Product Guides / Sulphuric Acid Drain Cleaner · shop specialist cleaning
Sulphuric Acid Drain Cleaner, full industrial strength
Concentrated sulphuric acid · 1L

Sulphuric Acid Drain Cleaner

Outdoor drain & toilet unblocker — trade use only
Highly corrosivesevere burns risk
Acid to waternever reverse the order
Outdoor drains onlynot for septic tanks

Sulphuric Acid Drain Cleaner is a highly concentrated acid formulation (typically 90%+ sulphuric acid) for rapidly clearing stubborn blockages in outdoor drains, pipes and toilets. It's a serious hazard if handled carelessly — read this guide fully before use, and only use it if you're trained and equipped to do so safely.

Before you start — this one matters

How to use it

Used neat, in small amounts, poured slowly and carefully.

Clearing a blocked outdoor drain, pipe or toilet

  1. Put on full PPE — chemical-resistant gloves, eye/face protection and protective clothing.
  2. Ensure the area is well ventilated and clear of people and pets.
  3. Pour a small amount of the product slowly and directly into the blocked drain, pipe or toilet — do not rush this step.
  4. Leave for 10–15 minutes to dissolve the blockage.
  5. Flush thoroughly with plenty of cold water.
  6. Repeat only if necessary, and never exceed the amount needed to clear the blockage.

Product details

Format1L
CompositionConcentrated sulphuric acid with corrosion inhibitor
ClassificationCorrosive — regulated explosives precursor product

Suitable for: outdoor drains, pipes and toilets with plastic plumbing. Not for septic tanks or metal pipework.

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