Alum Block - A Guide On How And Why To Use

Alum Block - A Guide On How And Why To Use

An Alum Block, also known as an Alum Stone or Alum Crystal, is a crystal-like stone that is moistened with water and gently rubbed over the shaved area to act as an antiseptic and to combat a number of post-shaving related skin problems including razor bumps, razor burn and redness. It can also help to stop bleeding from small nicks and cuts.

The Alum block has antiseptic properties that not only cool and refresh the skin after shaving but kill surface bacteria too.

Buy Alum Blocks At Executive Shaving

Our recommended alum block is by Osma and is available in two sizes

Osma Alum Block 75g


Osma Alum Block in Plastic Case 100g

£10.00 £14.50

How To Use an Alum Block

Wet the alum crystal, rub gently onto the shaved area, and then leave to dry on the face.
If you are applying a moisturiser or aftershave balm, splash water on the face after you have applied the alum block, pat dry with a towel and then apply your aftershave balm or moisturiser.

History of the Alum Block

The alum block is the original antiseptic aftershave which contains mineral salts that were originally used by the ancient Egyptians more than four thousand years ago for its healing and antiseptic properties.

How does an Alum Block work?

The Alum block salts stop bleeding by constricting blood vessels and tightening pores.

Storing the Alum Block

After use, clean the alum block with water, dry it off and store in a dry place where air circulates. If you allow the block to remain moist or exposed to moisture it will simply dissolve. If you own one that came in a plastic case, dry the alum before storing it in the case.

Sensitive Skin Sufferers Be Aware

If you have dry or sensitive skin then we do not recommend using alum blocks more than two or three times weekly as the minerals used are astringent which means that they draw moisture from the skin.

Other Alum Stone Uses

Oily, Greasy, Spotty Skin?

Alum Blocs can also be used as an all-natural treatment for oily complexions and acne. An Alum crystal is a great, natural product to combat greasy skin, spots and acne.

After showering or washing the face, gently apply an Alum stone on the affected area. The Alum Block will dry the skin and spots leading to a better appearance. Alternatively, apply to spots and pimples last thing at night.

Don't use the Alum stone on the face more than twice daily as it could lead to the skin over-compensating by producing more oil.

Using an Alum Block as an Antiperspirant - a Natural Deodorant

For centuries people in Africa, the Middle East and Asia have known that applying an Alum Block to the underarms will give excellent odour and sweat protection, an added benefit is it is 100% natural.
An Alum crystal is ideal for those who wish to use a natural antiperspirant. Apply the Alum stone to the underarms for a reliable, alcohol free antiperspirant. Alum Blocks are non-scented so you can still use your favourite scented deodorant.
Alum Blocks are highly effective in controlling excess sweating.

After Waxing Treatment

Alum Blocks are good for calming the skin after waxing, they are suitable for sensitive areas such as the bikini area and the face.

Alum Blocks Available At Executive Shaving

At the Executive Shaving Company we recommend Osma Bloc as a good quality, reliable alum block. Available in two sizes of 75g and 100g, they are a good size, easy to hold without dropping and to allow for precise use.

Osma Bloc have been producing the finest natural Potassium Alum blocks since the mid-1950s. They only select the best alum crystals to make in to their natural alum blocks.

Alternatives to Alum Blocks For Wet Shavers

As an alternative to using an Alum Block, you could use a Styptic Pencil which, unlike the alum block, is specifically used for individual cuts and nicks and is made from the alum block crystal, then its powdered form is concentrated into a stick similar in size to a lipstick or sometimes a matchstick. To view our range of Styptic Pencils click here.

If you are looking for an alternative for travelling, then try our Alum Matchsticks. These small size books of matches feature a small amount of alum at the tip of each match stick. Simply tear one off, wet the tip and use as required.

Proraso Shave Cut Healing Gel is an astringent healing gel that can be used to treat nicks or cuts you suffer during shaving. Apply a tiny amount of gel to the nick or cut and it will stop bleeding, the gel will also form a protective covering on the cut to protect it from becoming infected.


If you have any queries at all about Alum Blocks what they are and how to use them, then don't hesitate, get in touch. Call us on +44 (0)141 880 3040, use the LiveChat option, or email

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