High Strength Alkaline Drain Cleaner



Product description

Unlock-A-Block: Ideal for removing blockages or for regular use

Pack Sizes

  • 1L

Product specification

Unlock-A-Block is a highly concentrated blend of sodium and potassium hydroxides specifically designed to attack various materials that create blockages commonly caused by hair, grease, fat, oils, etc.

This unique formulation is heavier than water and is designed to bind the active chemical ingredients together, allowing them to sink through other liquids to the source of the problem with minimum loss of activity, even deep within drainage systems! The formula will even remain stable at high temperatures.

Unlock-A-Block is supplied as a full strength, heavy duty, industrial formulation, which makes it suitable for both the treatment of problem drains or for regular dosing as a preventative maintenance procedure. Unlock-A-Block is 100% water soluble and mixes with hard or soft water without issue.

Unlock-A-Block’s unique formulation makes it ideal for use in many environments including food factories, restaurants, prisons, stables, food processing & meat packing plants, dairies, hotels, bakers, butchers, commercial, municipal and industrial facilities, etc.
Unlock-A-Block can be used in all types of drains and grease traps to reduce foul odours and to kill a wide range of bacteria and fungi. Dosing regularly can ensure a free-flowing system all year round.

Directions for use:

Remove as much water as possible from the sink, drain or toilet to be treated. Pour SLOWLY and directly into the drain or pipe. Sinks and small drains: use 200/350ml. Allow to stand for 30 minutes then flush with hot water. Toilet and floor drains: use 350/600ml. Allow to stand for 30 minutes then flush with hot water not boiling! Repeat as necessary to restore original drainage. If the blockage persists, seek professional help in disassembling pipe work making sure that all persons are aware of strong alkali presence and the implications for health and safety. Obtain a copy of Material Safety Data Sheet and read it thoroughly before commencing. Preventative use: apply a small quantity (200ml) at regular intervals in drains susceptible to blockage. SPILLAGE: Small quantities represent little problem and may be flushed with large volumes of water. For larger quantities contain with solid absorbent or sand.


DO NOT Mix with acids, chemicals or other cleaning agents as a violent reaction can occur. Never stand over the drain when applying UNLOCK A BLOCK. Do not breathe any vapours which may be created. Allow adequate ventilation. Do not use on aluminium, aluminium alloys or zinc galvanised steel. Keep the container’s cap closed and secure at all times when not in use. Avoid splashes onto decorative surfaces as discolouration may occur. A plastic funnel may be useful for dispensing but the other end should be clear of the blockage to prevent blow-back. Under NO circumstances should acid of any type be used to neutralise unwanted UNLOCK A BLOCK. Wear suitable chemical resistant protective equipment: gloves, goggles, plastic overalls etc. If unsure, always contact the manufacturer.

Features and Benefits

Powerful blend of sodium hydroxide & potassium hydroxide.
Specifically designed to attack soaps, greases & fats.
Unblocks drains fast.


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