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🪒 Elevate your shave game—because smooth skin waits for no one!
Gentleman Jon Alum Block is a premium 3.7oz potassium alum aftershave solution designed to relieve razor burn, stop bleeding from minor cuts, and tone skin. Housed in a durable travel-friendly plastic case, it offers months to years of reliable use, making it an essential grooming upgrade for men seeking a polished, irritation-free shave.








| Asin | B00FA35K02 |
| Best Sellers Rank | #1 in Shaving Alum |
| Item Model Number | 617395017744 |
| Manufacturer | Gentleman Jon |
| Product Dimensions | 2.75 x 2 x 1.15 inches; 3.7 ounces |
| Upc | 796433825678 767644749480 617395017744 |
User
Must-have for wetshaving, very soothing and lasts forever!
This stuff is great! I just recently started wetshaving with a double edge safety razor and at first I just used Witch Hazel and Clubman Pinaud aftershave lotion. I still use both of those but after being highly recommended to me by several people I picked this up as well. It is DEFINITELY worth it! Being a beginner I'm still learning the proper technique and I was getting some irritation and even some "razor bumps". The witch hazel and aftershave helped a bit, as well as some facial moisturizer, but adding the Alum block to my regiment helped a LOT today! I just received it and tried it after shaving today and instantly felt a difference. I was told it also lets you know how you are shaving, if you rub it on your face afterwards and you feel some slight burning it means you weren't using good technique and you should adjust your angle and pressure. I did pretty well today with my DE razor and didn't feel any burning so that's good! I did have one small nick on my chin and it stopped the bleeding instantly. Before I recieved this the past couple shaves left my face very irritated and dry, even some dry skin peeling off in places. It's now been about 7 hours since my last shave using this and my face feels super soft and smooth with zero irritation. I'm sold! Everything I was told about this stuff is true so far, it is great!Just wet the block and rub it on your face, it soothes the razor burn and will stop any bleeding almost instantly in case you nicked yourself. I have a Clubman styptic pencil as well for cuts but this stuff works just as well and doesn't burn quite as much, plus you can use this stuff all over your face instead of just for cuts/nicks. The styptic pencil is also white and leaves a white residue on your face while this is clear and not noticeable.From what I've read these things last for YEARS. You just rub the block and barely use any, so paying the $8 is a good investment. There was a slightly cheaper and smaller block here on Amazon but it did not have a case. I'm kind of a neat freak and I like everything organized so the case is totally worth it! The Razorock brand Alum block has a case as well but it is more expensive and is only 3.2oz vs the 3.7oz this one is. Based on my research this is the best deal here on Amazon for an Alum block with case, plus the Gentleman Jon artwork/logo is really cool! I'm a huge fan of the vintage/retro styling.I've also read some people use this as a natural deodorant, I may try that in the future because I'm trying to be healthier and reduce the amount of chemicals in products I use. Since I'm using this one on my face though I'm gonna have to get a second one for that purpose, I wouldn't want to use this on my armpits and then on my face hah!TL;DR: Great quality, great case, great results, great value. If you get skin irritation from shaving, start using this after shaving!
User
MAGIC AND AMAZING
FIXED ME INGROWN HAIRS ON MY NECK AFTER SHAVING. This is an amazing product and instantly fixed my shaving rash I have been dealing with for years
User
Gentleman Jon Alum Block
Excellent Alum block at an economical price. Works great!
User
Good for stopping minor bleeds, but crumbly texture
The alum block works well for stopping a minor bleed. It can crumble if it gets wet, so handle it with care.I bought this block in the hopes that it might work as a deodorant crystal in the same way that I've done with another brand's alum block in the past, but it didn't work at all for that. Given that it wasn't meant for that purpose, I can't fault it for not working in that way.
User
Wonderful and well formed block.
This alum block tames razor burns and cuts. It also shows where the user applied too much pressure and went over the same place with the razor. It also make the skin feel nice after rinsing.
