# Wynn's Radiator Stop Leak Cooling System Sealer 325 ml

**URL:** https://aio.lv/en/product--wynns-wyn55864--12505332
**Data updated:** 2026-06-10 09:36 (EEST)
**Category:** Car Supplies
**Manufacturer:** WYNNS
**Manufacturer code:** WYN55864
**EAN:** 2100510281949
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 6.99 €
**Prices and availability valid until:** 2026-07-28 23:59
**Price without VAT (21%):** 5.78 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--wynns-wyn55864--12505332

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | Friday | free |
| Pickup points | 08.07.2026 | 1.89 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

Wynn's Radiator Stop Leak is a specialized additive designed to seal minor leaks in the cooling system. This 325 ml formula effectively stops and prevents leaks in radiators, water pumps, and heating systems without clogging. It is compatible with all types of antifreeze and coolants, ensuring optimal engine temperature regulation and preventing overheating. Ideal for regular maintenance and emergency repairs of automotive cooling circuits.

## Long description

Wynn's Radiator Stop Leak is a professional-grade additive formulated to seal minor leaks within automotive cooling systems. This 325 ml treatment is engineered to identify and plug small fissures in radiators, water pumps, and heating circuits, ensuring the integrity of the cooling loop. By maintaining a sealed system, it helps prevent coolant loss and protects the engine from overheating, which is essential for long-term vehicle reliability.
Advantages
The primary benefit of this formula is its ability to provide a reliable seal without the risk of clogging critical components like narrow radiator channels or heater cores. It is fully compatible with all standard antifreeze and coolant types, making it a versatile solution for various vehicle makes and models. The additive is designed to remain stable under high operating temperatures and pressures, providing a durable repair that helps maintain optimal engine thermal management.
Suitable for
Sealing minor leaks in automotive radiators
Repairing small fissures in water pumps
Addressing leaks in vehicle heating systems
Preventive maintenance for cooling circuits
This product is not intended for repairing large cracks, burst hoses, or significant structural damage to the cooling system. If the leak is substantial or if the cooling system is heavily contaminated with debris, mechanical repair or component replacement is necessary rather than using a chemical sealant.
Key specifications
Volume: 325 ml
Compatibility: All antifreeze and coolants
Application: Cooling system leak repair
Formulation: Non-clogging liquid
To use this product, ensure the engine is cool before opening the radiator cap or expansion tank. Shake the bottle well and pour the entire contents into the cooling system. Start the engine and allow it to run at operating temperature for approximately 10 to 15 minutes to ensure the additive circulates thoroughly and seals the leak points. Check the coolant level after the engine has cooled down and top up if necessary.
What to consider before purchase
Verify that the leak is minor and not caused by a burst hose
Check the total capacity of your cooling system
Ensure the cooling system is not already clogged with scale or rust
For best results, use Wynn's Radiator Stop Leak as a preventive measure or for immediate minor leak repair. Always monitor your engine temperature gauge closely after application to ensure the cooling system is functioning correctly.

## FAQ

### How much does the Wynn's Radiator Stop Leak 325 ml Cooling System Sealer cost, and is it available for purchase?

The price is 6.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 204 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on Friday at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All WYNNS products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized WYNNS service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12505332/68846161_large.webp