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⚡️ Seal the deal on engine power—don’t let compression slip away!
Rislone 4447 Compression Repair Fix with Ring Seal is a 16.5 oz universal engine additive designed to restore lost compression, reduce blow-by, and free sticky rings in gasoline and diesel engines. Trusted by thousands with a 4.3-star rating, it improves engine performance and longevity with a medium to high viscosity formula suitable for cars, trucks, motorcycles, and ATVs.










| ASIN | B00CGRX6RE |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | 8,278 in Automotive ( See Top 100 in Automotive ) 105 in Fillers, Adhesives & Sealants |
| Brand | Bar's Leaks |
| Brand Name | Bar's Leaks |
| Compatible with Vehicle Type | Car, Truck, Motorcycle, ATV, etc. |
| Container Type | Bottle |
| Customer Reviews | 4.3 out of 5 stars 1,929 Reviews |
| Global Trade Identification Number | 00078615044474 |
| Item Weight | 159 g |
| Liquid Volume | 16.5 Fluid Ounces |
| Liquid volume | 16.5 Fluid Ounces |
| Manufacturer | Rislone |
| Manufacturer Part Number | 4447 |
| Model Number | 4447 |
| Number of Packs | 1 |
| Package information | Bottle |
| SAE J300 Viscosity Grade | 30 |
| Size | Pack of 1 |
| UPC | 078615044474 078615444472 |
| Unit Count | 487.9632 millilitre |
| Vehicle service type | Car, Truck, Motorcycle, ATV, etc. |
| Viscosity Level | Medium to High |
K**S
Incredible stuff!!!
Purchased this in desperation as my motorbike had lost compression in one of its cylinders so it was this stuff or bike sold as spares and repairs . Used 3/4 of the bottle and the bike is running like new..... can't fault it!!!!
A**R
Good
Great thanks
I**E
Seems to doing the job.
Seems to be working so good so far. I could feel a definite improvement with the compression and any smoke from the exhaust under load a acceleration also has stopped. How long it will last only time will tell.
G**S
Little bit of piston slap
It actually works so I'm well pleased
M**R
It works!
Was advised to use this by a mechanic for a worn piston ring. The car had beforehand occasionally smelled like burning oil. It took a few days to work - But no more burning oil smell. Chances are it'll pay for itself as I won't be refilling the oil so often.
P**.
Do not buy... did not work even in a little 1.2 peugeot
WASTE OF MONEY !!! Car failed on emissions and blowing small amount of smoke from burning a little oil bought this, put it in and took it back to MOT and they've said its a lot worse now so it really doesn't work. The consistency is that of gearbox oil maybe a little thicker but I used gearbox oil in the past with better results than this.
M**S
Does what it says on the tin
Used this for the last 3yrs to help my 22yr old Mercedes engine, improved compression and quieter running. Was on offer for £10 this time so was a no brainier.
J**N
Not 100%
It sure helps but I was expecting more.
C**N
Funcionará
Hasta proximo cambio de aceite no oo usaré, ya q eche sellador de junta de culata y no se pueden mezclar. Pero conociendo la marca seguro q va de maravilla.
T**Y
Partially good
i ordered the product first time it was delivered, and it was great. but when i place an order for second time i didn't receive it, but thanks to the Amazon customer care that step into the issue and the seller refunded me back my money, despite all that i recommend the seller and the product and hopefully i will reorder the product again if need be
L**E
Works like magic
It’s amaizing. Just let the engine run for 5 minutes and the knock sound was gone
A**A
Perfomance of car improved
Good product
J**T
Cela ne sert à rien
Pas d’ effet
Trustpilot
2 days ago
2 weeks ago