---
title: "Fsr — $28K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/fsr"
last_updated: "2026-08-12T00:18:33.345Z"
locale: en
meta:
description: "Niche score 52/100 · $28K/yr market · 11K searches/yr. Brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 52/100 · $28K/yr market · 11K searches/yr. Brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Fsr — $28K/yr Amazon US Niche (2026) - Flapen"
---
# **fsr**
**Worth a look**
Shows low returns (0.9%), but brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list.
Market size 7Growth 74Conversion 88Competition 15Returns 95Price range 83Avg price 95Brand share 0Review moat 67Quality gap 73
**Returns**
**Incredible****0.9%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****$24.79**
avg listing price — sweet spot $15–$100
**Conversion**
**Great****10.2%**
search→purchase rate — share of searches ending in a sale
**Price range**
**Great****$9.41–$46.89**
cheapest 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**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Good****828.82**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Bad****82%**
top-5 click share — a locked-up shelf
**Market size**
**Bad****$28K**
$28K/yr · 11K searches
**Brand share**
**Bad****100%**
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 ~~](https://flapen.com/research/methodology)
## **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.
0%10%$3K20%$6K30%$8K40%$11K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 11 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Davis Instruments - 790 FSR Fiberglass Stain Remover (16-Ounce)**Davis Instruments**$24.76**4.2★737 rev](https://www.amazon.com/dp/B001446K4G) [2**STAR BRITE Gel FSR Xtreme Fiberglass Stain Remover Removes Rust Tannic & Waterline Stains No Sanding Required**STAR BRITE**$19.48**4.2★45 rev](https://www.amazon.com/dp/B0F4S375S4) [3**FSR Davis Fiberglass Stain Remover**Davis Instruments**$27.23**4.3★295 rev](https://www.amazon.com/dp/B0171Q12V6) [4**Davis Instruments FSR Big Job Bottle 2 Litter (792)**Davis Instruments**$46.89**4.6★271 rev](https://www.amazon.com/dp/B0014418FW) [5**FSR Davis Fiberglass Stain Remover 2 Liters - 792**Davis Instruments**$46.52**4.3★295 rev](https://www.amazon.com/dp/B0171Q13ZG)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**STAR BRITE GEL FSR Xtreme Fiberglass Stain Remover Removes Rust Tannic & Waterline Stains No Sanding Required**STAR BRITE**$31.98**45 rev5mo ago](https://www.amazon.com/dp/B0GKHTDF99) [**STAR BRITE Gel FSR Xtreme Fiberglass Stain Remover Removes Rust Tannic & Waterline Stains No Sanding Required**STAR BRITE**$19.48**45 rev1y ago](https://www.amazon.com/dp/B0F4S375S4) [**Bolsen Tech FSR502 FA502 Pressure Sensor Resistance Stress Test Force Sensing Resistor for arduino Diy Kit 1pcs FSR502**Bolsen Tech**$13.33**3 rev5y ago](https://www.amazon.com/dp/B098NZKLBW) [**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**$9.41**2,041 rev8y ago](https://www.amazon.com/dp/B076QHX2M6) [**TotalBoat White Knight Fiberglass Stain Remover (15 Ounce)**TotalBoat**$16.21**229 rev10y ago](https://www.amazon.com/dp/B01CYOEO56)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**STAR BRITE Gel FSR Xtreme Fiberglass Stain Remover Removes Rust Tannic & Waterline Stains No Sanding Required**STAR BRITE**$19.48**4.2★**▲ 142%**](https://www.amazon.com/dp/B0F4S375S4) [**STAR BRITE GEL FSR Xtreme Fiberglass Stain Remover Removes Rust Tannic & Waterline Stains No Sanding Required**STAR BRITE**$31.98**4.2★**▲ 110%**](https://www.amazon.com/dp/B0GKHTDF99) [**FSR Davis Fiberglass Stain Remover**Davis Instruments**$27.23**4.3★**▲ 48%**](https://www.amazon.com/dp/B0171Q12V6) [**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**$16.69**4.5★**▲ 38%**](https://www.amazon.com/dp/B00Z9N4WC0) [**Bolsen Tech FSR502 FA502 Pressure Sensor Resistance Stress Test Force Sensing Resistor for arduino Diy Kit 1pcs FSR502**Bolsen Tech**$13.33**5.0★**▲ 22%**](https://www.amazon.com/dp/B098NZKLBW)
**~~View all trending →~~**
## **What buyers say about fsr**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Ease Of Cleaning**20%
*“Amazing Cleaner”*
**Efficiency**13%
*“It does the work for you”*
**Advertised Vs Actual Product**11%
*“As advertised”*
**Ease Of Use**10%
*“Easy to use”*
**Quality-Overall**7%
*“well formulated product”*
**Value For Money**4%
*“In my book its a good value for the money”*
**Stain Resistance**3%
*“The stain was diminished”*
**Rusts/Corrodes**2%
*“This stuff is really good at removing rust stains”*
**Texture/Consistency-Overall**2%
*“while the gel consistency is nice”*
**Brightness/Shine/Glow**2%
*“When it was finally rinsed I saw a minor improvement in cleanliness and shine”*
### **What buyers complain about **
**Stain Resistance**25%
*“Does not work on any stains”*
**Ease Of Cleaning**13%
*“It didnt completely clean it like how I thought it would”*
**Functionality-Overall**10%
*“Didn't work for me”*
**Rusts/Corrodes**4%
*“did not even lighten my rust spots”*
**Quality-Overall**3%
*“But I was underwhelmed with its performance”*
**Value For Money**2%
*“It is a bit costly in my opinion for the size of the solution”*
**Color**2%
*“there is only a little bit of a shade left where there was very dark black dye”*
**Advertised Vs Actual Product**1%
*“Not as good as shown on you tube”*
**Water Resistance**1%
*“It had a pretty gnarly water line”*
**Maintenance And Repair**1%
*“I would never put one in again there so much maintenance especially after you get some years on them”*
### **Top return reasons **
**Functionality-Overall**24%
**Stain Resistance**19%
**Advertised Vs Actual Product**19%
**Leak-Proof**16%
**Ease Of Cleaning**5%
**Value For Money**4%
**Product Condition**4%
**Defective Material/Parts**2%
**Compatibility-Overall**1%
**Instructions/User Manual/Troubleshooting**1%
## **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.
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