LECWEC Logo 2LECWEC Logo 2LECWEC Logo 2LECWEC Logo 2
  • Advantages
  • Videos & Feedback
  • LecWec
  • FAQ
  • Contact
  • 🇩🇪
  • 🇫🇷
  • Advantages
  • Videos & Feedback
  • LecWec
  • FAQ
  • Contact
  • 🇩🇪
  • 🇫🇷

Power Steering Leaking Oil
Fix Leaks Without Removal


If your power steering is leaking oil or the reservoir constantly needs refilling, the cause is usually aged or hardened seals. Due to pressure and temperature, these seals lose their sealing ability over time. With LecWec, you can restore the sealing effect directly during operation without removing the steering rack or pump.

✓Oil leak stop for power steering systems
✓Fast and reliable sealing effect
✓Oil sealing additive without chlorine
✓Seal leaks without removing the steering rack


Order Now
Lecwec Flasche 100ml final Pfade

How LecWec Works in Power Steering Systems

In power steering systems, polymer seals inside the steering rack, pump, and hoses keep the hydraulic fluid contained within the system. Over time, pressure, temperature, and aging cause these seals to lose their elasticity. The result: fluid leaks at sealing points or the fluid level drops continuously. This is exactly where LecWec takes effect during normal operation.

After being added, LecWec circulates through the power steering fluid and reaches all sealing points within the system. The active formula is absorbed by the seals and helps restore the material to a flexible, smooth, and tightly sealing condition. This allows fine gaps between the seal and metal surface to close again.

In practical use, this means that fluid loss in the power steering system is significantly reduced or completely stopped. LecWec restores the sealing performance of the existing components and enables reliable operation without removing the steering rack or pump.


Only 3% of the total oil quantity.

LecWec is chlorine-free.

For all oil systems and types.

Direct delivery from the manufacturer.
LecWec Erfahrung im Video

It happened even faster than I expected.

"I have to report positively that the level matches the oil... unbelievable. [...] I wouldn’t have believed that the steering gearbox would be sealed again after just under a week."

Play video on YouTube.

By clicking play, you agree to YouTube’s privacy policy.


"...nothing was leaking anymore!!! I am truly very satisfied. At first, I did not believe the product would work, but now I am completely convinced and also saved many hundreds of euros!"
- Jürgen R.

Oil leak at the cylinder base gasket

Verified review (Learn more)

"I did not believe it at first, but your product is excellent! [...] I ordered just one can and everything is sealed already, even though you recommend 2 cans, meaning 200 ml, for 6 liters of oil. Many thanks!"
- Andreas F.

Oil leak problems at the oil flange gasket

Verified review (Learn more)

"...which made it even more satisfying when, after around 3 weeks, I noticed that the oil loss had gone down to zero – the steering rack was sealed again!! Even now, after 4 months, the reservoir is still at the maximum level."
- Friedger F.

Oil leak at the steering rack

Verified review (Learn more)

"There was always a small puddle of oil collecting underneath the vehicle. I added 100 ml of LecWec to around 4 liters of oil. Since then, I have driven many miles and was surprised to find that there was no more oil on the ground at all."
- Paul R.

Leak at the oil pan

Verified review (Learn more)
3 Flaschen LecWec final Pfade

How to Seal a Power Steering System in 3 Steps

If your power steering system is leaking oil, this is usually noticeable through oil spots underneath the vehicle, a dropping fluid level, or stiff steering. The cause is usually aged polymer seals. Instead of removing the steering gear, you can address the issue directly within the system.

Step 1: Check the fluid level in the power steering reservoir and determine the total fluid volume.
Step 2: Add LecWec directly to the power steering reservoir at a ratio of 3% of the total oil volume.
Step 3: Turn the steering wheel while stationary and during driving – the additive will circulate throughout the entire system.

The seals absorb the active formula, become flexible again, and fit tightly against the sealing surfaces once more. This stops oil leaks at the affected areas. You avoid removing components and restore the power steering system to a sealed and fully functional condition.

Power Steering Leaking Oil? These 5 Tips Can Help

Identify the exact leak location
Clean the hoses and steering rack thoroughly and turn the steering wheel while stationary. This helps determine whether the oil is leaking from hoses, connections, or the steering rack itself.

Check the fluid level regularly
A fluid level that is too low can damage the power steering pump. Keep the level within the specified range at all times.

Inspect hoses and connections directly
Leaks often occur at fittings or porous hoses. Inspect these areas carefully and thoroughly.

Restore seals directly
Power steering systems use polymer seals that harden over time. Through targeted treatment within the system, the sealing performance can be restored.

Use LecWec correctly and monitor the results
Add LecWec to the system at a ratio of 3% of the total oil volume and turn the steering wheel several times. Afterwards, check the sealing performance. In many cases, the oil leak is significantly reduced or completely stopped.

