Is grout sponge profitable to sell on Amazon United States?

The niche generates $161K/yr across 10 tracked products. 2 of 4 products launched in the last 360 days are still selling. 90-day search growth is +5.1%. Flapen's verdict: Skip it (47/100).

How competitive is the grout sponge niche?

8 brands and 39 sellers compete. The top 5 products take 82% of clicks and top 5 brands hold 90% of demand.

What do buyers complain about in grout sponge?

Top complaints mined from reviews: Advertised Vs Actual Product, Size-Overall, Quality-Overall. The return rate is 0.9%.

When does demand for grout sponge peak?

Demand is steady year-round — the busiest month runs 1.6× the quietest.

What does it cost to enter the grout sponge niche?

Listings span $3.90–$20.54; the average listing price is $8.45 (sweet spot $15–$100). The average incumbent carries 510 reviews — the moat a new listing must climb.

grout sponge

Skip it

A concentrated shelf (top 5 take 82% of clicks) — this niche doesn't clear our bar today.

Conversion

Incredible16.4%

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

Returns

Incredible0.9%

return rate — above 5% kills the launch gate

Review moat

Good510

avg incumbent reviews — the moat a new listing must climb

Quality gap

Good4.3★

avg incumbent rating — lower means beatable quality

Market size

Okay$161K

$161K/yr · 116K searches

Price range

Okay$3.90–$20.54

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

Growth

Okay+5.1%

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

Brand share

Bad90%

top-5 brand share — brand-locked demand

Avg price

Bad$8.45

avg listing price — sweet spot $15–$100

Competition

Bad82%

top-5 click share — a locked-up shelf

According to Flapen's Amazon United States niche tracking, grout sponge is a $161K/yr Amazon United States market (116K searches/yr). The top 5 brands hold 90% of demand. Verdict: Skip it — 47/100.

Data updated Jul 12, 2026 · scored weekly · How we score niches

grout sponge market data

Units sold / yr: 15K–20K; avg 1,250–1,500/product
Revenue / yr: $127K–$169K; units × avg price
Conversion rate: 16.4%
Avg BSR: #148
Page quality: 0%
Prime: 100%
Sponsored: 50%
Out of stock: 1.8%
Avg brand age: 49 months
Avg seller age: 172 days

Competition & brand share

The top 5 products capture 82% of clicks — a locked-up shelf that new listings rarely crack.

Brands

8 falling

Sellers

Top-5 brand share

90%

Top 20: 100%

Top-5 click share

82%

Top 20: 100%

Open market

QEP70%
M-D Building Products7%
MARSHALLTOWN6%
RAINFLOW5%
WAFJAMF4%
Brick N Bone Sponges3%
Open — no brand owns it (2 brands, 6%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +5.1% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.6×

Open Trend

Top grout sponge search terms

grout sponge43K/yr +8.0%12.4% conv.
drywall sponge16K/yr -15.9%8.2% conv.
tile sponge12K/yr +6.6%13.8% conv.
grout sponge for tile11K/yr +33.7%14.7% conv.
grout sponges7K/yr +9.2%10.0% conv.
grouting sponge5K/yr +18.6%11.1% conv.
drywall wet sanding sponge5K/yr -18.5%4.5% conv.
masonry sponge3K/yr +45.1%9.5% conv.
concrete sponge3K/yr +52.3%11.5% conv.
tile sponges for grouting4K/yr -25.0%16.2% conv.

