Nulon Radiator Stop Leak (R50) is formulated to effectively seal leaks in radiator and heater cores, weeping cylinder head gaskets and to temporarily repair corroded welsh plugs.

Nulon R50 is formulated with a base of fibre materials. Safe for seals and hoses, has no effect on metals, including aluminium, and is safe to use in all radiators. R50 is compatible with all corrosion inhibitor and all other anti-freeze/anti-boil products.

Note: If the cooling system is dirty or restricted, first clean it with Nulon R40 Radiator Cleaner.

EXERCISE CAUTION when removing radiator cap if engine is hot.

Application Rates

Add 1 bottle for every 10 litres of water or part thereof. To protect cooling systems against corrosion and electrolysis use Nulon R45 Ultra Cool Concentrated Radiator Treatment or one of Nulon's Long Life Coolants.

Caution

Radiator stop leak products should only be used as a temporary repair. You should have a mechanic check and repair the problem at the first available opportunity.

Warning

Often when a cooling system has overheated and boiled, scale and sludge within the system is dislodged and can easily block the core of a radiator that was previously functioning satisfactorily. The sludge and scale can then quite easily cause a blockage in the radiator core when the engine is next operated. Always be aware of this possibility. If such a problem occurs, the best course of action is to have the radiator professionally removed and cleaned.

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If you prefer to pay via bank transfer, please use the details below and include your name or transaction number as your reference.

We'll do our best to ship your item as quickly as possible once payment is received. If you haven't paid within 4 calendar days, your order will be automatically cancelled. If this happens, you won't receive your item and the unpaid item will be recorded on your account.

Thank you for choosing to shop with us. If you have any questions or concerns, please don't hesitate to reach out to us. We're here to help!

At Rolan Australia, we want you to be completely satisfied with your purchase. If for any reason you're not happy with your item, we accept all returns within 30 days of purchase. Please note that we reserve the right to refuse returns if notified later than 30 days from purchase.

To initiate a return, please raise a request through eBay by either sending us a written request via MyMessages or by following the eBay returns process.

When returning an item, please make sure it's in the same condition you received it in and that it's packed properly and protected during delivery. If the item is returned used or damaged, we reserve the right to offer a partial refund.

To ensure that your return is processed quickly, please include a note with the original invoice, your full name, contact number, delivery address, and a brief description of the return reason.

We will process all returns within 3 business days of receiving them, and funds will be processed back to the original payment instrument. If you have any questions or concerns about your return, please don't hesitate to contact us.

If an item is non-returnable, it will be clearly stated in the eBay return policy section for that item. Please note that such items will only be accepted for return if they are found to be faulty or defective.