Caustic Soda Pearl Sodium Hydroxide Lye 5kg

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Caustic Soda

  • Sodium Hydroxide >99%
  • Other names: Caustic Soda, Sodium Hydroxide, Lye.

Home Uses:

  • Cleaning and unblocking drains.
  • Cleaning the limescale off toilets below the waterline.
  • Can be used as a paint stripper. Outdoor use only.
  • Used to make soap. Please do further research into the appropriate directions.
  • Decking cleaner.

Warning: Caustic Soda is highly corrosive please read safety instructions and take all pre-cautions and use appropriate safety equipment. Do not touch direct to skin as it will burn skin within seconds.

Available Sizes: 5kg and 20kg

*All information provided is a recommendation. We cannot guarantee the uses as each application has various characteristics and therefore we cannot be certain it will work for you*  

Warning: Corrosive. Risk of serious damage to eyes. Causes severe burns. Avoid contact with skin and eyes. Wear suitable gloves and eye/face protection. may give off harmful gases if mixed with other

Treat as corrosive material. For more details refer to MSDS.

Information Regarding Pick Up

Can I pick it up?

Yes, we are located in Penrith. Unit 3, 10 Production Place Jamisontown NSW 2750.

Are we open to the public? 

Yes, we are. You can buy direct from us by paying card or cash. You don't need to be a business customer to buy. Anyone can walk in and buy from us.

We are open from 7:30 am to 4:30 pm Monday to Friday.

What can you pay on pick up?

We accept cash or card (Visa, MasterCard, AMEX, EFTPOS). 


Information Regarding Pick Up Of 200LTRS

200LTRS can be picked up as long as they are stowed and restrained within rigid sides or gates; and no dangerous article or package containing dangerous goods may protrude above the sides or gates by more than 30% of the height of the article or package; and no parts of an article or package may protrude horizontally beyond the sides or gates.


Information Regarding Delivery

We know you’ll be keen to receive your order as quickly as possible. Please make sure you provide us with:

  • A valid delivery address (either residential or business) as we cannot ship our products to PO Box or Parcel Collect, and
  • Contact phone number so we can contact you if there are any issues with your consignment.

Our couriers require the customer’s phone number for each delivery. We can’t book your delivery unless you have provided us with a valid daytime phone number.

We pack every order carefully to ensure it reaches you in good condition.

Your order will be sent through one of our preferred couriers.

After payment has been received, your order will be processed by the following business day. The approximate cut-off time for same-day dispatch is 11 am.

Shipping timeframes:

NSW, ACT 1 to 3 business days
QLD 2 to 5 business days
VIC 2 to 5 business days
SA, WA, TAS,  3 to 6 business days

Shipping charges are calculated depending on the quantity, weight, location and if it contains dangerous goods. 


All consignments are tracked. The tracking number can be viewed in the email notification you receive after the order has been dispatched.  If you can't find it or need help with tracking, don't hesitate to get in touch with us.

If you have any questions about delivery, please contact us and we will do our best to ensure you’re happy.

Below are commonly asked questions. All answers provided are merely recommendations. Please do further research and test yourself. If you have any questions please feel free to ask.

Can caustic soda be used for soap making?

Yes, our caustic soda is used for soap making.

Caustic soda is better when making solid soaps whereas potassium hydroxide is better for making liquid. This is based from customer feedback, you will need to do your own testing to validate this information.

Do you sell caustic soda food grade?

Our Caustic Soda is not safe to use in food processing. We do not sell food grade caustic soda products but you may be able to find it somewhere else.

Painted Sandstone

By: on 15 June 2019
Applying a small amount at a time and washing off with running tap water , i was able to remove old paint from sandstone . Eye protection and rubber gloves must be worn for safety .

Caustic Soda Pearl Sodium Hydroxide 5kg

By: on 10 November 2018
Excellent product for my purpose of unclogging a major drain pipe, cleared the blockage with 2 x 500gm applications within 2 hours. The product is well saftey packaged, and good value for the price. Ordered online and delivered from NSW to VIC promptly. Thank you for your good service, can highly recommend.

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