Is alum block profitable to sell on Amazon United States?

The niche generates $191K/yr across 7 tracked products. 90-day search growth is +11.3%. Flapen's verdict: Skip it (41/100).

How competitive is the alum block niche?

7 brands and 12 sellers compete. The top 5 products take 93% of clicks and top 5 brands hold 93% of demand.

What do buyers complain about in alum block?

Top complaints mined from reviews: Durability, Hard Feel, Allergies. The return rate is 0.7%.

When does demand for alum block peak?

Demand peaks in Mar; the busiest month runs 1.6× the quietest.

What does it cost to enter the alum block niche?

Listings span $6.16–$14.89; the average listing price is $9.24 (sweet spot $15–$100). The average incumbent carries 1,807 reviews — the moat a new listing must climb.

alum block

Skip it

Prices mostly outside the sweet spot ($6.16–$14.89) — this niche doesn't clear our bar today.

Returns

Incredible0.7%

return rate — above 5% kills the launch gate

Conversion

Incredible13.1%

search→purchase rate — share of searches ending in a sale

Review moat

Okay1,807.43

avg incumbent reviews — the moat a new listing must climb

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Growth

Okay+11.3%

90-day search growth — must beat 0% to launch

Market size

Okay$191K

$191K/yr · 157K searches

Avg price

Okay$9.24

avg listing price — sweet spot $15–$100

Brand share

Bad93%

top-5 brand share — brand-locked demand

Competition

Bad93%

top-5 click share — a locked-up shelf

Price range

Bad$6.16–$14.89

cheapest to priciest tracked listing — scored on the share inside $15–$100

According to Flapen's Amazon United States niche tracking, alum block is a $191K/yr Amazon United States market (157K searches/yr). The top 5 brands hold 93% of demand. Demand peaks in Mar. Verdict: Skip it — 41/100.

Data updated Jul 15, 2026 · scored weekly · How we score niches

alum block market data

Units sold / yr: 20K–25K; avg 2,000–2,500/product
Revenue / yr: $185K–$231K; units × avg price
Conversion rate: 13.1%
Avg BSR: #25
Page quality: 0%
Prime: 100%
Sponsored: 100%
Out of stock: 0.0%
Avg brand age: 79 months
Avg seller age: 167 days

Competition & brand share

The top 5 products capture 93% of clicks — a locked-up shelf that new listings rarely crack.

Brands

7 falling

Sellers

Top-5 brand share

93%

Top 20: 100%

Top-5 click share

93%

Top 20: 100%

Open market

Gentleman Jon52%
Proraso26%
G.B.S7%
Homeda4%
Parker Safety Razor4%
the shave factory4%
Open — no brand owns it (1 brand, 3%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +11.3% search growth over the last 90 days.

Peak months: Mar · busiest ÷ quietest = 1.6×

Open Trend

Top alum block search terms

alum block109K/yr +9.3%12.0% conv.
alum block for shaving31K/yr -3.5%11.6% conv.
alum bar17K/yr +54.4%6.6% conv.

All search terms

Top alum block products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 7 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Gentleman Jon 3.7 Ounce Alum Block in Plastic Case - Upgrade Your Shave - Soothing Aftershave Solution for Shaving Razor Burn Relief - Travel Friendly Durable Plastic Case Included Aftershave for Men

Gentleman Jon$9.424.4★7,280 rev

Proraso Post-Shave Stone Natural Alum Block 1 Count (Pack of 1)

Proraso$9.764.6★2,968 rev

Gents Alum Block in Plastic Case | Upgrade Your Shave - Soothing Aftershave Solution for Shaving Razor Burn Relief - Travel Friendly Durable Plastic Case Included (3.5 Ounces Pack of 3)

G.B.S$10.134.5★834 rev

Homeda Alum Block for Shaving Alum Stone for Face Piedra De Alumbre Natural Bar for Underarm Fitkari Fitkiri Allum Deodorant for Men and Women - with Storage Case (100g - 1 Piece)

Homeda$7.234.6★409 rev

Parker Large Alum Block with Travel Case (125 g./4.4 oz.) - A Natural Aftershave with Antiseptic Properties - an Essential Item for Every Wet Shaver

Parker Safety Razor$14.894.5★818 rev

Newest

by launch date

Homeda Alum Block for Shaving Alum Stone for Face Piedra De Alumbre Natural Bar for Underarm Fitkari Fitkiri Allum Deodorant for Men and Women - with Storage Case (100g - 1 Piece)

Homeda$7.23409 rev

1y ago

The Shave Factory Alum Block Aftershave Solution for Shaving Razor Burn Relief in Plastic Case 3.53 oz. 100gr.

the shave factory$6.16112 rev

1y ago

Classic Samurai Block Alum Post-Shave Stone 2.48oz

Classic Samurai$7.08231 rev

4y ago

Gents Alum Block in Plastic Case | Upgrade Your Shave - Soothing Aftershave Solution for Shaving Razor Burn Relief - Travel Friendly Durable Plastic Case Included (3.5 Ounces Pack of 3)

G.B.S$10.13834 rev

7y ago

Proraso Post-Shave Stone Natural Alum Block 1 Count (Pack of 1)

Proraso$9.762,968 rev

8y ago

What buyers say about alum block

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall26%

“GREAT product that goes way back”

Efficiency13%

“Does the job well”

Value For Money12%

“It's so cheap”

Advertised Vs Actual Product11%

“Exactly what I needed”

Durability5%

“Long lasting and durable”

Suitability Dry Skin4%

“I say shave, do a cold rinse, apply the alum and let it dry, cold rinse again, dry reasonably well, and apply a good aftershave”

Smell4%

“Great under the arms to prevent odors”

Size-Overall3%

“It used to fit very nicely in the box”

Symptom Reduction2%

“great on pimples”

Allergies2%

“no more irritation from other gel”

What buyers complain about

Durability24%

“isnt as durable”

Hard Feel11%

“Too rough”

Allergies8%

“Harsh to skin”

Quality-Overall7%

“Poor Quality”

Texture/Consistency-Overall7%

“The block was crumbly”

Moist/Dry6%

“Just wet and slide across your face after shaving”

Functionality-Overall4%

“Did not work for me”

Defective Material/Parts4%

“Arrived broken”

Dilute/Watery2%

“MOLDY”

Product Condition2%

“I think I got a used product which is not what u paid for”

Top return reasons

Defective Material/Parts25%

Material Quality13%

Size-Overall9%

Advertised Vs Actual Product8%

Functionality-Overall7%

Durability6%

Stain Resistance5%