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Radiator sealant LIQUI MOLY PRO-LINE RADIATOR STOP LEAK K

Radiator sealant LIQUI MOLY PRO-LINE RADIATOR STOP LEAK K

  • Model: PRO-LINE RADIATOR STOP LEAK K
  • Volume [ml]: 250
  • Brand category: Premium
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  • Manufacturer: Liqui Moly
  • Manufacturer part number: 5178
  • Category: Liqui Moly
  • Brand: Liqui Moly
  • Volume [Liters]: Не указан
LIQUI MOLY
5178
€23.21
Tax included Ready to ship: 3–4 days
In stock

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Purpose and Specifications

LIQUI MOLY Pro-Line Radiator Stop Leak K is a premium 250 ml sealant that permanently seals hairline cracks and small leaks in your radiator and cooling system. Safe for aluminum radiators, it works with all conventional coolants and antifreezes without harming the water pump or heater. One bottle treats up to 40 liters of coolant, keeping your engine cool during normal operating temperatures from -30°C to 120°C.

  • Quick fix: Seals leaks from stone damage or porous joints in minutes after adding to cold system and driving 10 minutes.
  • Preventive power: Use before leaks start; stays in system indefinitely for ongoing protection up to 100,000 km or 2 years.
  • Shelf life: 4 years unopened, store frost-free.

When to Use / Replace?

Use when coolant levels drop from small leaks or as preventive maintenance every 2 years / 50,000 km. No need to replace - it remains effective permanently without clogging lines. Ideal for cars, trucks, and motorcycles with water-cooled engines showing low coolant warnings.

FAQ

Q: How fast does it work? A: Leaks seal within 10 minutes of driving after adding to cold coolant.

Q: Is it safe for my aluminum radiator? A: Yes, fully compatible and won't damage pumps or heaters.

Q: Can I leave it in forever? A: Absolutely, it provides lasting protection without removal.

5178

Data sheet

Model
PRO-LINE RADIATOR STOP LEAK K
Brand category
Premium
Manufacturer
LIQUI MOLY
Brand
LIQUI MOLY
Volume [ml]
250

Shipping & delivery

We deliver across the European Union. Orders confirmed on business days are prepared and handed to the carrier the same or the next business day.

Delivery methods

Courier delivery to your door, or pickup at parcel lockers and points across our carrier networks.

DPDDHL ExpressGLSPostNordSmartpostiVenipak

Delivery time

Usually 1–5 business days, depending on destination and carrier.

Shipping cost

Calculated automatically at checkout by weight and destination. Free shipping may apply above a store-specific order value.

Packaging — built to arrive intact

Oil and lubricants are liquids, so we pack every order to reach you perfectly. This is the care that goes into each parcel:

Sealed, leak-proof bagEvery bottle is sealed inside its own hermetic bag, so even a cap loosened in transit can never reach the rest of your order.
Absorbent paper cushioningAbsorbent paper fills the empty space, softens every knock and soaks up any spill instead of letting it spread.
Branded sealing tapeEach box is closed with our own branded tape — a clear sign it left us fully sealed and untouched.
Handled as fragileClear fragile markings tell every courier to carry it gently, so your oil arrives exactly as it left our warehouse.

The result: a clean, sealed, undamaged parcel — because getting the oil to you intact is the whole point.

Returns

14-day right of withdrawal under EU consumer law. Items must be unused and in original, unopened packaging.

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