# Radiator Sealant STP 300 ml bottle — STP Kølertætner 300 ml

**URL:** https://aio.lv/en/product--stp-2511--11872433
**Data updated:** 2026-03-09 20:36 (EET)
**Category:** Car Body Care
**Manufacturer:** STP
**Manufacturer code:** 2511
**EAN:** 5020144808213
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 33.99 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 28.09 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--stp-2511--11872433

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.07.2026 | free |
| Pickup points | 16.07.2026 | 1.99 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

STP Kølertætner is a 300 ml radiator sealant for automotive cooling systems. The ready-to-use liquid is designed to seal small leaks and porosities in radiators, heater cores and cooling system hoses without disassembly. Suitable for petrol and diesel engines, it helps prevent coolant loss and overheating during temporary repairs and maintenance.

## Long description

STP Kølertætner 300 ml is a ready-to-use radiator sealant formulated for automotive cooling systems. The liquid product is intended to seal small leaks, hairline cracks and porosities in radiators, heater cores and cooling system hoses without the need to disassemble components. Compatible with both petrol and diesel engines, this 300 ml bottle provides a compact solution for temporary sealing to reduce coolant loss and lower the risk of overheating while driving or during short-term repairs.
Advantages
The product is packaged in a 300 ml bottle for convenient handling and dosing. Its ready-to-use composition allows direct addition to the cooling system, eliminating preparation time. The sealant works on multiple cooling system elements including radiators, heater cores and some hoses, making it versatile for emergency and maintenance use. It is formulated for use in typical automotive cooling systems and designed to act quickly to reduce coolant leakage and associated temperature rise.
Suitable for
Sealing small leaks in radiators and heater cores
Temporary repair of porous cooling system hoses
Use in petrol and diesel passenger cars
Short-term prevention of coolant loss and overheating
Key specifications
Volume: 300 ml
Form: ready-to-use liquid
Application: automotive cooling systems (radiator, heater core, hoses)
Compatibility: petrol and diesel engines
Function: seals small leaks and porosities without disassembly
How to use
Ensure the engine is cool before opening the cooling system. Shake the bottle if indicated on the label and add the specified amount of sealant directly into the radiator or expansion tank according to the vehicle manufacturer’s instructions or the product label. Start the engine and allow it to reach normal operating temperature so the sealant can circulate and reach the leak. Monitor coolant level and temperature after application and top up with the appropriate coolant if necessary. For persistent or large leaks, consult a professional repair service.
Usage recommendations
Use as a temporary repair measure only; the product is intended to prevent coolant loss and overheating until permanent repair or replacement of damaged cooling system components can be performed. Follow vehicle manufacturer guidance regarding coolant type and maintenance intervals. Avoid overfilling and ensure proper disposal of any unused product or empty containers in accordance with local regulations.

## FAQ

### How much does the STP radiator sealant Kølertætner 300 ml cost, and is it available for purchase?

The price is 33.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 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 13.07.2026 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 STP 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 STP 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/11872433/67287299_large.webp