---
product_id: 49434147
title: "Holts Speedflush Coolant Flush, Universal Car Radiator Flush, High Performance Coolant Flush For Radiators & Cooling System, Quick & Easy To Use, Prevents Overheating, Suitable For All Cars, 250ml"
brand: "holts"
price: "$20.80"
currency: USD
in_stock: true
reviews_count: 8
url: https://www.desertcart.us/products/49434147-holts-speedflush-coolant-flush-universal-car-radiator-flush-high-performance
store_origin: US
region: United States of America
---

# Universal fit for all engines Quick 10-min flush Prevents costly overheating Holts Speedflush Coolant Flush, Universal Car Radiator Flush, High Performance Coolant Flush For Radiators & Cooling System, Quick & Easy To Use, Prevents Overheating, Suitable For All Cars, 250ml

**Brand:** holts
**Price:** $20.80
**Availability:** ✅ In Stock

## Summary

> 🔥 Keep your engine chill and your ride flawless!

## Quick Answers

- **What is this?** Holts Speedflush Coolant Flush, Universal Car Radiator Flush, High Performance Coolant Flush For Radiators & Cooling System, Quick & Easy To Use, Prevents Overheating, Suitable For All Cars, 250ml by holts
- **How much does it cost?** $20.80 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/49434147-holts-speedflush-coolant-flush-universal-car-radiator-flush-high-performance)

## 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

- • **Trusted Legacy:** Backed by 100+ years of Holts’ automotive expertise for guaranteed reliability
- • **Rapid Radiator Rescue:** Flushes harmful scale & deposits in just minutes for peak cooling performance
- • **Effortless Application:** Simply add, run engine, drain, and refill—no mechanic needed
- • **Cost-Saving Maintenance:** Avoid expensive repairs by extending radiator life and preventing overheating
- • **Universal Compatibility:** Engineered to work seamlessly with all car makes and models—metal & rubber safe

## Overview

Speedflush Coolant Flush by Holts is a high-performance, universal radiator cleaner that quickly removes scale and deposits to prevent overheating. Easy to use in just minutes, it’s compatible with all car engines and helps extend radiator life, saving you costly repairs. Trusted for over a century, Holts delivers professional-grade maintenance in a convenient 250ml bottle.

## Description

Getting the optimal performance out of your car can mean spending vast amounts of money at garages that do not always solve the problems. Sometimes simply cleaning your car’s various systems can have a dramatic performance effect.This Holts speed flush can be used to prevent overheating and clean clogged radiators. The special formulation allows it to clear water channels and is safe for use with metal and rubber hoses. Comes in a 250ml bottle and is safe for use with all types of radiator.Founded in the United Kingdom more than 65 years ago, Holts has become an industry leader in the manufacture and global distribution of automotive aftermarket products.

## Features

- PROFESSIONAL COOLANT FLUSH : Speedflush is the total coolant flush, specially designed to clear your radiator and cooling system quickly. It will flush out harmful scale and deposits to prevent overheating and extend the life of your vehicle.
- UNIVERSAL CAR RADIATOR FLUSH: Holts Speedflush can be used on any engine to clear out scale & debris, ready for filling with antifreeze/coolant. The special formulation allows it to clear water channels and is safe for use with metal & rubber hoses.
- AVOID COSTLY REPAIRS: With the rising cost of car replacement parts, save yourself the money and hassle of taking your car to the garage with Speedflush Radiator Flush. We have used our technical know-how to save you time and money.
- EASY TO USE COOLANT FLUSH: Add the product to the cooling system & run the engine for a few minutes. The product will then circulate through the system & remove any deposits. Wait for the engine to cool, then drain the old coolant & replace it.
- OVER 100 YEARS OF EXCELLENCE: At Holts, we have spent over a century offering solutions to your car troubles to make your life easier and stress free. If you want the perfect tools to maintain, repair or clean your vehicle, we have what you need.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | HOLTS |
| Brand | Holts |
| Model | LOYRK1R |
| Product Dimensions | 4.2 x 7.8 x 14.6 cm; 350 g |
| Item model number | RK1R |
| Manufacturer part number | RK1R |
| Item Weight | 350 g |

## Images

![Holts Speedflush Coolant Flush, Universal Car Radiator Flush, High Performance Coolant Flush For Radiators & Cooling System, Quick & Easy To Use, Prevents Overheating, Suitable For All Cars, 250ml - Image 1](https://m.media-amazon.com/images/I/71iKbbShoiL.jpg)

## Questions & Answers

**Q: Can this be mixed with tap water or is distilled water necessary?**
A: De ionised water is the best bet. Tap water especially hard has minerals that after a while can clog your radiator

**Q: can you mix the speed flush in the system with new coolant for long period**
A: This item is for flushing the system, not for mixing like radweld

**Q: Is it possible to flush out 100% of liquid? if not is it ok to have a small amount of holts cleaner left in the cooling system? thanks!**
A: Hi, how much you get out is dependant on the cooling system design, but you can just keep running water through until it's clear. A small amount left shouldn't affect the new coolant.

**Q: How good is this removing oil from the coolant ?**
A: It’s a waste of money does not work

## Customer Reviews

### ⭐⭐⭐⭐⭐ Effective for coolant flushing
*by R***D on 18 August 2025*

Used to flush the coolant system in a 2014 Audi A3 2.0 TDI. This stuff worked great, as I had a suspected blockage within the heater core. Super effective at removing all the hidden gunk and debris within the system. Before I used this, I had good colour in the coolant. I bought two bottles of this. The first bottle went in with the current fresh coolant, and it pulled out so much gunk which was probably the culprit of the blockages. I drained the system and put in fresh distilled water, along with another bottle of this stuff, and that also again pulled out so much gunk. Finally drained that and put in fresh coolant.The difference between before and after on the heater core is massive. I am usually dubious about additives for cars, but this did as advertised, and very easy to use, as just a pour in application. Good value for money. I would consider buying this every few years to run and use before doing your own coolant replacement as part of preventative maintenance, as the price of this far out weighs any price for a mechanic to tell you the cost of them doing a flush.I used this product over the course of a day, running the car for around an hour each time at full temperature, to have it really work as well. Probably works well as recommended by the manufacturer as well. Will definitely being buying this again and using it again in the future.

### ⭐⭐⭐⭐⭐ Restore cooling components
*by N***1 on 6 August 2025*

Does the job would recommend when you do your coolant flush intervals. For optimum results use with distilled water in the expansion tank only.

### ⭐⭐⭐⭐ Think it works well. Can't hurt if your coolant is ancient.
*by M***N on 16 April 2025*

I didn't have any real blockages but used some of this in a 20-year-old car before I changed the radiator.Lots of crusty bits came out with the coolant - but I had to change it again as another job meant draining coolant (and reusing is just jank!) and more definitely came out again. As it happens, the NEXT time I did this it was basically clean; so I wouldn't worry - maybe do a second flush with only coolant/de-ionised water if you are using this.I can't say for certain but the same car has had heating issues since - only half the vents will blow heat. Probably unrelated as I did flush the heater matrix and nothing came out.

## Frequently Bought Together

- Holts Speedflush Coolant Flush, Universal Car Radiator Flush, High Performance Coolant Flush For Radiators & Cooling System, Quick & Easy To Use, Prevents Overheating, Suitable For All Cars, 250ml
- Holts HAFR0006B Antifreeze Coolant for Car VW-Audi-Seat-Skoda G12, G12+, G12++, G13, G12 EVO 10-year 300k mile long life protection to -30°C, Pink, 5 Litre

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-01-22*