fumed silica
Worth a lookShows low returns (1.0%), but a concentrated shelf (top 5 take 87% of clicks) keeps it on the watch list.
Returns
Incredible1.0%return rate — above 5% kills the launch gate
Avg price
Incredible$42.44avg listing price — sweet spot $15–$100
Conversion
Great10.7%search→purchase rate — share of searches ending in a sale
Review moat
Great248.8avg incumbent reviews — the moat a new listing must climb
Price range
Good$6.96–$145.15cheapest 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
Okay4.5★avg incumbent rating — lower means beatable quality
Brand share
Bad93%top-5 brand share — brand-locked demand
Competition
Bad87%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
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.Peak months: Jul · busiest ÷ quietest = 1.7×
Top fumed silica search terms
- fumed silica13K/yr
- cabosil11K/yr
- fumed silica powder6K/yr
- epoxy thickener5K/yr
- cab o sil3K/yr
- cabosil fumed silica3K/yr
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.
All 10 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Fasco Epoxies - Fasco Cab-O-SIL Fumed Silica thickener in Quart tub
Fasco Epoxies$12.934.6★844 rev
Fasco Epoxies Cabosil - Fumed Silica Thickener in Gallon Tub
Fasco Epoxies$24.814.6★274 rev
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$6.964.1★75 rev
TITGGI Fumed Silica Thickener for Epoxy Resin and Coatings 1 Quart
TITGGI$13.414.4★301 rev
Cab-o-SIL M5 Fumed Silica 10lb Bag - Cabosil Paint Resin and Epoxy Thickening Agent
Generic$145.154.2★8 rev
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$145.1315 rev
Cab-o-SIL M5 Fumed Silica 10lb Bag - Cabosil Paint Resin and Epoxy Thickening Agent
Generic$145.158 rev
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$6.9675 rev
TotalBoat Fumed Silica Cabosil Powder Thickener for Epoxy Resin Polyester Resin Paint Silicone and Varnish (5 Quart)
TotalBoat$26.7358 rev
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$12.9034 rev
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$21.684.8★
Fasco Epoxies - Fasco Cab-O-SIL Fumed Silica thickener in Quart tub
Fasco Epoxies$12.934.6★
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$6.964.1★
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$12.904.8★
Fasco Epoxies Cabosil - Fumed Silica Thickener in Gallon Tub
Fasco Epoxies$24.814.6★
What buyers say about fumed silica
What buyers praise and complain about, mined from review topics.What buyers love
“As advertised”
“Excellent product”
“Good value; one bag will go pretty far”
“easy to use”
“Worked Great for boat gel coat repair”
“Works great to thicken gel coat”
“It also provides a lattice-work structure that is hard”
“and it's super lightweight material”
“Big jug of good stuff”
“Works great for thickening up fiberglass rosin when you don't want it to drip leak or run”
What buyers complain about
“it took a lot of the material to thicken a small amount”
“Didnt work at all”
“This is actually kind of difficult to work with because it's so incredibly lightweight and fine,”
“Its not a quality thing”
“Good stuff don't inhale it”
Top return reasons
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.