User
Works fantastic
It stops nicks from bleeding in seconds.
User
The perfect finish to a wet shave
Much better than the pencil forms .
User
A Poorly Made Powder Alum Block That Has More In Common With A Brick Than An Alum Crystal =/
Honestly, the positive reviews are a bit baffling. Maybe production processes have changed, but I'm doubtful. Either those reviewers have skin like cured leather stretched over a tank chassis, or they’re using this on something other than their face. If your skin has nerve endings, blood flow, or any semblance of humanity, this product will make you regret your life choices.I genuinely don’t understand how this thing is being used by actual human beings. This alum block feels less like a shaving accessory and more like something you’d find in a masonry kit. The surface is incredibly rough -- dragging it across your skin after shaving is like rubbing a chunk of unfinished concrete on freshly scraped flesh.First-time alum users especially: run. This isn’t a proper crystal block -- it’s a brutally rough compressed powder brick, and easily the worst alum block I’ve ever used. Using it feels less like post-shave care and more like exfoliating with sandpaper. After one use, my face looked like I’d lost a fight with a cheese grater, which is impressive considering the shave itself caused almost no irritation. While plenty of alum blocks today are compressed powder, this one stands out for all the wrong reasons: badly made, poorly finished, and completely unfit for post-shave use. Save your face, your neck, and your sanity. Unless you’re exfoliating a rhinoceros, avoid this alum block at all costs. If this is your first alum block and you walk away thinking, “Maybe alum just isn’t for me” or “My skin must be too sensitive,” rest assured: it’s not you -- it’s this glorified brick.The best joke here is the price. For the same money, you can buy a real, cut-from-a-crystal alum block instead of this crumbly, compressed powder impostor. Don’t let the shiny “Amazon’s Top Pick” or “Best Seller” badges fool you -- apparently no one involved actually used it on their face.If you skim other reviews, you’ll see photos of these blocks arriving pre-destroyed, shedding powder like chalk, or developing spider-crack fractures after minimal use. That’s because this isn’t a solid crystal; it’s a brittle landscaping paver in disguise. An alum block shouldn’t disintegrate during shipping or self-destruct in your bathroom. This one manages both. PLEASE, save your money.
User
Not recommended! Buyer beware! If I could have given this product 0 or ½ star, if I would.
How this product get 5 stars reviews I can't even begin to guess.Firstly, this "Alum Block" is not a true cut alum but one that is reconstituted from alum dust / bits / waste from the process of making true Cut Alum Blocks. This should have been stated in the product description.Secondly, whatever process the brand used, it was shoddy.I received my purchase with a good portion of the block broken and crumbled into bits, powdered.Not only did I lost about ¼ of the block, powered, (first picture, the one with the Gentleman Jon Box) the block looked like it was compressed poorly. with the core much more loosely packed than the edge.Had mine didn't break apart, I would have been able to use this block for a while until I hit that loose core in a few months or so, and the block will start to crumble.To be clear, (last picture with an actual cut alum block) a proper alum block, that I had dropped and while it chipped, it didn't crumble but smoothed out to a glass like block after some use. (I had it for over 2 years now)The Gentleman Jon's that I received, didn't even survived shipping, and now that the loose core is exposed, probably will not last too long with use.This is a very poorly and shoddily made product.I do not recommend anyone buying this.Go buy an Osma block instead.
User
Perfect
Good quality alum bar. Works really well. Nice sturdy storage box is handy. Will buy again
User
Works perfectly!
A must after a good, close shave. Wouldn't be without. Sanitizes and helps stop and leakers. Comes with a plastic, reusable box so it is easy to store. A product that I will be returning to in the future.
User
Item arrived in broken case
broken plastic case
User
DON’T BUY
Not proper Alum, as others have said this is a crushed alum that has been compacted together, use it to grate your face if you want, I ended up buying a better brand for same price and using the tub to store it
Trustpilot
3 weeks ago
3 weeks ago