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Oust All Purpose Liquid Descaler - 250ml Stock Number: ES1541155

Oust All Purpose Liquid Descaler - 250ml - ES1541155

4.5 out of 5 Rated 4.5 out of 5(35 customers)

Rapid action descaler ideal for kettles, coffee machines and steam irons

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Manufactured by Oust

(This part fits select models)

Will this part fit my Appliance?

This product is compatible with:

  • Coffee Machines
  • 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.

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.



  • 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.
  • Suitable for all types of kettle including plastic


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:

  • 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


eSpares stocks a wide range of kettle filters to insure your kettle is performing at its best every time. Click here to view our range of kettle filters.


To download COSHH details click here

Write a review

Here’s what other people are saying about Oust All Purpose Liquid Descaler - 250ml.

(35 reviews)

4.5 out of 5

Ease of fitting 2 out of 5
Quality 3 out of 5
Value 3 out of 5
  • Dorset
    4.0 out of 5

    Seems to be a quality product

    I bought this to clean my steam iron. I had to do it twice but the iron now works well.

    Ease of fitting 1.0 out of 5
    Quality 4.0 out of 5
    Value 4.0 out of 5
  • 1.0 out of 5

    Not good with heavy scale

    I bought this product in the hope of removing the lime scale in my Kettle, i followed the instructions to the letter, but it did not remove much, so I emptied the kettle and did it again this time adding 5 cap fulls still not removing all the lime scale, it maybe the hard water area I live in, it may be the time I have used the kettle before attempting descaling, but it does not work for me so very disappointed with the product

    Ease of fitting 2.0 out of 5
    Quality 2.0 out of 5
    Value 1.0 out of 5
  • Nottingham
    4.0 out of 5

    Oust descaler

    I purchased these bottles of descaler because you get more for your money than buying the satchets.

    Ease of fitting 4.0 out of 5
    Quality 5.0 out of 5
    Value 5.0 out of 5
See all reviews
Ask a Question

8 Questions and 10 Answers

By Anonymous - Shropshire - 11 January 2012
  • Chris from eSpares
    Chris at eSpares says...

    A better solution for cleaning showers may be Stock Number: ES1640011

  • Limescale remover spray from a supermarket. Own brand is likely to be cheaper. For mild "clouding", white vinegar will work well. By Janet - Uxbridge - 07 February 2016
  • 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
  • Caitlin from eSpares
    Caitlin at eSpares says...

    Unfortunately we don't list any bathroom cleaning products.

Answer this question
By BKC - sherborne dorset - 13 September 2016
  • Chris from eSpares
    Chris at eSpares says...

    This product is suitable for all types of kettle including plastic.

Answer this question
By dh - hertfordshire - 19 November 2015
  • Chris from eSpares
    Chris at eSpares says...

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

Answer this question

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
  • Chris from eSpares
    Chris at eSpares says...

    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.

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ie how long will a bottle last?

By Alan - - 09 May 2015
  • Chris from eSpares
    Chris at eSpares says...

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

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