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Oust All Purpose Liquid Descaler - 500ml Stock Number: ES1541155

Oust All Purpose Liquid Descaler - 500ml - ES1541155

4.6 out of 5 Rated 4.6 out of 5 (61 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 - 500ml

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.



  • Water Kettles/Boilers:
  • Fill Kettle half full with water and boil water.
  • Turn off, and add 100-150 ml OUST Descaler to the hot (not boiling) water.
  • Leave in for 30-60 min.
  • Rinse with water, repeat Process whenever necessary.

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 the iron in an empty plastic bowl with the warm plate facing down. Shake gently until the 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 the solution is completely cleaned from iron, briefly iron a spare piece of fabric before you next use the iron on clothes

Coffee Maker:

  • Mix 100ml of OUST Descaler with 200ml of water and pour the mixture into the water tank.
  • Turn the device on and let 50ml of the mixture run through, turn off and wait 15-30 min.
  • Afterwards, let the remaining liquid run through and repeat the process two times with clear water.

Fully Automatic Coffee Machine:

  • Fill the water tank, add 50ml of OUST Descaler to every 1L of water.
  • Start descaling program in accord with the usage instructions.

Toilet Bowls:

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

Taps and Surfaces:

  • Apply OUST Descaler with a wet towel, allow to act for a short time and rinse off with water.
  • In order to intensify the shine, rub dry.
  • Consider the manufacturer’s cleaning and descaling recommendations.

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

To download COSHH details click here

Here’s what other people are saying about Oust All Purpose Liquid Descaler - 500ml.

(61 reviews)

4.6 out of 5

Ease of fitting 3 out of 5
Quality 5 out of 5
Value 5 out of 5
  • Leeds
    5.0 out of 5

    Easy to use, works!

    Bought 6 bottles as it brought the price down and my new kettle seems to get scale in the base very quickly. It is a liquid and really the manufacturer should give a you a little measure to help accurately use the correct amount.

    Ease of fitting 3.0 out of 5
    Quality 5.0 out of 5
    Value 5.0 out of 5
  • Newark
    5.0 out of 5

    Does the job

    I've always been a fan of Oust as I prefer liquid descaler to powder. Even with post and packing, the 500ml bottle worked out at half the price of the pouches the supermarkets sell. I bought two, sorted!

    Ease of fitting 3.0 out of 5
    Quality 5.0 out of 5
    Value 5.0 out of 5
  • Huntingdonshire
    5.0 out of 5

    Always a good purchase

    I have bought this before and always found it very effective so I can recommend it and will continue to purchase it from eSpares for value and service

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

15 Questions and 16 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

is product suitable for steam Ovens most especially Bosh steam Oven HRG656XS2/05

By Lekan - nigeria - 12 September 2019
  • Parminder from eSpares
    Parminder at eSpares says...

    We believe this should be suitable to descale most appliances. We would advise you the check your user manual for more information.

Answer this question
By Barbara Probst - Portsmouth - 21 April 2019
  • eSpares Staff from eSpares
    eSpares Staff at eSpares says...

    This product is a descaler for your kettle and steam iron only.

Answer this question

I have a water softner and although I don't have to descale, the inside of the iron and kettle is brown and the iron bubbles out brown water. Will Oust clean them?

By Patricia - Basingstoke - 06 March 2019
  • eSpares Staff from eSpares
    eSpares Staff at eSpares says...

    This product is a descaler for your kettle and steam iron only.

Answer this question

My Karcher needs descaling but unsure what amount of Oust I need to use.

By Anita - East Midlands - 23 December 2018
  • Parminder from eSpares
    Parminder at eSpares says...

    We would advise to check the manufacturer’s instructions before use, as some manufacturers may not recommend descaling. We would recommend 1 capful of Oust diluted with water, and flushing the appliance with water after use.

Answer this question
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