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{"id":9212270510324,"title":"Penrite Radiator Stop Leak – 375mL (ADRSL375)","handle":"penrite-radiator-stop-leak-375ml","description":"\u003cp\u003e\u003cstrong\u003ePenrite Radiator Stop Leak\u003c\/strong\u003e is a fast-acting cooling system treatment designed to seal minor leaks and seepage in radiators, hoses, gaskets, and heater systems. 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Formulated with advanced sealing compounds, it helps restore system integrity without the need for immediate mechanical repairs.\u003c\/p\u003e\n\n\u003cp\u003eSuitable for automotive, light commercial, and stationary engines, it provides quick protection and helps maintain stable operating temperatures.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eSeals minor radiator and cooling system leaks\u003c\/li\u003e\n \u003cli\u003eHelps prevent coolant loss\u003c\/li\u003e\n \u003cli\u003eProtects against rust and corrosion\u003c\/li\u003e\n \u003cli\u003eSafe for hoses, gaskets, and metal components\u003c\/li\u003e\n \u003cli\u003eCompatible with all coolant types\u003c\/li\u003e\n \u003cli\u003eEasy to use—no system disassembly required\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003ePetrol and diesel engines\u003c\/li\u003e\n \u003cli\u003ePassenger vehicles, 4x4s, vans, utes, and light commercial\u003c\/li\u003e\n \u003cli\u003eRadiators, heater cores, and cooling systems with minor leaks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eDirections for Use\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eShake well before use\u003c\/li\u003e\n \u003cli\u003eAdd entire 375mL bottle to the radiator or overflow tank\u003c\/li\u003e\n \u003cli\u003eRun the engine until operating temperature is reached\u003c\/li\u003e\n \u003cli\u003eFor best results, ensure the cooling system is clean prior to application\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003ePackage Size:\u003c\/strong\u003e 375mL\u003cbr\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e ADRSL375\u003c\/p\u003e\n"}
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Penrite Radiator Stop Leak – 375mL (ADRSL375)

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Product Description
Estimated Dispatch 1-2 Business Days
$23.09 $30.00
Maximum quantity available reached.

Penrite Radiator Stop Leak is a fast-acting cooling system treatment designed to seal minor leaks and seepage in radiators, hoses, gaskets, and heater systems. Formulated with advanced sealing compounds, it helps restore system integrity without the need for immediate mechanical repairs.

Suitable for automotive, light commercial, and stationary engines, it provides quick protection and helps maintain stable operating temperatures.

Key Benefits

  • Seals minor radiator and cooling system leaks
  • Helps prevent coolant loss
  • Protects against rust and corrosion
  • Safe for hoses, gaskets, and metal components
  • Compatible with all coolant types
  • Easy to use—no system disassembly required

Suitable For

  • Petrol and diesel engines
  • Passenger vehicles, 4x4s, vans, utes, and light commercial
  • Radiators, heater cores, and cooling systems with minor leaks

Directions for Use

  • Shake well before use
  • Add entire 375mL bottle to the radiator or overflow tank
  • Run the engine until operating temperature is reached
  • For best results, ensure the cooling system is clean prior to application

Package Size: 375mL
Part Number: ADRSL375

Sku: NP-ADRSL375
Vendor: Penrite

Shipping Information

Flat Rate Shipping New Zealand Wide:

  • Urban Delivery: $7.95 for all orders under 30kg
  • Rural Delivery: $10.95 for all orders under 30kg
  • Heavy Items (over 30kg): $19.95 to any Mainstream Depot or non-rural address NZ-wide

We stock thousands of items in-house and utilize a network of suppliers across New Zealand to ensure quick access to a wide range of parts. Orders for in-stock items are typically dispatched on an overnight service nationwide. However, please allow an additional 1-2 days for large or oversized orders due to shipping constraints.

If you need any clarification on shipping times or availability, feel free to contact us!

Please note we do not take liability for the accuracy of photos as we go by part numbers not photos.

Operating Over the Holiday Period

SES Direct will be operating throughout the Christmas and New Year period on a skeleton crew, allowing us to continue processing orders and assisting customers during normal business days.

We are only fully closed on New Zealand Statutory Holidays.

⏰ Early Closures – Christmas Eve & New Year’s Eve

Due to early courier collections, we will be closing earlier than usual on:

  • Christmas Eve – 24 December

  • New Year’s Eve – 31 December

Orders placed after courier cut-off times on these days will be processed on the next working day.

📦 Order Processing & Dispatch

  • Orders are processed on working days only

  • Dispatch continues as normal on non-Stat Days

  • Operating on a skeleton crew may result in slightly longer processing times, particularly during peak days

We appreciate your patience during this busy period.

🏭 Supplier Holiday Closures

Some of our suppliers are closed or operating reduced hours over the holiday period, which may affect availability or lead times for certain items:

  • Briggs & Stratton – Closed until 5 January

  • Oregon – Closed until 5 January

  • Oleo-Mac – Closed until 5 January

  • Makita – Closed on Statutory Holidays only

Orders requiring stock from closed suppliers will be processed once suppliers reopen.

📞 Customer Support Hours

Our support hours remain:
Monday to Friday, 9am – 4pm
(excluding Statutory Holidays)

If we’re unable to respond immediately, please leave your details and we’ll get back to you as soon as possible.

🚚 Courier & Delivery Information

Couriers may experience higher volumes and minor delays during the Christmas period. Once orders have been dispatched, delivery timeframes are subject to courier networks.

Thank You 🎄

Thank you for your understanding and continued support. We wish you a safe and happy Christmas and New Year from the SES Direct team.

Our customer support hours remain Monday to Friday, 9am – 4pm (excluding Statutory Holidays). If we’re unable to respond immediately, please leave your details and we’ll get back to you as soon as possible.

Returns Policy

At SES Direct, our goal is to get your gear up and running as quickly as possible. If you've ordered the wrong part, we’re here to help and will do our best to sort things out for you.

Return Eligibility:

  • Our return policy is valid for 14 working days from the delivery date of your order. Unfortunately, if 14 working days have passed, we cannot offer a refund or exchange.
  • To be eligible for a return, the item must be unused, in the same condition as when you received it, and in its original packaging.
  • Please note we do not take liability for the accuracy of photos as we go by part numbers not photos. 

Return Process:

  • Before returning any item, please contact us to receive a return number, which must accompany your returned goods. This will be supplied via email.
  • Return shipping costs are the customer’s responsibility.
  • Electrical items are only credited at our discretion.
  • A restocking fee of 20% or $15.00 (whichever is greater) applies to common items we stock.
  • For ‘indent’ parts (special orders made just for you), a minimum 25% restocking fee applies.
  • Some specialist or ‘one-off’ items may not be eligible for return if they cannot be sent back to our suppliers.

Freight Credit:
We will only credit freight costs if we sent the incorrect part by mistake.

If you're unsure about a product or need clarification on our returns policy, please contact us before placing your order. We're happy to help! You can reach us at 0800 296 586.