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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"}

Penrite Radiator Stop Leak – 375mL (ADRSL375)

Product Description
Usually Ships Within 1 Business Day
$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

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.

🐣 Easter Trading Hours Update 🐰

Please note our Easter weekend schedule:

Closed:
Friday 3rd April (Good Friday)
Monday 7thApril (Easter Monday)

Tuesday 3rd April – Southland Anniversary Day:
While it’s a public holiday in our region, we’ll be open with a skeleton crew order processing.
Please note: Courier services will be unavailable, so dispatch will be limited.

We’ll be working behind the scenes to get your orders prepped and ready to go first thing Wednesday 8th April when full operations resume.

Thanks for your understanding and have a great Easter!