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Osma Alum Block 100gr in PVC Box (Premium Quality)

Brand: Osma  |  SKU: PR410
Collection: Alum Block
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Regular price $2595

Free Urban Delivery
Over $120

60-Day Return Promise
(Unused & Original)

Trusted by Over
30,000 Kiwis

Shipping & Delivery

Same-Day Dispatch by 4pm | 100% Local NZ Stock

Fast shipping via NZ Post. Delivery target; next working day (our reports show that 94% of urban orders arrived within 1–2 business days in Apr 2026).

  • Free Urban Delivery on orders over $120 (Standard: $6.95)
  • Discounted Rural Delivery just $4.99 over $120 (Standard: $10.95)

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We offer a 60-Day Return Promise. If your purchase isn’t quite right, simply return it unused / unopened and in its original condition within 60 days of delivery for a refund.

Highlights

Take a Closer Look

This premium-quality 100g French Osma alum block helps soothe irritation and razor burn after shaving. It is an all-natural astringent that helps stop minor nicks and cuts from bleeding. 

Not only does it aid in soothing skin irritation, but the properties in alum also ensure that the beard bristles grow straight out from your face and neck, which helps to prevent ingrown hairs.


How to use it?

Moisten it with cold water and gently rub it over the entire face to act as an antiseptic. Avoid using it around the eyes or sensitive areas. Leave it on for a minute or so, then rinse it off with cold water. Not only does it aid in soothing skin irritation and razor burn after shaving, but the properties in the Alum block ensure that the hairs on your face grow straight out from your face and neck, which prevents ingrown hairs.


This alum Block comes in a handy plastic box, making it ideal for travel or storing it hygienically at home.

  • Premium Alum Block
  • Smooth surface and bevelled edge
  • Genuine Osma Labs
  • Made in France since 1957
  • Size 100g, 65mm x 43mm x 22mm
  • This Osma Alum Block comes in a cardboard box


Important note:

Don't use the alum block before wet-shaving.
DO NOT use around the eyes or sensitive areas.


Since 1957, Osma offers to customer’s high quality products dedicated to wet shaving. In respect to the craft traditions, rigorous selection of our raw materials, choice of natural ingredients are the values which we always put forward in the creation of our products.

Key Features

  • Rating out of 5
    5.0
  • Made in
    France

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Customers praised this alum block for effectively sealing nicks and cuts, with many noting it's "very soothing" and calms irritated skin. The included storage case was frequently mentioned as convenient. Some noted it may sting initially. Shoppers appreciated the large size, excellent quality, and fantastic value for the price.

  • Calms my nicked skin really well
  • Very soothing and seals small cuts and nicks with ease.
  • For the price, this is a fantastic alum block.
Cuts (positive)Skin (positive)Quality (positive)Block (positive)Price (positive)
  • 5 stars: 14 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
D
D.L. (Auckland, New Zealand)
Do you recommend this Product?: Yes
Beautiful chunk of crystal

Beautiful large chunk of crystal. Dries nicely by resting it on the edges of the box.

T
T.Y. (Auckland, New Zealand)
Do you recommend this Product?: Yes
Good Alum Block - Amazing Price

For the price, this is a fantastic alum block. Love that it comes with a case so that you don't have to worry about that either.

M
M.E. (Auckland, New Zealand)
Do you recommend this Product?: Yes
Stops Bleeding?: Instantly
The "Sting" Factor?: Noticeable
Skin Feel After?: Toned
Works well and better than other Alum I have

Works well and better than other Alum I have used

B
B. (Auckland, New Zealand)
Very happy with this, works great

Very happy with this, works great. I would recommend

A
A. (England, United Kingdom)
Do you recommend this Product?: Yes
Osmaslun block

Excellent product which does the job

A
A.D.

Awesome product. Calms my nicked skin really well

T
T.A. (Auckland, New Zealand)
Do you recommend this Product?: Yes

Very refreshing

D
D.M. (Auckland, New Zealand)
Excellent

Love this brand, big stone, nice storage case, easy to use.

E
E.N. (Auckland, New Zealand)
Ouch

This little block is a great buy.
It can "sting" a little at first but it seals the little nicks nicely.

D
D.M. (Auckland, New Zealand)
Soothing Plus

Love this stone, very soothing and seals small cuts and nicks with ease.

A
A.P.
Great product - Easy to use, and very effective.

Fantastic for razor burn, bumps and irritation. The box is handy, the block is a good size and will last a long long time!

M
M. (Canterbury, New Zealand)

Very nice alum block made in france comes in nice we plastic case to store it in should last quit awhile will buy more as needed.

P
P.F. (Auckland, New Zealand)
Osama alum

Comes in a handy plastic box,good quality,excellent service as always.

A
A. (Auckland, New Zealand)
Pretty good

Smaller sized alum. But these last years so no worries there. Comes in a convenient hard case. Great quality product.