---
product_id: 49435076
title: "Holts Radweld Plus Coolant Leak Repair, Total Coolant Leak Repair, Industry Leading Car Radiator Leak Sealant, Easy To Use, Seal Engine Block, Cylinder Head, Hoses & More, Suitable For All Cars, 250ml"
brand: "holts"
price: "€ 29.27"
currency: EUR
in_stock: true
reviews_count: 13
category: "Holts"
url: https://www.desertcart.gr/products/49435076-holts-radweld-plus-coolant-leak-repair-total-coolant-leak-repair
store_origin: GR
region: Greece
---

# Universal fit for all cars Quick 30-min activation Total cooling system leak repair Holts Radweld Plus Coolant Leak Repair, Total Coolant Leak Repair, Industry Leading Car Radiator Leak Sealant, Easy To Use, Seal Engine Block, Cylinder Head, Hoses & More, Suitable For All Cars, 250ml

**Brand:** holts
**Price:** € 29.27
**Availability:** ✅ In Stock

## Summary

> 🚗💨 Seal leaks fast, drive worry-free!

## Quick Answers

- **What is this?** Holts Radweld Plus Coolant Leak Repair, Total Coolant Leak Repair, Industry Leading Car Radiator Leak Sealant, Easy To Use, Seal Engine Block, Cylinder Head, Hoses & More, Suitable For All Cars, 250ml by holts
- **How much does it cost?** € 29.27 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/49435076-holts-radweld-plus-coolant-leak-repair-total-coolant-leak-repair)

## Best For

- holts enthusiasts

## Why This Product

- Trusted holts brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Fast-Acting Formula:** Starts working within 30 minutes to stop coolant loss.
- • **Trusted by Thousands:** 4.4-star rating from over 2,400 satisfied users.
- • **Comprehensive Coverage:** Seals leaks in engine blocks, cylinder heads, hoses, and more.
- • **Effortless Leak Sealing:** Just pour in and drive—no flushing or draining needed.
- • **Garage-Grade Reliability:** Industry-leading sealant that saves costly repairs.

## Overview

Holts Radweld Plus is a 250ml advanced coolant leak repair sealant designed for all car types. It quickly and effectively seals leaks in engine blocks, cylinder heads, hoses, and other cooling system components without the need to flush or drain. Easy to use and highly rated, it activates within 30 minutes to prevent coolant loss and costly garage visits.

## Description

Product Description Radweld Plus is an easy to use, total cooling system leak repair. It works through your system to quickly seal leaks in: engine blocks, cylinder heads, hoses, heater core, water pump gaskets. Radweld Plus can be used at home and is simple to use; there’s no need to flush or drain the system. Simply pour in and let Radweld Plus locate and seal the leaks. Safety Warning Follow instructions; keep out of reach of children

Review: It certainly works! - It seems to work wonders! I've waited a month to see if it actually holds and I have to say I am very pleased. My car developed a serious coolant leak where a metal pipe bursted and everything leaked out within minutes. After fixing this, what I thought was the only leak, the coolant kept slowly disappearing still. I bought this, hoping to avoid visit to the garage after reading the reviews and doing a little research. Extremely easy to use, just pour into the coolant tank and leave the car running for 30 minutes. Month later, coolant still at the same level!! Fantastic, easy to use and and absolute bargain too...
Review: Excellent - Outstanding result, no leak from the first use, very effective product. If you use it and still experience leakage, seek garage advice.

## Features

- Suspected of damaging fertility or the unborn child.
- Radweld Plus 250Ml
- Great Product

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004EP8JS2 |
| Best Sellers Rank | 265 in Automotive ( See Top 100 in Automotive ) 2 in Fillers, Adhesives & Sealants |
| Brand | Holts |
| Customer Reviews | 4.4 4.4 out of 5 stars (2,437) |
| Date First Available | 2 Dec. 2010 |
| Item Weight | 280 g |
| Item model number | RW2GA |
| Manufacturer | Holts |
| Manufacturer part number | RW2RGA |
| Model | Radweld Plus |
| Product Dimensions | 7.6 x 14.2 x 3.2 cm; 280.66 g |

## Images

![Holts Radweld Plus Coolant Leak Repair, Total Coolant Leak Repair, Industry Leading Car Radiator Leak Sealant, Easy To Use, Seal Engine Block, Cylinder Head, Hoses & More, Suitable For All Cars, 250ml - Image 1](https://m.media-amazon.com/images/I/818sp9gk8QL.jpg)

## Questions & Answers

**Q: Is it fine to pour this into an empty radiator and then add the coolant and water, and then run the engine with the heater on?**
A: You are supposed to pour it into a hot radiator after the engine has been running for at least 10-15 minutes, I ran it for 20 minutes. I have seen a lot of negative reviews for this item and most of the people were not following the instructions. It’s up to you but I would pour it into a radiator that has water and is hot. Hope this helps.

**Q: I drive a Vauxhall Astra where do I put this product in the engine or in the coolant**
A: Shake the product well and add to the coolant do not put it into the engine

**Q: Iam getting water around my spark plugs will this seal the plugs**
A: Hi Steven - clearly, you ought not to be getting water around spark plugs!! I just am curious as to how the water arrived there, as it does not sound like an engine coolant leak, so my answer would be no, in this case. It is something that requires looking at, obviously - and by a mechanic, since there may be a way for this to occur. I have never encountered it - the closest was having the plugs bathing in an oil bath, for some reason - we never did figure out exactly why - but water?? My apologies, I cannot assist further - I would be hot-foot to my SAAB people, tho' I might have a look around first to see if there is another source for that troublesome fluid!! That's is all I can say. Good luck - Ross.

**Q: What is the quantity in the plastic container?**
A: If you read the info sheet it tells you 250ml

## Customer Reviews

### ⭐⭐⭐⭐⭐ It certainly works!
*by M***S on 29 August 2025*

It seems to work wonders! I've waited a month to see if it actually holds and I have to say I am very pleased. My car developed a serious coolant leak where a metal pipe bursted and everything leaked out within minutes. After fixing this, what I thought was the only leak, the coolant kept slowly disappearing still. I bought this, hoping to avoid visit to the garage after reading the reviews and doing a little research. Extremely easy to use, just pour into the coolant tank and leave the car running for 30 minutes. Month later, coolant still at the same level!! Fantastic, easy to use and and absolute bargain too...

### ⭐⭐⭐⭐⭐ Excellent
*by W***T on 21 October 2025*

Outstanding result, no leak from the first use, very effective product. If you use it and still experience leakage, seek garage advice.

### ⭐⭐⭐⭐ Pin hole leak in overflow tank, sorted!.
*by A***S on 20 January 2020*

Had a pin hole leak in my overflow tank so thought I would give this a try before replacing it. Followed the instructions on the back ( used half the bottle ) and let the car get to temp for 30 mins. Set off to work (20 miles) and no leak! TBH even with all the good reviews I still had my suspicions, but 1month later it’s still doing brill!. Only reason for 4 stars is how well it’s works long term. Will update!.

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-01-25*