Holts Speedflush 250ml

By Holts Product code: 51642 Pack size: Each

Product Details

Flushing out harmful scale and deposits will prevent overheating and extend vehicle life.

Over time rust, scale, sludge and deposits can build up on the inside of your engine’s cooling system meaning it doesn’t work efficiently and could lead to blocked channels, and overheating or freezing. Holts Speedflush is a fast acting, easy to use cooling system cleaner which can be used on any engine to clear out scale and debris, ready for filling with coolant/antifreeze. Fast acting cleaner that clears the radiator and cooling system channels.

• Fast acting cleaner for radiators and blocked water channels
• Removes harmful scale and deposits
• Prevents overheating
• Suitable for use with all vehicle cooling systems

Technical Specification
Brand Holts
Manufacturer ID RK1R
Safety Data Sheet click here
Type Radiator Sealant & Treatment
Pack Size 1
Volume (ml) 250
Delivery details

DELIVERY OPTIONS (UK mainland only)

Next Day Delivery – £5.00 or FREE for orders over £25

  • Order before 9pm Monday to Thursday for next business day delivery
  • Order Friday to Sunday before 5pm for Monday delivery
  • Orders placed after Sunday at 5pm will be delivered the following Tuesday
Pre-12pm Delivery – £10.00 to arrive before 12pm on the scheduled days above
Saturday Delivery – £10.00 or £5.00 for orders over £25 & FREE for orders over £75 (order by 6pm Friday)
Sunday delivery – £10.00 or £5.00 for orders over £25 & FREE for orders over £75 (order by 4pm Saturday)
Times may vary for items being delivered directly from the supplier. For more information, please visit our delivery information page below.
Items over 30kg can only be delivered from Monday to Friday. If ordered before 6pm, please allow up to two business days for delivery. Orders placed after 6pm Thursday will be delivered after the weekend.
More about Delivery
Click & Collect details

Collection Details

Our opening times are 7am-8pm Monday-Friday, 7am-6pm Saturday and 9-4pm Sunday. Please check your local store is open on the store locator page, before you visit.

Once you have placed your order online, we’ll have it ready for you at the store you have selected in as little as 5 minutes. We will hold your order for 14 days, after which we will automatically generate a refund to the payment type you used to place the order.

Don’t forget your mobile number – Make sure your mobile number is added so that we can text you when your order is ready to collect. Please wait for your text or email before coming to collect your items.

If an item is eligible for Next Business Day Collection in store, the order must be placed by 9pm Monday to Thursday for collection the next day. Orders placed after 9pm on Thursday, and up to 5pm on Sunday, will be available for collection on Monday. For larger items over 30kg, please allow two business days.

Holts Speedflush 250ml is rated 4.8 out of 5 by 13.
Rated 5 out of 5 by from Coolant change I used this as a flush for my 19 year old 110k mile bmw. I had only owned the car for a year and had no real history for the coolant so thought it best to flush and fill. Lots of detritus came out. Now all nice and clean with new coolant.
Date published: 2023-01-23
Rated 5 out of 5 by from An excellent flushing product A good product especially in older engines. Follow the instructions for flushing through refilling and draining a couple of times as much more rusty deposits come out on further flushing before an anti-freeze refill.
Date published: 2023-01-10
Rated 5 out of 5 by from A quality cleaner I used this to clean my wife's car's heating matrix. It worked very well and helped flushing out gunk that was blocking it. The car is warm again! A great little bottle indeed!
Date published: 2022-12-13
Rated 5 out of 5 by from Mr Miguel Angel Very good product and excellent price thank you
Date published: 2022-11-07
Rated 5 out of 5 by from Does the job! Had a really awful thick brown sludge in the cooling system but this seems to have cleared it and stopped the overheating problem too.
Date published: 2022-05-04
Rated 5 out of 5 by from Life saver Life saver, didn’t think this was as good as it really was, one of these will have its own place on my garage shelf from now on
Date published: 2021-08-02
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