5 Best Alum Blocks - May 2026

BEST OF THE BEST

Osma Alum

Block 2.65 oz. – Pack of 2

All-natural product that soothes irritated skin and closes nicks from shaving.

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PROS

Provides a good value per ounce, as you’ll receive two alum blocks in one order.
Versatile product that’s a good choice for toning the skin or serving as a deodorant.
Works best as a pre-shave application for electric shaving or as a post-shave application for mechanical shaving.
Sourced from France for a high level of quality.

CONS

Five-plus ounces of product may be more than some people need.

BEST BANG FOR THE BUCK

Gentleman Jon

3.7 oz. Alum Block in Plastic Case

Desirable price per ounce for a product that ships inside a plastic case to provide a good value.

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PROS

Gives your irritated skin a soothing feeling after a shave.
Helps to quickly heal nicks from shaving.
Block is a little larger than some other brands, giving you a longer-lasting product.
Corners and edges won’t break off if you keep it in the protective case.
Tones the skin without causing pores to clog.

CONS

Texture is odd, as it seems softer than some other alum blocks.

Parker Safety

Razor's Large Alum Block with Travel Case

One of the larger alum block products you’ll find, so it should last a long time, even in a busy home.

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PROS

Ships inside a plastic case, which will prevent the corners and edges from cracking.
Works perfectly after a shave to cool irritated skin and to close any minor nicks.
Uses only pure potash alum with no added chemicals.
Works nicely for men or women after shaving.
Reasonable price per ounce.

CONS

Plastic case may crack if it’s placed under stress.

B.I.G. Beard Balm

3.52 Oz. Large Alum Rock

Perfect product to reduce skin irritation after shaving and to tighten pores in the skin.

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PROS

Quickly closes nicks from shaving.
Ships inside a hard container to prevent the alum block from cracking.
Reasonable price per ounce.
Includes an option to download an e-book with shaving advice and tips.
Works nicely for women or men after a shave.
Doesn’t cause unwanted reactions with other grooming products.

CONS

This alum block may absorb some unwanted odors over time.

Caravelle

Alum Stone

Doesn’t ship as a formed rectangular block, so it’s offered at a very low price per ounce.

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PROS

Some people find the small chunks of alum block in this product to be easier to hold and use than a large block.
Good value for those who don’t want a rectangular block.
Consists of ammonium alum, which means it works better as an anti-perspirant than as a product to help with skin suffering from razor burn.

CONS

Doesn’t ship in a protective plastic case.
Some pieces are very small.

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First Reviewed

January 01, 2022

Models
considered

Hours
researched

Written by Kyle Schurman

Updated January 2022

An alum block is a natural healing product that’s primarily used as aftershave. Men use this block to calm sensitive skin post-shave and also heal minor nicks and cuts. These blocks are made of potassium alum and have natural antiseptic qualities. Part of a multi-step grooming routine that should be used before applying aftershave and/or face balm. Alum blocks have been used for thousands of years to calm irritated skin in a natural way. Ancillary benefits include using the block as a deodorant. Have other medical products on hand in the event you have an atypical shaving cut. Preventive qualities also help to reduce future shaving accidents.

Best Alum Blocks

Pros and Cons

Pros and Cons

Pros and Cons

Pros and Cons

Pros and Cons

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