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🪒 Elevate your shave game—because your skin deserves the gentleman’s touch
Osma Bloc Alum Block is a 75g pure potassium alum stone from France, designed to soothe shaving irritation, stop bleeding, and act as a natural antiseptic and deodorant. Free from parabens, fragrances, and dyes, it offers a clean, long-lasting, and multi-functional post-shave ritual favored by discerning men since 1957.








| ASIN | B004NEHR28 |
| ASIN | B004NEHR28 |
| Age Range Description | Adult |
| Benefits | Antibacterial |
| Best Sellers Rank | 26,940 in Health & Personal Care ( See Top 100 in Health & Personal Care ) 5 in Shaving Alum |
| Brand Name | Osma Laboratoires |
| Customer Reviews | 4.3 4.3 out of 5 stars (4,839) |
| Customer reviews | 4.3 4.3 out of 5 stars (4,839) |
| Is discontinued by manufacturer | No |
| Item Form | Block |
| Item Weight | 82 g |
| Item model number | BLOC1 |
| Manufacturer | Osma Laboratoires |
| Manufacturer | Osma Laboratoires |
| Manufacturer Part Number | BLOC1 |
| Material Type Free | Paraben Free, Fragrance Free, Dye Free |
| Model Number | BLOC1 |
| Number of Items | 75 |
| Product Dimensions | 3.81 x 2.54 x 5.72 cm; 81.65 g |
| Scent Name | Unscented |
| Skin Type | All |
| UPC | 798256388668 750557017425 793379161440 749447616466 |
| Unit Count | 75.0 gram |
J**S
The Perfect Finishing Touch - Now A Requirement!
This is great product. Like many here I had never used one of these until I purchased this from here recently. Actually I'd never heard of it before - and my friends haven't either! I happened to come across it while researching traditional wet shaving. Now I wouldn't be without it. My problem is sensitive skin and often have skin burn following shaving, my skin seems to hold heat for a while following shaving. But I also have a fairly quick bristle growth rate so have to shave regularly. I've tried various pre/during/post shaving products and methods to try and help and this has been one of the successes. The block arrived quickly in the nice box as pictured, the block is tough and cold, like a stone/mineral block, small in size but should last for ages. Following shaving I use it by wetting and wiping over my face and neck, 3 or 4 coatings. keep the block wet as it does dry quickly and is tough to use when it is drying. Leaves a very pleasant cool feeling, skin feels taut and smooth, seems to seal any nicks/cuts and leaves a nice sheen. Some prefer to wash their face once applied but I left it on because it feels really nice and protective on your skin. Seems to stop your skin becoming too oily as well; you feel clean and fresh. Very pleasant product. It's now a requirement in my shaving process, I can't recommend it highly enough. Natural products always win.
C**H
Best value alum block
An excellent value alum block. Certain well known shops sell their own branded blocks for astronomical prices but what you get is exactly the same. I have in the past paid three times as much for a block from a certain Mayfair based shaving emporium but alum is alum and I can categorically state from a users experience that there is no difference whatsoever. There is no need to pay more. If you have not used alum before as part of your shaving ritual it is something you should definitely consider. Alum is a natural styptic and anti-septic and will seal and sterilise any small nicks in the skin. It will also help you to improve your technique and tell you when your razor is getting blunt. You can expect a little bit of stinging after applying the alum no matter what but if you are scraping the skin and causing lots of abrasion or your blade is blunt then you will really feel it. My technique is to finish shaving, wash face in warm water to remove soap, submerge face in cold water them make alum block wet with cold water and pass thoroughly over all shaved areas. Follow that with a skin tonic and a moisturiser and your face will feel smoother than it ever has. An extra benefit of using alum I find is that I hardly ever get collar burn if I shave in the morning and then wear a tie. It really settles the skin down again quickly after shaving. Tip: alum is a salt so it melts (slowly) in water. Make sure you dry it off thoroughly after use and store it somwhere dry. If you do then this small block will last a very long time - probably more than a year. Tip: Alum is an anti-septic and can be very helpful for acne even if you don't shave. I bought my teenage son one and he uses it to keep his spots under control. Tip: You can even use it as a deodorant because it closes pores and kills bacteria - you might want to get two blocks though if you are using one on your pits!
M**A
Good product
Good product does the job.
