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GOSS  |  SKU: GUDCW

Goss Chem i Weld 325Ml

$1299
Tax included Shipping calculated at checkout.

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Delivery and Shipping

  • Shipping is a flat rate of $11.95, *however occasionally Heavy or Bulky items, Dangerous Goods or deliveries to regional/remote areas may incur an extra freight charge. Our Customer Service team will be in contact if this does occur.
  • Orders to major capital cities except WA generally arrive within 3 to 5 business days, WA delivery times are normally 5 to 10 business days.
  • For further information please refer our Shipping & Delivery page.

365-Day Warranty

  • AutoMegaStore offers a 365-day warranty - 365 days from date of purchase. We will either credit, replace, or refund your item. The warranty covers all manufacturing faults and defects. 
  • For further information please refer our Warranty page.

Item Returns

  • At AutoMegaStore, we want you to be 100% happy with your purchase. If, for any reason, you are not satisfied, you may return the product to us within 30 days of the date of purchase.
  • Email us with your name, order number, and images of the intended returned product, and our Customer
    Care team will arrange authorisation for the return.
  • For further information please refer our Refunds & Returns page.

Goss Chem-I-Weld Stop Leak 325ml is a chemical welding compound designed to:

  • Permanently seal flaws & small cracks in blocks, cylinder heads & other castings
  • Can be effective on iron, aluminium, steel, bronze & brass
  • It is not designed to repair leaks in gaskets, radiators or hoses

Made in Australia

FAQS - Helpful Hints "Chem-i-Weld blocked up my radiator." Chem-i-Weld can ONLY cause restrictions in radiators which have a severe build-up of contaminants in the radiator tubes. The first direction for use on the bottle states: the system MUST BE CLEAN. Flushing the radiator will eliminate this problem, but the radiator must be cleaned before Chem-i-Weld is used again.

The radiator must not be drained and left dry before flushing “ any residual Chem-i-Weld in the system will harden on exposure to air. Boiling the water whilst Chem-i-Weld is being used may block radiator and heater core tubes, and small water galleries in engines.

Directions For Use: Drain and flush the cooling system, including heater. The system must be clean. If the system incorporates a filter or system conditioner, temporarily remove or bypass it. Refill with clean water only.

Leave the system filler cap off, bleed any air out of the system, and run the engine until hotter than normal, but not boiling. This may be done by partially restricting the airflow through the radiator core. Drain sufficient water to add Chem-i-Weld. The water level must be above the radiator core tubes. Do not allow the water to boil.

Shake the Chem-i-Weld bottle well and slowly pour contents into system.

Continue to run the engine at the hotter water temperature with the cap off for approximately 20 minutes. The water level must remain above the radiator core tubes. Do not allow the water to boil. Top up the cooling system and remove the radiator airflow restriction before driving.

Use the vehicle normally until original symptoms are no longer evident. Drain and flush the cooling system, including heater, and fill with clean water. Refit filter/conditioner as necessary. Add corrosion inhibitor, anti-freeze or other additive.


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Flat Rate Shipping*
365-Day Warranty
Easy Returns