fsr
Worth a lookShows low returns (0.9%), but brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list.
Returns
Incredible0.9%return rate — above 5% kills the launch gate
Avg price
Incredible$24.79avg listing price — sweet spot $15–$100
Conversion
Great10.2%search→purchase rate — share of searches ending in a sale
Price range
Great$9.41–$46.89cheapest to priciest tracked listing — scored on the share inside $15–$100
Growth
Good+58.4%90-day search growth — must beat 0% to launch
Quality gap
Good4.3★avg incumbent rating — lower means beatable quality
Review moat
Good828.82avg incumbent reviews — the moat a new listing must climb
Competition
Bad82%top-5 click share — a locked-up shelf
Market size
Bad$28K$28K/yr · 11K searches
Brand share
Bad100%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, fsr is a $28K/yr Amazon United States market (11K searches/yr). The top 5 brands hold 100% of demand. Verdict: Worth a look — 52/100.
Data updated Jul 13, 2026 · scored weekly · How we score niches
fsr market data
- Units sold / yr
- 1K–1K
- avg 100–250/product
- Revenue / yr
- $25K–$31K
- units × avg price
- Conversion rate
- 10.2%
- Avg BSR
- #509
- Page quality
- 0%
- Prime
- 73%
- Sponsored
- 82%
- Out of stock
- 0.0%
- Avg brand age
- 87 months
- Avg seller age
- 175 days
Competition & brand share
The top 5 products capture 82% of clicks — a locked-up shelf that new listings rarely crack.Brands
4 rising
Sellers
101
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
82%
Top 20: 100%
Open market
0%
- Davis Instruments57%
- STAR BRITE36%
- TotalBoat5%
- Bolsen Tech2%
- Open — no brand owns it (0%)
Top fsr 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 11 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Davis Instruments - 790 FSR Fiberglass Stain Remover (16-Ounce)
Davis Instruments$24.764.2★737 rev
STAR BRITE Gel FSR Xtreme Fiberglass Stain Remover Removes Rust Tannic & Waterline Stains No Sanding Required
STAR BRITE$19.484.2★45 rev
FSR Davis Fiberglass Stain Remover
Davis Instruments$27.234.3★295 rev
Davis Instruments FSR Big Job Bottle 2 Litter (792)
Davis Instruments$46.894.6★271 rev
FSR Davis Fiberglass Stain Remover 2 Liters - 792
Davis Instruments$46.524.3★295 rev
Newest
by launch date
STAR BRITE GEL FSR Xtreme Fiberglass Stain Remover Removes Rust Tannic & Waterline Stains No Sanding Required
STAR BRITE$31.9845 rev
STAR BRITE Gel FSR Xtreme Fiberglass Stain Remover Removes Rust Tannic & Waterline Stains No Sanding Required
STAR BRITE$19.4845 rev
Bolsen Tech FSR502 FA502 Pressure Sensor Resistance Stress Test Force Sensing Resistor for arduino Diy Kit 1pcs FSR502
Bolsen Tech$13.333 rev
STAR BRITE Ultimate Fiberglass Stain Remover - Easy-to-Use Marine Grade Solution to Eliminate Tough Rust Leaf & Waterline Stains for Boats and More - Maximum Cleaning Power Gel Spray - 16 OZ (098916)
STAR BRITE$9.412,041 rev
TotalBoat White Knight Fiberglass Stain Remover (15 Ounce)
TotalBoat$16.21229 rev
Trending
90-day click momentumSTAR BRITE Gel FSR Xtreme Fiberglass Stain Remover Removes Rust Tannic & Waterline Stains No Sanding Required
STAR BRITE$19.484.2★
STAR BRITE GEL FSR Xtreme Fiberglass Stain Remover Removes Rust Tannic & Waterline Stains No Sanding Required
STAR BRITE$31.984.2★
FSR Davis Fiberglass Stain Remover
Davis Instruments$27.234.3★
STAR BRITE Instant Hull Cleaner - 32 Oz Gel Spray - Easily Remove Stains Scum Lines & Grime on Boat Hulls Fiberglass Plastic & Painted Surfaces - Easy to Use Formula (096132)
STAR BRITE$16.694.5★
Bolsen Tech FSR502 FA502 Pressure Sensor Resistance Stress Test Force Sensing Resistor for arduino Diy Kit 1pcs FSR502
Bolsen Tech$13.335.0★
What buyers say about fsr
What buyers praise and complain about, mined from review topics.What buyers love
“Amazing Cleaner”
“It does the work for you”
“As advertised”
“Easy to use”
“well formulated product”
“In my book its a good value for the money”
“The stain was diminished”
“This stuff is really good at removing rust stains”
“while the gel consistency is nice”
“When it was finally rinsed I saw a minor improvement in cleanliness and shine”
What buyers complain about
“Does not work on any stains”
“It didnt completely clean it like how I thought it would”
“Didn't work for me”
“did not even lighten my rust spots”
“But I was underwhelmed with its performance”
“It is a bit costly in my opinion for the size of the solution”
“there is only a little bit of a shade left where there was very dark black dye”
“Not as good as shown on you tube”
“It had a pretty gnarly water line”
“I would never put one in again there so much maintenance especially after you get some years on them”
Top return reasons
Common questions
- Is fsr profitable to sell on Amazon United States?
- The niche generates $28K/yr across 11 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +58.4%. Flapen's verdict: Worth a look (52/100).
- How competitive is the fsr niche?
- 4 brands and 101 sellers compete. The top 5 products take 82% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in fsr?
- Top complaints mined from reviews: Stain Resistance, Ease Of Cleaning, Functionality-Overall. The return rate is 0.9%.
- What does it cost to enter the fsr niche?
- Listings span $9.41–$46.89; the average listing price is $24.79 (sweet spot $15–$100). The average incumbent carries 829 reviews — the moat a new listing must climb.