black grout
Skip itA concentrated shelf (top 5 take 100% of clicks) — this niche doesn't clear our bar today.
Conversion
Incredible17.2%search→purchase rate — share of searches ending in a sale
Quality gap
Great4.2★avg incumbent rating — lower means beatable quality
Avg price
Good$14.27avg listing price — sweet spot $15–$100
Price range
Good$8.90–$23.07cheapest to priciest tracked listing — scored on the share inside $15–$100
Returns
Okay3.2%return rate — above 5% kills the launch gate
Review moat
Bad6,429.8avg incumbent reviews — the moat a new listing must climb
Growth
Bad-6.7%90-day search growth — must beat 0% to launch
Market size
Bad$65K$65K/yr · 27K searches
Competition
Bad100%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, black grout is a $65K/yr Amazon United States market (27K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Feb–Sep. Verdict: Skip it — 36/100.
Data updated Jul 27, 2026 · scored weekly · How we score niches
black grout market data
- Units sold / yr
- 4K–5K
- avg 500–750/product
- Revenue / yr
- $57K–$71K
- units × avg price
- Conversion rate
- 17.2%
- Avg BSR
- #32
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 100%
- Out of stock
- 0.0%
- Avg brand age
- 61 months
- Avg seller age
- 191 days
Competition & brand share
The top 5 products capture 100% of clicks — a locked-up shelf that new listings rarely crack.Brands
2 falling
Sellers
3
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
100%
Top 20: 100%
Open market
0%
- Rainbow Chalk Markers Limited95%
- YaoQiYou5%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -6.7% search growth over the last 90 days.Peak months: Feb, Sep · busiest ÷ quietest = 2.3×
Top black grout search terms
- black grout pen13K/yr
- grout pen black9K/yr
- black grout pen for tile5K/yr
Top black grout 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.
All 5 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Grout Pen Black Tile Paint Marker: Waterproof Grout Paint Tile Grout Colorant and Sealer Pen - Black Narrow 5mm Tip (7mL)
Rainbow Chalk Markers Limited$8.904.2★6,514 rev
Grout Pen Black Tile Paint Marker: Waterproof Grout Paint Tile Grout Colorant and Sealer Pen - Narrow 5mm 2 Pack with Extra Tips (7mL) - Black
Rainbow Chalk Markers Limited$17.844.3★13,572 rev
Grout Pen Black Tile Paint Marker: Waterproof Grout Paint Tile Grout Colorant and Sealer Pen - Black Narrow 5mm Tip (7mL) - 3 Pack
Rainbow Chalk Markers Limited$23.074.4★5,415 rev
5 PCS Tile Grout Pen Home Repair Pen Tile Paint Markers for Tiles Floor Wall Bathroom Kitchen Repair Tools (Black)
YaoQiYou$9.723.9★134 rev
Grout Pen Black Tile Paint Marker: Waterproof Grout Paint Tile Grout Colorant and Sealer Pen - Black Wide 15mm Tip (20mL)
Rainbow Chalk Markers Limited$11.814.2★6,514 rev
Newest
by launch dateGrout Pen Black Tile Paint Marker: Waterproof Grout Paint Tile Grout Colorant and Sealer Pen - Black Narrow 5mm Tip (7mL) - 3 Pack
Rainbow Chalk Markers Limited$23.075,415 rev
5 PCS Tile Grout Pen Home Repair Pen Tile Paint Markers for Tiles Floor Wall Bathroom Kitchen Repair Tools (Black)
YaoQiYou$9.72134 rev
Grout Pen Black Tile Paint Marker: Waterproof Grout Paint Tile Grout Colorant and Sealer Pen - Narrow 5mm 2 Pack with Extra Tips (7mL) - Black
Rainbow Chalk Markers Limited$17.8413,572 rev
Grout Pen Black Tile Paint Marker: Waterproof Grout Paint Tile Grout Colorant and Sealer Pen - Black Narrow 5mm Tip (7mL)
Rainbow Chalk Markers Limited$8.906,514 rev
Grout Pen Black Tile Paint Marker: Waterproof Grout Paint Tile Grout Colorant and Sealer Pen - Black Wide 15mm Tip (20mL)
Rainbow Chalk Markers Limited$11.816,514 rev
Trending
90-day click momentumGrout Pen Black Tile Paint Marker: Waterproof Grout Paint Tile Grout Colorant and Sealer Pen - Black Narrow 5mm Tip (7mL)
Rainbow Chalk Markers Limited$8.904.2★
Grout Pen Black Tile Paint Marker: Waterproof Grout Paint Tile Grout Colorant and Sealer Pen - Black Narrow 5mm Tip (7mL) - 3 Pack
Rainbow Chalk Markers Limited$23.074.4★
Grout Pen Black Tile Paint Marker: Waterproof Grout Paint Tile Grout Colorant and Sealer Pen - Black Wide 15mm Tip (20mL)
Rainbow Chalk Markers Limited$11.814.2★
5 PCS Tile Grout Pen Home Repair Pen Tile Paint Markers for Tiles Floor Wall Bathroom Kitchen Repair Tools (Black)
YaoQiYou$9.723.9★
Grout Pen Black Tile Paint Marker: Waterproof Grout Paint Tile Grout Colorant and Sealer Pen - Narrow 5mm 2 Pack with Extra Tips (7mL) - Black
Rainbow Chalk Markers Limited$17.844.3★
What buyers say about black grout
What buyers praise and complain about, mined from review topics.What buyers love
“Easy to use”
“EXCELLENT PRODUCT”
“Seems to work great”
“Color is good”
“easy to wipe off”
“It worked better than expected”
“its lasted pretty well ordered new one to do touch ups”
“Followed the directions as specified”
“The size was perfect”
“it covered fine with extra”
What buyers complain about
“Didnt last very long”
“Very messy”
“this product is very expensive”
“It barely covered any”
“Did our bathroom is a little bit of a challenge”
“This product does not work well”
“Over the past four years the grout became uneven in color”
“Grout paint”
“u definitely aren't going to get thickness out of it”
“does not do what it says”
Top return reasons
Common questions
- Is black grout profitable to sell on Amazon United States?
- The niche generates $65K/yr across 5 tracked products. 90-day search growth is -6.7%. Flapen's verdict: Skip it (36/100).
- How competitive is the black grout niche?
- 2 brands and 3 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in black grout?
- Top complaints mined from reviews: Durability, Ease Of Cleaning, Value For Money. The return rate is 3.2%.
- When does demand for black grout peak?
- Demand peaks in Feb–Sep; the busiest month runs 2.3× the quietest.
- What does it cost to enter the black grout niche?
- Listings span $8.90–$23.07; the average listing price is $14.27 (sweet spot $15–$100). The average incumbent carries 6,430 reviews — the moat a new listing must climb.