M**M
A must have for shaving comfort
Thank goodness I found this. I wouldn't be without one now. It will last for ages too. The Osma block (at least for me) fits into the shaving regime to combat razor burn and irritation a job which it performs very well. Doesn't matter how you shave i.e DE, cartridge etc., if you like a close shave with sharp blades or make multiple passes this is a must for 'closing up' the skin and soothing irritation. Your skin can only take being 'harrassed' for so long without it complaining and this (in conjunction with a good alcohol free balm afterwards) will counter a lot of the aggression you impose on your skin during a shave. You can tell after a shave if you've gone too hard as this gives you good feedback with a sort of minor sting which passes very quickly. The feeling is a bit like throwing alcohol based scent on your skin (like we did before we knew better) but much milder. It certainly doesn't hurt. It's actually quite hard to believe that such a little and seemingly inert product can help that much but, at least for me, I wouldn't go for a close shave without one on hand. Just don't let it slip out of your wet fingers of it will probably shatter or at least splinter if it hits the sink. I use it after a cold flanel on the face after the last shaving pass. Make sure your face is still wet and just run it round the shave area. If you need to, just run it under some water so that it runs over your face 'slick'. Not sure if I'm doing this right but it works for me. One thing it WONT do is close up a bad cut or , as in my case, where I've run over a mole too aggressively (I try not to but a new Feather blade takes no prisoners). You'll need a stiptic pencil for those ones. The other thing I've found is that Proraso pre/post shave cream seems not to like being applied after you run the Osma block over your face. It seems to sort of curdle or reject the Prorazo. Strange but true. As a result I've switched to using Proraso cream as a pre-shave only (in conjuntion with Proraso shaving cream) and now use Nivea balm (on Amazon at a very good price) after the Osma Block just to wrap things up. No problems here. I can honestly say that I've not had anything approaching razor burn since using this product. It's as important a part of my shaving kit as any other.
A**R
So this is sold as an aftershave and for razor nicks, but I saw people online saying it works great as a deodorant so I figured why not try it. I've always had problems with body odor. Didn't matter what soap or deodorant I used, I always ended up stinky. Started using this alum block as deodorant 3 days ago and honestly I can't believe it. Even 24 hours later, no smell at all. Nothing I've ever used has done that. It's cheap, the block will probably last me forever, and it actually works. I seriously don't get why more people don't know about this. Try it you will not regret it.
V**I
I love using it every morning after my shave.
J**.
I use this block as both an underarm de-odorizer and an aftershave treatment on my face. Yup. I use the same block for both. The reason it works on your pits is because it creates a hostile environment for odor causing bacteria. That's just by getting its residue on your skin. Imagine how much the bacteria would hate to live on a solid block of the stuff. Thus, it takes on no odor and does not cause any bacterial razor bumps or anything. As an aftershave treatment, it stops bleeding from tiny cuts and weepers that are not leaking much, and it disinfects the whole surface that it is applied to. For a substantial cut, it won't stop the bleeding and you will need a styptic pencil, so if you have a tendency to hack your face up, this won't be your best solution. However, you will find this soothing as a daily application, so it should definitely be a part of your tool kit. This is good for what it's good for, and the styptic pencil handles the rest. Keep both on hand. As a deodorant, it surprises me how effective this is. I use it daily, and it prevents odor all day if I don't sweat, or a partial day if I do. This is not an anti-perspirant, so if you decide to go out and chop some wood, don't be surprised if you need to reapply some alum. Or you can do what I do, which is keep a stick of deodorant around for emergencies. As it is though, I would say this works better than the organic deodorants I have had to use for years because of skin allergies to anti-perspirants. This is a solid chunk of alum, so it isn't wearing down much. I think this thing could probably last a couple years with daily use. I want to point out that this does not leave a visible residue on your face. You do not need to rinse or wipe it off. I apply it while my face is still wet after I rinse off my shaving cream remnants, and I let it dry. Then I put on an aftershave splash and lotion and head out the door.
Y**E
Llegó rápido y en buen estado. La piedra no es muy grande, pero da para muchos usos. Viene en una caja como de cartón ligero. Nunca había usado una piedra de alumbre pero la verdad es que funciona muy bien. Ayuda mucho contra la irritación y si te haces algún corte para el sangrado enseguida. Estoy contento con la compra, lo recomiendo.
F**L
Anti bacterial, soothing, nice results
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