All search terms

Top grout sponge 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 10 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

QEP 70005Q-6D 7.5 Inch x 5.5 Inch x 1.875 Inch Grouting Cleaning and Washing Sponge X-Large 6-Pack 6 Pack Yellow 6 Count

QEP$8.944.6★3,489 rev

QEP 70007-24 Scrubbing Sponge for Grouting & Cleaning 7.5 x 5.25

QEP$3.904.7★101 rev

QEP 70020-18 Epoxy Grout Sponge 7 x 5 x 2-1/2 Teal Color - Individually Bagged

QEP$4.994.9★27 rev

M-D Building Products 49152 5 in. x 7-1/2 in. Grout Sponge

M-D Building Products$4.644.7★59 rev

QLT by Marshalltown Drywall Sanding Sponge Dual-Sided Wet Sanding Block Reusable Dustless Drywall Finishing Sponge for Joint Compound Spackle Sheetrock Plaster DWS467

MARSHALLTOWN$7.134.4★523 rev

Newest

by launch date

1 Pack Extra Large Cleaning Sponges (7.5 x 5.5 x 1.9) Heavy Duty Grouting Car Wash & Multi-Surface Sponge Non-Scratch PU Foam for Tile Dishes Cars & Crafts Super Absorbent

WAFJAMF$5.0146 rev

2mo ago

QEP 70020-18 Epoxy Grout Sponge 7 x 5 x 2-1/2 Teal Color - Individually Bagged

QEP$4.9927 rev

5mo ago

RUBII 4 Pcs Drywall Wet Sanding Sponge 9 Inch Washable Double Sided Drywall Finishing Sponge Reusable Drywall Sanding Blocks for Wiping Dust Smoothing Surface

RUBII$13.1916 rev

6mo ago

RAINFLOW 4PCS Large Car Wash Sponge Sponges for Cleaning Extra Thick High-Density Pottery Sponges Scratch-Free Super Absorbent Reusable for Auto Detailing Waxing and Cleaning

RAINFLOW$7.1673 rev

12mo ago

Multi-Purpose Sponges for Cleaning - Yellow 2 Pack Large Sponges for Car Washing Tile & Grout All Purpose Cleaning

Brick N Bone Sponges$9.01515 rev

2y ago

What buyers say about grout sponge

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

What buyers love

Quality-Overall16%

“Good quality”

Value For Money15%

“Good value”

Ease Of Cleaning12%

“It does a pretty good cleaning to every surface you scrubbed”

Size-Overall10%

“Fit for purpose”

Durability9%

“These sponges hold up well”

Advertised Vs Actual Product5%

“These are built to do the job”

Wet Cleaning4%

“Worked great and a large sponge”

Washability3%

“They are great for washing walls too”

Hygiene-Overall3%

“Best shower sponges”

Ease Of Use2%

“Easy to use”

What buyers complain about

Advertised Vs Actual Product26%

“This is misleading”

Size-Overall17%

“HUGE”

Quality-Overall11%

“Garbage”

Thickness6%

“once opened they never got bigger than 1/2 thick”

Absorbency6%

“Don't Absorb Water As They Should”

Value For Money5%

“not worth the money”

Hard Feel5%

“the other one is hard and solid”

Functionality-Overall5%

“sponges never came to function”

Stretchability/Expandability/Elasticity4%

“they ended up expanding”

Suitable For Indoor2%

“Not for drywall”

Top return reasons

Size-Overall42%

Advertised Vs Actual Product12%

Value For Money9%

Functionality-Overall6%

Material Quality5%

Quality-Overall3%

Absorbency3%

Compatibility-Overall2%

Hard Feel2%

Stretchability/Expandability/Elasticity2%

Common questions

Is grout sponge profitable to sell on Amazon United States?: The niche generates $161K/yr across 10 tracked products. 2 of 4 products launched in the last 360 days are still selling. 90-day search growth is +5.1%. Flapen's verdict: Skip it (47/100).
How competitive is the grout sponge niche?: 8 brands and 39 sellers compete. The top 5 products take 82% of clicks and top 5 brands hold 90% of demand.
What do buyers complain about in grout sponge?: Top complaints mined from reviews: Advertised Vs Actual Product, Size-Overall, Quality-Overall. The return rate is 0.9%.
When does demand for grout sponge peak?: Demand is steady year-round — the busiest month runs 1.6× the quietest.
What does it cost to enter the grout sponge niche?: Listings span $3.90–$20.54; the average listing price is $8.45 (sweet spot $15–$100). The average incumbent carries 510 reviews — the moat a new listing must climb.