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Würth Radiator Sealant HP

Würth Radiator Sealant HP

In stock

Key Features

  • High-performance cooling system protection for all modern vehicles with crossflow cooling systems.
  • Seals micro-leaks up to 0.1mm in cylinder head gaskets, hose connections, and cooling system units.
  • Safe for the system - does not impair dirt strainers or restrict coolant flow.
  • Microfine synthetic sealing particles ensure precise and lasting sealing without clogging.
  • Suitable for preventative use whenever antifreeze is changed.
  • One 150ml can treats up to 10 litres of coolant.
DETAILED DESCRIPTION →
£17.99 GBP
£17.99 GBP
Sale Sold out
Taxes included. Shipping calculated at checkout.

Shipping Information

What Are My Shipping Options?

In-Store Pickup

In-Store pickup is available on all purchase. Pickups are available Monday - Friday between the hours of 9:00–17:00. 

An email confirmation will be sent when your order is ready for collection. 

Free Shipping

We offer free Standard (2-3 Days) shipping on orders within the United Kingdom on orders over £100. Please note, some large items that require specialist courier companies, such as large mirrors and palleted items are excluded from this deal.

Shipping Fees

We also offer shipping at the following rates:

Standard-Size Parcel

Standard (UK Only) - 2-3 Days - £2.99

Express (UK Only) - 1-2 Days - £4.99

International (EU) - 3-7 Days - £14.99

International (ROW) - 5-10+ Days -£23.99


Large Parcel

Standard (UK Only) - 2-3 Days - £2.99

Express (UK Only) - 1-2 Days - £4.99

International (EU) - 3-7 Days - £14.99

International (ROW) - 5-10+ Days - £69.99

Most UK orders will be sent using Royal Mail, with larger items being sent with DPD.

International orders within the EU will normally be dispatched with Royal Mail, DPD, or UPS.

International orders to the rest of the world will normally be sent with DPD or UPS.

Please note, international delivery charges are very volatile and subject to change. We will do everything in our power to honour the delivery fee, however, in some cases, shipping may increase in price. In this event, you will be given the offer to pay the difference or cancel the order and receive a full refund.

Please note, we may be subject to various rules and restrictions in relation to some international deliveries, and you may be subject to additional taxes and duties over which we have no control. If such cases apply, you are responsible for complying with the laws applicable to the country where you live and will be responsible for any such additional costs or taxes.

Dispatch Times

Orders placed before 15:00 Monday - Friday will be shipped on the same day. 

Orders placed after this time will be shipped on the following business day,

Please note, we are closed at weekends, as well as English Bank Holidays.

Returns Policy

Our refund policy can be found at the following address: https://esupplyline.com/policies/refund-policy.

Further Information

You can contact us for further information on our shipping policies using the following:

Phone: 01953 711 881

Email: sales@esupplyline.com

Live Chat: Available on our website, Monday - Friday, 8:30 - 17:00.

Contact Form: https://esupplyline.com/pages/contact

View full details

Description

Effective Leak Protection for Cooling Systems

Würth Radiator Sealant HP is a water-based cooling system additive formulated with microfine synthetic sealing particles that circulate with the coolant and lodge precisely at leakage points. It provides a reliable seal for hairline cracks, evaporation losses, and minor leaks in cylinder head gaskets, hoses, and other cooling system components.

Safe and Compatible

Unlike traditional sealants, the advanced formula does not impair dirt strainers, thermostats, or radiator channels, ensuring the cooling system continues to operate efficiently. It is compatible with all modern coolants and antifreeze formulations used in crossflow cooling systems.

Preventative and Corrective Use

The sealant can be added preventively during coolant replacement to safeguard against future leaks, or curatively to stop existing micro-leaks. This helps avoid overheating, coolant loss, and potential engine damage while extending the service life of the cooling system.

More Information

Application Instructions

  1. Ensure the engine is warm before application.
  2. Shake the can well and add the entire contents (150ml) directly to the cooling circuit. Only add to the expansion tank if coolant flows through it.
  3. Run the engine for at least 10 minutes, allowing the thermostat to open and heat to circulate through the system.
  4. Switch off the engine, check the coolant level, and top up if necessary.

Usage Notes

  • One can treats up to 10 litres of coolant.
  • Use preventively whenever antifreeze is changed.
  • Designed for sealing micro-leaks up to 0.1mm - not suitable for large cracks or severe system damage.

Specifications

Chemical Basis: Water with synthetic sealing particles

Colour: Blue

Fragrance: Characteristic

Contents: 150 ml

Density: 1.01 g/cm³ (at 20 °C)

pH Value: 9

Shelf Life: 12 months from production (store sealed, cool, and dry)