

🚗 Keep Your Ride Smooth with Johnsen's Magic!
Johnsen's 4918 Radiator Stop Leak is a 12 oz. solution designed to seal leaks in your radiator, preventing overheating and engine damage. With a compact size and trusted brand reputation, it's the go-to choice for quick and effective repairs.





| Manufacturer | Johnsen's |
| Brand | Johnsen's |
| Model | 600903 |
| Item Weight | 0.319 ounces |
| Package Dimensions | 6 x 3 x 3 inches |
| Item model number | 4918 |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | 4918 |
| Voltage | 12 Volts |
C**Y
Leak Stop
This product was a good investment. The results were good and today the air conditioner is still working. It saved me from a very costly bill for my car.
T**N
Did not work at all!
Had a tiny leak between the plastic frame and the aluminum radiator, it was just leaking a little, like a shot glass on 20 miles. That stuff didn’t do it’s job at all!
A**N
Five Stars
Put two cans into my Suburban with my normal summer charge and my air has been cold all summer.
L**E
Only time will tell.
I won't know for a while whether my slow leak is sealed. Ask me again in twelve months! Hopefully I won't have to add more refrigerant.
D**M
Five Stars
Worked well. Has held up for a lot longer than I expected.
R**0
Wrong picture
The picture shows Castrol Brand but what was actually sent was Johnsen's Leak stop. The writing is correct but NOT the picture.
J**N
Johnsen's (6536) R-134a Stop Leak - 4 oz.
works well for what I need to stop a very slow leak it also filled my unit the rest of the way since 2 cans of Freon was 4 oz shy of filling it saves money if u can afford to have your compressor seals replaced or O-rings.
G**N
Three Stars
EASY TO USE, BUT I AM NOT SURE IT STOPPED THE LEAK
TrustPilot
3 周前
2 周前
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