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Item: 166770

Holts Radweld Plus 250ml


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  • Holts Radweld Plus

    The Holts Radweld Plus is a permanent repair solution for leaks which is easy to use at home as an alternative to garage repairs. It works through your system quickly to seal leaks in; Radiators; Engine blocks; Cylinder heads; Hoses. Read the instructions before use.

    Holts Radweld Plus Extra Info

    • Easy to use, simply pour and go
    • Repairs leaks in minutes
    • No need to drain or flush the system
    • Safe, permanent repair
    • No clogging or damaging effects
    • Suitable for all cars
  • Rated 4.6 out of 5 by 57 reviewers.
    Rated 4 out of 5 by Used to stop gasket leak over belt which was squeaking Not a bad product considering. however I did have to buy three of them until it stopped the leak and almost took three weeks to work..still cheaper than the massive repair 07 March 2016
    Rated 1 out of 5 by Does not work Bought this as a temporary repair for a pin hole in a water pipe until i could get a replacement hose. Followed instructions and it did nothing other than stop my heaters from working! Now need to have system flushed and a new heater matrix. Avoid at all costs, expecting a hefty bill from my mechanic now. 19 December 2015
    Rated 5 out of 5 by Should be kept in every cars boot Very impressive performance on sealing head gasket leak on my old Ford Sierra, which was pressurising the cooling system No nasty side effects either. Always keep some in my boot now , just in case 28 November 2015
    Rated 3 out of 5 by Dose what it says on the box I had a medium leak which could not be traced used this and the leak has gone briliant 02 October 2015
    Rated 5 out of 5 by Magic in a bottle My coolant was leaking due to a radiator fault. This product was recommended by a mechanic as a possible cheap fix. It worked straight away. Where ever the leak was this little liquid found it. Car is running like a dream again. Can't recommended enough. 25 July 2015
    Rated 5 out of 5 by LITTLE WIZARD Radweld is nothing but a wonderful liquid magic. How on earth would I believe this product if I did not use one. I was over the moon two days after using the product. No leakage again with my radiator. My Rover 75 is a new car again. Read the label first before using Radweld products to achieve maximum results. 25 June 2015
    Rated 4 out of 5 by Careful if your on LPG! Used this to stop a small leak to atmosphere between head and block on my 4.7 litre V8 Jeep. Cured the leak within half an hour BUT, mine runs on LPG and like many LPG conversions the vaporiser has its own hot water supply to heat it from the car heater supply. This has a small mesh filter in it. It blocked this pretty much straight away so the car wouldn't switch over onto gas. As an ex mechanic this wasn't a problem took me twenty minutes to fix and cost me nothing but if I hadn't known what I was doing it would have cost a lot for a garage to do it, 08 June 2015
    Rated 2 out of 5 by Blocked my heater matrix I used this on my BMW, as my radiator had a slight leak. This stuff cured the leak, but now my heater is cold, it's blocked my heater matrix, so this "repair" is now going to cost me a lot more. Think carefully before putting this in your cooling system. 01 April 2015
    • 2016-04-22 T06:38:59.161-05:00
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  • You can buy this product from one of our carefully selected Approved Partners. The full list of options available are below. Simply add your chosen option to your basket and proceed to checkout when you're ready.

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    Checkout is always via and all payment will be taken via In checkout the products will be split into separate deliveries for each supplier.

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    Price Seller Info Purchase

Some of the parts we sell here at Halfords have been reconditioned. These will carry a Refundable Deposit or an extra surcharge amount. When you add one of these reconditioned items to your basket, we'll add this extra cost automatically.

Once you've sent us your old item we'll check it over, and then refund you the full surcharge as long as everything is ok.

Before you return your old unit please make sure it's in re-serviceable condition. So if you're returning caliper casings, you'll need to double check they aren't badly damaged or broken. If the part you've sent is found to be unserviceable, we reserve the right not to refund the surcharge.

Please note that if you're returning your old unit to our National Returns Centre then this will be at your own expense.

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Holts Head Gasket & Exhaust Repairs

Holts Radweld Plus 250ml

£7.99 Fix leaks in your car's radiator, engine blocks, cylinder heads or hoses with Radweld Plus.