---
title: "Fumed Silica — $180K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/fumed-silica"
last_updated: "2026-08-07T19:22:49.558Z"
locale: en
meta:
description: "Niche score 51/100 · $180K/yr market · 40K searches/yr. A concentrated shelf (top 5 take 87% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 51/100 · $180K/yr market · 40K searches/yr. A concentrated shelf (top 5 take 87% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Fumed Silica — $180K/yr Amazon US Niche (2026) - Flapen"
---
# **fumed silica**
**Worth a look**
Shows low returns (1.0%), but a concentrated shelf (top 5 take 87% of clicks) keeps it on the watch list.
Market size 36Growth 54Conversion 90Competition 11Returns 95Price range 62Avg price 95Brand share 17Review moat 88Quality gap 33
**Returns**
**Incredible****1.0%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****$42.44**
avg listing price — sweet spot $15–$100
**Conversion**
**Great****10.7%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Great****248.8**
avg incumbent reviews — the moat a new listing must climb
**Price range**
**Good****$6.96–$145.15**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Good****+25.7%**
90-day search growth — must beat 0% to launch
**Market size**
**Okay****$180K**
$180K/yr · 40K searches
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Bad****93%**
top-5 brand share — brand-locked demand
**Competition**
**Bad****87%**
top-5 click share — a locked-up shelf
According to Flapen's Amazon United States niche tracking, fumed silica is a $180K/yr Amazon United States market (40K searches/yr). The top 5 brands hold 93% of demand. Demand peaks in Jul. Verdict: Worth a look — 51/100.
Data updated Jul 28, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **fumed silica market data**
- **Units sold / yr**
- **5K–6K**
- avg 250–500/product
- **Revenue / yr**
- **$212K–$255K**
- units × avg price
- **Conversion rate**
- **10.7%**
- **Avg BSR**
- **#98**
- **Page quality**
- **0%**
- **Prime**
- **70%**
- **Sponsored**
- **80%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **89 months**
- **Avg seller age**
- **185 days**
## **Competition & brand share**
The top 5 products capture 87% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**8 **▼falling
**Sellers**
**32**
**Top-5 brand share**
**93%**
Top 20: 100%
**Top-5 click share**
**87%**
Top 20: 100%
**Open market**
**5%**
- Fasco Epoxies54% - Fiberglass Supply Depot19% - TITGGI14% - Generic3% - Stone Coat Countertops3% - TotalBoat2% - Open — no brand owns it (2 brands, 5%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +25.7% search growth over the last 90 days.
1K600Spike '24Holiday '24Spike '25Prime Day '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jul · busiest ÷ quietest = 1.7×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/fumed-silica/trend)
## **Top fumed silica search terms**
- **fumed silica**13K/yr+16.8%10.7% conv. - **cabosil**11K/yr+23.8%11.9% conv. - **fumed silica powder**6K/yr+62.0%10.2% conv. - **epoxy thickener**5K/yr+2.7%9.7% conv. - **cab o sil**3K/yr+42.8%14.3% conv. - **cabosil fumed silica**3K/yr+31.0%14.8% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/fumed-silica/search-terms)
## **Top fumed silica 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%$18K20%$36K30%$54K40%$72K1101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**Fasco Epoxies - Fasco Cab-O-SIL Fumed Silica thickener in Quart tub**Fasco Epoxies**$12.93**4.6★844 rev](https://www.amazon.com/dp/B074Y6V7QT) [2**Fasco Epoxies Cabosil - Fumed Silica Thickener in Gallon Tub**Fasco Epoxies**$24.81**4.6★274 rev](https://www.amazon.com/dp/B0756L83XR) [3**Fiberglass Supply Depot Cabosil Fumed Silica (Quarter Pint Jar) - Resin Thickener for Non-Saggy Putty - Advanced Epoxy Resin Thickener - Professional Thixotropic Agent for Smooth Epoxy**Fiberglass Supply Depot**$6.96**4.1★75 rev](https://www.amazon.com/dp/B0CM6X5Y3H) [4**TITGGI Fumed Silica Thickener for Epoxy Resin and Coatings 1 Quart**TITGGI**$13.41**4.4★301 rev](https://www.amazon.com/dp/B09JSKQZL4) [5**Cab-o-SIL M5 Fumed Silica 10lb Bag - Cabosil Paint Resin and Epoxy Thickening Agent**Generic**$145.15**4.2★8 rev](https://www.amazon.com/dp/B08PY6JM15)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Cabosil M5 Fumed Silica Cab-o-SIL Industrial Grade Hydrophilic Enhancer for Epoxy Paints Varnishes Coatings Adhesives and Sealants (10 Pound Bag)**Marine