Oust All Purpose Liquid Descaler - 250ml

Stock Number: ES1541155

Manufactured by Oust

(This part fits select models)

In Stock Available for immediate despatch

Rated 4.6 out of 5 (22 customers)

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Will this part fit my appliance?

This product is compatible with:

  • Coffee Makers
  • Irons
  • Kettles


Oust All Purpose Liquid Descaler - 250ml

Extend the lifespan of your appliances - stop limescale build-up in its tracks! Oust All Purpose Liquid Descaler is ideal to restore your kettle, coffee maker and steam iron - especially if you live in a hard water area. Its rapid action formula removes limescale in just 10 minutes, and keeps your small appliances functioning at their best.

Kettle Instructions:

  • Half fill kettle with water and boil, before unplugging and placing in an empty sink. Add 3 capfuls of Oust and leave for 10 minutes.
  • If any scale remains, reheat solution until it fizzes (but DO NOT boil)
  • Pour solution away: rinse kettle with cold water, boil again with clean water and then rinse once more.

Steam Irons:

Check manufacturer’s instructions before use, as some manufacturers may not recommend descaling.

  • Heat iron until it is hand hot and then unplug (make sure iron is switched OFF during descaling). Add 1 capful of Oust to a jug of water and pour into iron’s water chamber. Top up with water and set to steam position (but DO NOT turn iron back on).
  • Place iron in an empty plastic bowl with the warm plate facing down. Shake gently until solution starts to drain through steam holes. Leave for 10 minutes (or until empty). If iron has a spray button, briefly pump any remaining solution through.
  • Rinse thoroughly with cold water, drain and dry. To ensure solution is completely cleaned from iron, briefly iron a spare piece of fabric before you next use the iron on clothes.

Coffee Maker Instructions:

  • Half fill water reservoir with water and add 3 capfuls of Oust.
  • Switch machine on and allow about half of the solution to filter through before switching off.
  • After 10 minutes, switch machine on to filter through remainder of solution, then empty down sink before running the machine through twice with clean water.

Toilet Bowls:

  • Squirt Oust under rim of bowl and leave for a few minutes before flushing.



  • Capacity: 250ml
  • Recommended by Morphy Richards, Siemens, Russell Hobbs and Prestige
  • Superfast action - removes limescale in 10 minutes
  • Limescale doesn't just look unpleasant - it can shorten the life of appliances too
  • Oust multi-purpose descaler is formulated to work quickly and easily to restore most small household appliances to their best in just 10 minutes
  • This bottle format can be used on kettles, coffee and cappuccino machines and steam irons - it's also ideal for keeping toilet bowls pristine


Product Reviews

Rated 4.6 out of 5 (22 customers)
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    • 5.0 out of 5
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    By - Warrington

    I always use this to clean my Tassimo coffee machine. It does a good job quickly and cheaply
  • Does the job to perfection

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    By - Mervent France

    I live in a hard water area and this descaler has cleared all lime residue in my kettle and coffee percolators.
  • Does the job well

    • 5.0 out of 5
    • 5.0 out of 5
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    • 5.0 out of 5

    By - Skegness UK

    Excellent product no fuss, no mess,no smell,very quick and easy to use.

Ask & Answer

(7 Questions and 7 Answers) Ask a question
  • Q limescale on shower cubicle glass do you have anything to remove it 2 Answers

    By Anonymous - Shropshire - 11 January 2012

    • A
      Try a small steam cleaner with the glass protector head in place. Lifts most stuff in a kitchen and from taps

      By ben - 21 July 2013

    • A

      Unfortunately we don't list any bathroom cleaning products.

      By Caitlin eSpares Staff - 13 January 2012

  • Q on the steam cleaner page you recomend this product to descale a steam cleaner - is it really suitable for this task 1 Answer

    By dh - hertfordshire - 19 November 2015

    • A
      This product should be suitable for steam cleaners but remember to empty and flush after with clean water.

      By Chris eSpares Staff - 23 November 2015

  • Q Can it be used in a Loo Cistern? 1 Answer

    I have a push button Cistern flusher on top of the cistern and the plastic water filling gadgets inside the cistern have clogged up with Limescale leading to the valves not closing tight and the cistern overfilling. a) can this be used in cold water or would it need hot? b) is this product suitable or should I use something else? I'm no plumber although I don't mind taking things apart to clean them, trouble is anything I touch attached to water seems to end up flooding somewhere so some kind of cleaner which doesn't require dismantling the contents of the cistern is preferable. Thanks

    By Andrew - London - 01 August 2015

    • A
      If there is limescale in the valve unit if you dismantle and place the parts in a container of hot water with this it should help remove it. However the usual cause of a leaking ball cock is the seal perishing and becoming hard.

      By Chris eSpares Staff - 03 August 2015

  • Q A bottle contains 250 ml, but how much is needed for each de-scale on average? 1 Answer

    ie how long will a bottle last?

    By Alan - 09 May 2015

    • A
      3 Capfulls (30 ml?) for a kettle or coffee maker (8 treatments?) 1 capful for an iron (giving 25 treatments?).

      By Chris eSpares Staff - 11 May 2015

  • Q i have bosh jet steam iron sensixx b625l , it stop generating steam . 1 Answer

    i have tried to unscrew boiler drainage plug located on the bottom of the appliance but its will not unscrew any tips to unscrew plug will be well come. secondly would any liquid help to unblock if there is any dirt or so to get the steam going.

    By gondal - bradford w.yorks - 09 March 2014

    • A
      The problem is likely to be due to a build up of limescale if in a hard water area. Use the descaler in the appliance to break up limescale. Drain the water out and fill with fluid allowing it to stand before flushing through. Try using water pump pliers to remove the drain plug.

      By Chris eSpares Staff - 10 March 2014