Questions and Answers about LecWec

How Does LecWec Work?
Replacing a leaking oil seal is usually not an inexpensive repair. If an entire component needs to be replaced, the costs increase even further. Since 1995, however, “LecWec” has provided a permanent repair solution for polymer oil seals without disassembly or replacement, and without major time or repair costs. LecWec is not only effective for vehicles, but for all oil systems and all types of oil. Over time, polymer oil seals lose their plasticizers, become brittle, and shrink. LecWec impregnates the seal material and replaces the lost plasticizers. The seal becomes flexible again and expands slightly – exactly enough to compensate for wear at the sealing lip.
3How Much LecWec Do I Need for My Power Steering System?
The required amount depends on the total oil volume within the power steering system. The dosage is exactly 3% of the total oil volume. For a system containing 1 liter of power steering fluid, this equals 30 ml of LecWec. The additive is added directly into the reservoir and circulates throughout the entire system during operation. This allows LecWec to reach internal sealing points within the steering rack and power steering pump.
How Long Does It Take for LecWec to Work?
LecWec does not work instantly but requires a certain amount of operating time to take full effect. After application, the engine should initially run while the steering wheel is turned several times from lock to lock so the product can circulate through the system. The effect then continues to develop during normal operation. Depending on the condition of the seals, it may take several hours to several days for the full effect to develop.
How Long Does the Effect of LecWec Last?
The effect of LecWec is designed for long-term sealing performance. Once the product has fully developed its effect, it usually remains effective for years. The requirement is that the product has enough time to circulate through the system during operation and fully interact with the seals. Once the full effect has developed, LecWec permanently keeps the seals flexible and leak-free.
3How Reliably Does LecWec Stop Oil Leaks?
LecWec reliably stops oil leaks when they are caused by aged or hardened seals. The active formula circulates through the oil system and reaches all relevant sealing points. The seals become flexible again and fit tightly against the sealing surfaces. As a result, the oil leak is significantly reduced or completely stopped.
3When Does LecWec Not Work?
If components are mechanically damaged, such as worn steering racks, damaged sealing surfaces, or defective hoses, LecWec cannot fully seal the leak. In these cases, mechanical repair is required.
3Do I Need to Disassemble the Power Steering System for LecWec?
No. LecWec is added directly to the power steering fluid and works during normal operation. Disassembly of the steering rack, power steering pump, or hoses is not required, provided the oil leak is caused by aged seals.
5Does LecWec Also Help on Older Power Steering Systems?
Yes. Especially on older power steering systems, sealing lips and O-rings are often hardened or shrunken. LecWec restores the elasticity of these seals and can significantly reduce typical leaks in the steering rack or at the power steering pump.
6Does LecWec Help with Steering Racks and Power Steering Pumps?
Yes. LecWec can help with leaks in the steering rack and at the power steering pump, provided the cause is aged seals or shaft seals. In cases of mechanical wear such as worn rack surfaces or defective pumps, the effect is limited.
6Can LecWec Also Be Used Preventively?
Yes, LecWec can also be used preventively to keep seals flexible over the long term. Especially in vehicles with high operating hours or long periods of inactivity, the application helps prevent seals from drying out and becoming brittle. For preventive use, a reduced dosage of 1.5% of the total oil volume is recommended. This keeps the seals elastic and significantly reduces the risk of future leaks.
Can LecWec Damage the Engine or Transmission?
No. LecWec is developed to fully blend with the existing oil without affecting lubrication performance. It does not attack metal components and does not alter system tolerances. Bearings, gears, and other components remain completely unaffected. LecWec works exclusively on the seals within the system. When used correctly and at the proper dosage of 3% of the total oil volume, the application is safe and has no negative effect on the function of the engine, transmission, or hydraulic system.
8How Much Does LecWec Cost and Where Can I Buy It?
You can buy LecWec directly online in our online shop. There you will also find all current prices. Alternatively, you can send us a message below and we will gladly help you with your question or order.

+49 89 - 90 35 638


Monday - Friday
9:00 AM - 5:00 PM


order@lecwec.de

    © LecWec
    Legal Notice | Privacy Policy | Terms and Conditions | Reviews | Hazard Information
    Richard Chambers GmbH | Dahlienweg 14, 85551 Heimstetten, Germany | +4989 - 90 35 638 | order@lecwec.de

    Seal engine oil | Engine sealant oil additive | Oil Stop Wiki | Oil additive against oil loss | Engine oil additive for sealing | Stop leaking oil on motorcycles | Engine oil sealant | Engine oil leak stop | Engine oil sealing agent | Engine oil stop | Oil stop for engines | Oil leak stop additive
    Web design with