Coat One**$145.13**15 rev2y ago](https://www.amazon.com/dp/B0D82LW2W1) [**Cab-o-SIL M5 Fumed Silica 10lb Bag - Cabosil Paint Resin and Epoxy Thickening Agent**Generic**$145.15**8 rev2y ago](https://www.amazon.com/dp/B08PY6JM15) [**Fiberglass Supply Depot Cabosil Fumed Silica (Quarter Pint Jar) - Resin Thickener for Non-Saggy Putty - Advanced Epoxy Resin Thickener - Professional Thixotropic Agent for Smooth Epoxy**Fiberglass Supply Depot**$6.96**75 rev2y ago](https://www.amazon.com/dp/B0CM6X5Y3H) [**TotalBoat Fumed Silica Cabosil Powder Thickener for Epoxy Resin Polyester Resin Paint Silicone and Varnish (5 Quart)**TotalBoat**$26.73**58 rev3y ago](https://www.amazon.com/dp/B0CCZQBWTT) [**Fiberglass Supply Depot - Cabosil Fumed Silica - Resin Thickener for Non-Saggy Putty - Advanced Epoxy Resin Thickener - Professional Thixotropic Agent for Smooth Epoxy - Easy to Use (1 Quart)**Fiberglass Supply Depot**$12.90**34 rev4y ago](https://www.amazon.com/dp/B09NMKXDPY)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**WEST SYSTEM 406 Colloidal Silica Epoxy Filler Thickening Additive for WEST SYSTEM Epoxy | Viscosity Control for Strong Structural Bonds | Made in the USA**West System**$21.68**4.8★**▲ 83%**](https://www.amazon.com/dp/B0000AY1OC) [**Fasco Epoxies - Fasco Cab-O-SIL Fumed Silica thickener in Quart tub**Fasco Epoxies**$12.93**4.6★**▲ 16%**](https://www.amazon.com/dp/B074Y6V7QT) [**Fiberglass Supply Depot Cabosil Fumed Silica (Quarter Pint Jar) - Resin Thickener for Non-Saggy Putty - Advanced Epoxy Resin Thickener - Professional Thixotropic Agent for Smooth Epoxy**Fiberglass Supply Depot**$6.96**4.1★**— 9%**](https://www.amazon.com/dp/B0CM6X5Y3H) [**Fiberglass Supply Depot - Cabosil Fumed Silica - Resin Thickener for Non-Saggy Putty - Advanced Epoxy Resin Thickener - Professional Thixotropic Agent for Smooth Epoxy - Easy to Use (1 Quart)**Fiberglass Supply Depot**$12.90**4.8★**— 7%**](https://www.amazon.com/dp/B09NMKXDPY) [**Fasco Epoxies Cabosil - Fumed Silica Thickener in Gallon Tub**Fasco Epoxies**$24.81**4.6★**— 5%**](https://www.amazon.com/dp/B0756L83XR)
**~~View all trending →~~**
## **What buyers say about fumed silica**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Advertised Vs Actual Product**28%
*“As advertised”*
**Quality-Overall**18%
*“Excellent product”*
**Value For Money**11%
*“Good value; one bag will go pretty far”*
**Ease Of Use**11%
*“easy to use”*
**Maintenance And Repair**5%
*“Worked Great for boat gel coat repair”*
**Thickness**5%
*“Works great to thicken gel coat”*
**Flexibility**5%
*“It also provides a lattice-work structure that is hard”*
**Weight Light**3%
*“and it's super lightweight material”*
**Size-Overall**3%
*“Big jug of good stuff”*
**Efficiency**3%
*“Works great for thickening up fiberglass rosin when you don't want it to drip leak or run”*
### **What buyers complain about **
**Thickness**43%
*“it took a lot of the material to thicken a small amount”*
**Functionality-Overall**21%
*“Didnt work at all”*
**Weight Light**14%
*“This is actually kind of difficult to work with because it's so incredibly lightweight and fine,”*
**Quality-Overall**7%
*“Its not a quality thing”*
**Breathability**7%
*“Good stuff don't inhale it”*
### **Top return reasons **
**Size-Overall**27%
**Advertised Vs Actual Product**17%
**Functionality-Overall**13%
**Value For Money**9%
**Material Quality**9%
**Thickness**4%
**Ease Of Use**4%
**Maintenance And Repair**2%
**Product Condition**2%
**Compatibility-Overall**2%
## **Common questions**
- **Is fumed silica profitable to sell on Amazon United States?**
- The niche generates $180K/yr across 10 tracked products. 90-day search growth is +25.7%. Flapen's verdict: Worth a look (51/100).
- **How competitive is the fumed silica niche?**
- 8 brands and 32 sellers compete. The top 5 products take 87% of clicks and top 5 brands hold 93% of demand.
- **What do buyers complain about in fumed silica?**
- Top complaints mined from reviews: Thickness, Functionality-Overall, Weight Light. The return rate is 1.0%.
- **When does demand for fumed silica peak?**
- Demand peaks in Jul; the busiest month runs 1.7× the quietest.
- **What does it cost to enter the fumed silica niche?**
- Listings span $6.96–$145.15; the average listing price is $42.44 (sweet spot $15–$100). The average incumbent carries 249 reviews — the moat a new listing must climb.
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