Is slow release toilet bowl cleaner profitable to sell on Amazon United States?

The niche generates $361K/yr across 9 tracked products. 90-day search growth is -3.1%. Flapen's verdict: Skip it (46/100).

How competitive is the slow release toilet bowl cleaner niche?

3 brands and 39 sellers compete. The top 5 products take 91% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in slow release toilet bowl cleaner?

Top complaints mined from reviews: Durability, Value For Money, Smell. The return rate is 0.2%.

When does demand for slow release toilet bowl cleaner peak?

Demand peaks in Aug; the busiest month runs 1.9× the quietest.

What does it cost to enter the slow release toilet bowl cleaner niche?

Listings span $6.58–$37.54; the average listing price is $18.84 (sweet spot $15–$100). The average incumbent carries 5,913 reviews — the moat a new listing must climb.

slow release toilet bowl cleaner

Skip it

Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.

Returns

Incredible0.2%

return rate — above 5% kills the launch gate

Avg price

Great$18.84

avg listing price — sweet spot $15–$100

Conversion

Great8.2%

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

Price range

Good$6.58–$37.54

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

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Market size

Good$361K

$361K/yr · 232K searches

Review moat

Bad5,912.78

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-3.1%

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

Competition

Bad91%

top-5 click share — a locked-up shelf

Brand share

Bad100%

top-5 brand share — brand-locked demand

According to Flapen's Amazon United States niche tracking, slow release toilet bowl cleaner is a $361K/yr Amazon United States market (232K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Aug. Verdict: Skip it — 46/100.

Data updated Jul 21, 2026 · scored weekly · How we score niches

slow release toilet bowl cleaner market data

Units sold / yr: 20K–25K; avg 2,000–2,500/product
Revenue / yr: $377K–$471K; units × avg price
Conversion rate: 8.2%
Avg BSR: #127
Page quality: 0%
Prime: 100%
Sponsored: 44%
Out of stock: 1.3%
Avg brand age: 44 months
Avg seller age: 152 days

Competition & brand share

The top 5 products capture 91% of clicks — a locked-up shelf that new listings rarely crack.

Brands

3 falling

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

91%

Top 20: 100%

Open market

Fluidmaster51%
Kaboom47%
Happy Toilet Cleaner2%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -3.1% search growth over the last 90 days.

Peak months: Aug · busiest ÷ quietest = 1.9×

Open Trend

Top slow release toilet bowl cleaner search terms

kaboom toilet cleaning system58K/yr +11.7%6.5% conv.
fluidmaster flush n sparkle34K/yr +41.0%9.2% conv.
kaboom toilet bowl cleaner16K/yr +36.1%4.0% conv.
toilet cleaning system59K/yr -73.6%0.7% conv.
flush n sparkle7K/yr +25.5%9.0% conv.
fluid master flush n sparkle6K/yr +53.3%8.5% conv.
flush and sparkle7K/yr +2.2%7.5% conv.
flush and sparkle toilet cleaner system7K/yr -26.3%9.4% conv.
kaboom toilet cleaner5K/yr +31.2%5.4% conv.
kaboom scrub free toilet cleaning system4K/yr +119.1%10.7% conv.

All search terms

Top slow release toilet bowl cleaner 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 9 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Kaboom Scrub Free! Toilet Bowl Cleaner System with 2 Refills

Kaboom$12.724.3★14,296 rev

Fluidmaster 8300 Flush n Sparkle Automatic Toilet Bowl Cleaning System with Bleach Cartridge 1 Count (Pack of 1) ( Packaging May Vary)

Fluidmaster$13.284.2★9,312 rev

Fluidmaster 8302P8 Flush n Sparkle Automatic Toilet Bowl Cleaning System Refills Bleach 2-Pack

Fluidmaster$10.734.6★5,817 rev

Fluidmaster 8102P8 Flush n Sparkle Automatic Toilet Bowl Cleaning System Refills Blue 2-Pack Upgraded Version

Fluidmaster$6.584.0★4,162 rev

Church And Dwight 35113 kaboom Scrub Free Toilet Cleaning System (Pack of 2)

Kaboom$22.314.5★2,131 rev

Newest

by launch date

Happy Toilet Cleaner Original Toilet Bowl Tablet Holder Automatic Toilet Bowl Cleaner - Easy to Install Toilet Tablet Holder Auto Toilet Cleaning System in Tank Caddy Septic Safe Flush Made in USA

Happy Toilet Cleaner$25.33192 rev

2y ago

Scrub Free! Continuous Clean Toilet Cleaning Refill 2 Pack (4 Boxes of 2 Pack Refill)

Kaboom$37.54601 rev

6y ago

3-Pack Refill Kaboom Scrub Free! Continuous Clean with OxiClean

Kaboom$28.1214,296 rev

11y ago

Kaboom Scrub Free! Toilet Bowl Cleaner System with 2 Refills

Kaboom$12.7214,296 rev

12y ago

Church And Dwight 35113 kaboom Scrub Free Toilet Cleaning System (Pack of 2)

Kaboom$22.312,131 rev

12y ago

What buyers say about slow release toilet bowl cleaner

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

What buyers love

Ease Of Cleaning28%

“Great cleaning item”

Quality-Overall12%

“Excellent product”

Assembly/Installation12%

“Easy install”

Efficiency10%

“Works great”

Smell5%

“it does an amazing job smells great”

Ease Of Use5%

“Easy to use”

Advertised Vs Actual Product4%

“Work Perfectly as advertised”

Value For Money3%

“Amazing product at a fair price”

Durability2%

“last for months”

Design-Overall1%

“Also, excellent design that delivers on its promises”

What buyers complain about

Durability12%

“Not long lasting”

Value For Money9%

“A Little Expensive”

Smell8%

“with no smell”

Size-Overall6%

“It Took a Little Modification to Make It Fit”

Compatibility-Overall6%

“There is a message on the product page advising the the Happy Toilet Cleaner is frequently returned due to compatibility issues”

Functionality-Overall6%

“Doesn't work”

Color5%

“The blue colored ones are terrible”

Assembly/Installation4%

“I could not figure out how to install this”

Ease Of Cleaning4%

“So far not sure if it cleans better”

Product Condition3%

“My item arrived dirty and looks used”

Top return reasons

Compatibility-Overall21%

Size-Overall19%

Color17%

Advertised Vs Actual Product13%

Value For Money4%

Wet Cleaning4%

Functionality-Overall4%