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

I used Holts Speedflush Coolant Flush on my car’s cooling system and was really impressed with the results. It did a great job of cleaning out old residue and rust from the radiator without causing any leaks or issues. The instructions were clear, and the process was straightforward just mix, run, and flush. After using it, the coolant ran much cleaner and the engine temperature has stayed steady. It’s a great option for regular maintenance or before refilling with new coolant.

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.

Good price for a renowned brand. Could.do.with a bigger bottle.

All good

Good quality product for clearing clogged radiators and cooling hoses in cars, easy to use and quite fast, I always buy 2 as sometimes a repeat application is required on a particularly clogged vehicle cooling system

Good product

Had mayo in my coolant due to head gasket failure. I followed the instructions and it definitely shifted more muck than a water flush alone, but I think it would be better if run in the engine for longer and at higher temperature to shift any oil stuck. But cheap price so I'll probably buy more and give it another flush when I do the oil next.

Works as its meant to work & clears gunk out of system.

Usar antes del SEALit como limpiador.

Usato per lavare il circuito di raffreddamento del mio scooter (del 2004 a cui nessuno prima aveva mai cambiato il liquido) con ottimi risultati. Ha pulito a fondo il radiatore ed i vari tubi e tubetti. E' uscito dal circuito una morchia che non sospettavo dovuta al tempo e al mancato cambio liquido negli anni. Ottimo lavoro

This product is noticeably cheaper than other alternatives but it does the job. Highly recommended for the advertised price.

Ich habe den Kühlerreiniger nach der Anwendung anderer Mittel verwendet, nachdem das Dichtmittel keine Wirkung gezeigt hatte. Während der Reinigung kam viel übelriechender Schmutz aus dem Kühler heraus. Anschließend habe ich den Zylinderkopf abgebaut und festgestellt, dass die Kanäle sauber waren.

Buon prodotto, elimina buona parte della sporcizia senza danneggiare il circuito, rispetto al risciacquo con sola acqua si lega allo sporco e permette di eliminarlo al meglio, forse solo un po' costoso