Top 5 Best Alum Blocks for Shaving

Alum Block is an essential grooming tool that will treat your skin well after a traditional wet shave. It dries quickly within a couple of seconds. Then, you have to rinse your face with cold water to put off the alum crystals.

Alum Block is one of the best post-shave skin relief products that refreshes and soothes your skin. It has many benefits and comes at a much lower price than other aftershave products like lotion, cream, gel, balms, and splashes. 

In this blog, we will discuss in detail the best alum blocks and the factors to consider before buying one.

What is an alum block?

Alum Block is a mineral block composed of potassium alum having antibacterial and abrasive qualities. However, it is not suitable for dry or sensitive skin because it draws moisture. It is a post-shaving tool used for cosmetic purposes. 


Alum block has several benefits. It

  • relaxes and rejuvenates the skin, 
  • limits the spread of bacteria, 
  • offer protection against disease-causing germs,
  • avoid razor burns and ingrown hairs,
  • alleviate against redness, itching and, 
  • stop bleeding caused by minor nicks and cuts.
  • closes the skin pores.

How to use it?

  1. Wash your face with cold water after shaving to close the pores. Clear the shaving cream and soap from your face. 
  2. Soak alum block in cold water
  3. Lightly massage the alum block across your skin.
  4. Allow it to rest for 20 seconds on your face to tighten and exfoliate the skin pores.
  5. Then, rinse the face again with cold water.
  6. Apply moisturizing cream on the face after drying the face with a towel.
  7. Some people who had razor burns while shaving might experience burning sensations and itching on the skin.

Gentleman Jon Alum Block

Gentleman Jon alum block effectively reduces razor burns, inflammation, and razor bumps. It is like a finishing touch for a flawless shave. It is made of 100% potassium alum having antiseptic and anti-stringent properties which will soothe your face and make your skin glow. It is the #1 best-selling alum bloc on Amazon.

It can last for several months if used daily and properly. It closes the pores to stop further itching on the skin. Also, it reduces the bleeding due to minor nicks and cuts. You can use it after shaving with a straight razor, safety razor, disposable cartridge razor.

Suggestions for use:

Moisten the alum block. Apply gently over the hydrated skin in the affected (inflammation) areas. Let it rest for a few seconds. Then, rinse your face with cold water.


It comes in a durable plastic case and weighs 3.7 fluid ounces (approx 105 grams).


It is available at a low price of $7.99 on the Gentleman’s Jon website and Amazon.


It is popular, overall best alum block, and most-reviewed on Amazon. Around 4300 Customers who bought this product have reviewed it on Amazon having an excellent average rating of 4.5 stars.

View on Official website of Gentleman Jon: 

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Bloc Osma Alum Block

Bloc Osma alum block is a handmade product manufactured in France. The natural alum crystals soothe and cools the skin and act as a balm. It has been used for centuries to heal damaged skin and as an underarm natural deodorant and antiperspirant.

It has natural astringent properties that close razor nicks and prevent blood clots. It is an excellent post-shave healer, facial skin toner, natural deodorant, and a handy antiseptic tool. It also regulates blood circulation and is effective against skin burns.

Suggestions for use:

Soak the block in water. Apply to wet skin immediately after shaving to kill surface bacteria. Then, dry your face with a towel.


It weighs 2.65 ounces (0.18 pounds).


It is available on Amazon at $9.99. 


Around 3700 Customers who bought this product have reviewed it on Amazon with a fabulous average rating of 4.5 stars. It is a highly recommended product.

View on Amazon:

View on Ubuy’s website:

Proraso Alum Block

Proraso Alum Bloc is a 100% natural potassium alum stone block with 100% natural astringent properties. Applying it after a close shave reduces redness and skin irritation and helps to stop the bleeding due to minor cuts. It relaxes and tightens the skin, provides a toned skin feeling, and prevents burning sensations.

It is easy to use and does not sting too much or deteriorate quickly. It is also suitable for sensitive skin. It is dermatologically tested and an ideal aftershave product.

Suggestions for use:

  • Wash your face with cold water. 
  • Gently glide the stone over your skin.
  • Let it rest for a few seconds.
  • Then, rinse your face with lukewarm water and dry it with a towel.


It weighs 0.26 pounds (100 milliliters).


It is available at a fair price on Amazon at $11.89.


Around 780 Customers who bought this product have reviewed it on Amazon. It has an outstanding rating of 4.6 stars by the customers. 90% of them have left positive reviews and are highly satisfied with this product.

View on Proraso’s Website:

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RazoRock Alum Block

RazoRock Alum Block is made from potassium alum mineral salts, which are naturally antibacterial, natural, biodegradable, hypoallergenic, and without fragrance. It is an aftershave healing and antiseptic stick used post-shave to calm and heal the skin. It natural heals the razor burn, relieves irritation, and can stop the bleeding from nicks or cuts. 

It has multiple purposes and can also be used as a deodorant, odor remover, facial toner if you have oily skin to prevent acne. It has been used safely in products for thousands of years, you feel comfortable about its safety and efficacy. It is non-staining and contains no alcohol or parabens. After using it, your skin will feel soft and soothing, with no greasy residue. 

Suggestions for use:

  • Run the top of the stick underwater for 3-5 seconds.
  • Then apply to shave area.
  • Allow drying for 30-40 seconds.
  • Wash off the alum crystals with cold water.


It is an aftershave stick available in 2.15 ounces (60 grams) container.


It is economically available at $11.99 and can last several months to a year.


Around 450 Customers who bought this product have reviewed it on Amazon. It has received an average rating of 4.6 stars from the customers. 90% of them have left positive reviews and are highly satisfied with this product.

View on Razorrock’s Website:


Omega Potassium Alum Stick

Omega Potassium Alum Stick is an after-shaving facial toner made in Italy.

It is a handy tool for any shaver and keeps the skin healthy and looking handsome after shaving. It will heal the nicks and cuts fast without leaving any white spots on the skin.

It is a natural antiseptic that controls microbial activity and prevents infection.

Suggestions for use:

For best results, run the stick over the skin immediately after shaving. Using it after a shave will close the pores and instantly stop the bleeding of nicks or cuts. Also, it will tighten and tone the skin due to its astringent properties.


It is available in 60 milliliters (1 ounce) container. It is made from natural potassium alum. The stick is solid with a protective cover, and the edges of the alum are rounded for comfortable application.


It is reasonably priced, long-lasting, and offers value for money. It is available for $6.99 on Amazon.


Around 730 customers who bought this product have reviewed it on Amazon and many of them highly recommend it. It has received an average rating of 4.5 stars from the customers.

View on Amazon:

View on West Coast Shaving website

Things to be Considered before buying alum stone block

The majority of men might not have heard of alum block because it is difficult to find. Nowadays, some pharma companies sell alum blocks and can be found in chemist or pharma stores. You can also get the alum blocks from the professional stores that sell shaving equipment, accessories, and aftershave products.

  • But the problem is that the offline stores quote the price higher than stated on online websites. It is recommended to buy directly from the manufacturer’s official website or eCommerce platform like Amazon.
  • Before buying, always do research by going through various shaving blogs. Also, you must check the reviews left by customers.
  • Also, you should read the product description thoroughly, including the price, features, specifications, durability, warranty, etc. Verify whether the alum block of a particular brand is suitable for your skin type. 

Last but not least, it gets highly recommended to buy from a reputable brand. It will give you peace of mind, provide safety and ensure high quality. Do not buy inferior quality that has compressed alum and is not long-lasting.


Alum Block is a great aftershave product that most men are unaware of. It is highly beneficial to the skin and has a significant impact on the quality of the shave, and it is definitely worth buying.