to froth. The frothing pitcher I had was too small and milk splashes everywhere. There is no lower speed so it works fast. I am using a deep insulated container now for frothing. Otherwise, very quite, easy to operate no pushing down on the top like other frother wands. I love it as long as I can control it to limit the splashing.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 31, 2026

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