aquarium epoxy
Skip itSoft demand (-17.7% this quarter) — this niche doesn't clear our bar today.
Quality gap
Incredible3.9★avg incumbent rating — lower means beatable quality
Conversion
Great10.4%search→purchase rate — share of searches ending in a sale
Returns
Great1.4%return rate — above 6% kills the launch gate
Avg price
Great$18.45avg listing price — sweet spot $15–$100
Price range
Great$6.30–$65.59cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Okay2,430.93avg incumbent reviews — the moat a new listing must climb
Brand share
Okay87%top-5 brand share — brands hold most of the demand
Competition
Bad74%top-5 click share — a locked-up shelf
Market size
Bad$69K$69K/yr · 36K searches
Growth
Bad-17.7%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, aquarium epoxy is a $69K/yr Amazon United States market (36K searches/yr). The top 5 brands hold 87% of demand. Verdict: Skip it — 49/100.
Data updated Jul 17, 2026 · scored weekly · How we score niches
aquarium epoxy market data
- Units sold / yr
- 3K–4K
- avg 100–250/product
- Revenue / yr
- $55K–$74K
- units × avg price
- Launch success
- —
- 0 of 2 new (360d)
- Conversion rate
- 10.4%
- Avg BSR
- #212
- Page quality
- 0%
- Prime
- 86%
- Sponsored
- 57%
- Out of stock
- 0.0%
- Avg brand age
- 77 months
- Avg seller age
- 169 days
Competition & brand share
The top 5 products capture 74% of clicks — a locked-up shelf that new listings rarely crack.Brands
10 falling
Sellers
45
Top-5 brand share
87%
Top 20: 100%
Top-5 click share
74%
Top 20: 100%
Open market
9%
- Instant Ocean28%
- Two Little Fishies25%
- Avenuebool18%
- selsil8%
- J-B Weld7%
- PC Products4%
- Open — no brand owns it (4 brands, 9%)
Demand
Weekly Amazon search volume, last 24 weeks — -17.7% search growth over the last 90 days.Top aquarium epoxy search terms
- aquarium safe epoxy9K/yr
- aquarium epoxy8K/yr
- reef epoxy5K/yr
- reef putty4K/yr
- aquarium epoxy putty4K/yr
- aquarium putty3K/yr
- coral putty4K/yr
Top aquarium epoxy 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 14 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Instant Ocean HoldFast Epoxy Stick Fish Safe 4 oz
Instant Ocean$11.684.3★2,599 rev
Two Little Fishes Marine Reef Coral Live Rock Putty Aquastick Coralline Red Jumbo 114G
Two Little Fishies$22.924.3★282 rev
Avenuebool 4 Ounce Epoxy Putty with Gloves Marine Reef Live Rock Coral Putty Fish Safe Aquarium Glue Grey Reef Safe Epoxy Stick or Plants Moss Coral Stone Wood Aquascaping Quick Drying (1pack)
Avenuebool$9.612.8★85 rev
SELSIL Aquarium Silicone Clear Sealant - High Elasticity Safe for Fish Solvent-Free Ozone-Resistant Transparent 10.14 Fl Oz 1 Pack
selsil$13.054.6★1,530 rev
Avenuebool 4 Ounce Epoxy Putty with Gloves Marine Reef Live Rock Coral Putty Fish Safe Aquarium Glue Grey Reef Safe Epoxy Stick or Plants Moss Coral Stone Wood Aquascaping Quick Drying(2pack)
Avenuebool$16.272.8★85 rev
Newest
by launch dateAvenuebool 4 Ounce Epoxy Putty with Gloves Marine Reef Live Rock Coral Putty Fish Safe Aquarium Glue Grey Reef Safe Epoxy Stick or Plants Moss Coral Stone Wood Aquascaping Quick Drying(2pack)
Avenuebool$16.2785 rev
Avenuebool Ounce Epoxy Putty with Gloves Marine Reef Live Rock Coral Putty Fish Safe Aquarium Glue Grayish White Reef Safe Epoxy Stick or Plants Moss Coral Stone Wood Aquascaping Quick Drying
Avenuebool$9.4822 rev
Avenuebool 4 Ounce Epoxy Putty with Gloves Marine Reef Live Rock Coral Putty Fish Safe Aquarium Glue Grey Reef Safe Epoxy Stick or Plants Moss Coral Stone Wood Aquascaping Quick Drying (1pack)
Avenuebool$9.6185 rev
CaribSea Rock Lock 2 Minute Cement 500g (17oz) for Corals and Rocks
Carib Sea$26.3840 rev
J-B Weld WaterWeld 1 Hour Cure Epoxy Putty Stick - 2 Pack Off-White (8277-2)
J-B Weld$12.241,542 rev
Trending
90-day click momentumSELSIL Aquarium Silicone Clear Sealant - High Elasticity Safe for Fish Solvent-Free Ozone-Resistant Transparent 10.14 Fl Oz 1 Pack
selsil$13.054.6★
Avenuebool 4 Ounce Epoxy Putty with Gloves Marine Reef Live Rock Coral Putty Fish Safe Aquarium Glue Grey Reef Safe Epoxy Stick or Plants Moss Coral Stone Wood Aquascaping Quick Drying(2pack)
Avenuebool$16.272.8★
Two Little Fishes Marine Reef Coral Live Rock Putty Aquastick Coralline Red Jumbo 114G
Two Little Fishies$22.924.3★
Instant Ocean HoldFast Epoxy Stick Fish Safe 4 oz
Instant Ocean$11.684.3★
CaribSea Rock Lock 2 Minute Cement 500g (17oz) for Corals and Rocks
Carib Sea$26.383.2★
What buyers say about aquarium epoxy
What buyers praise and complain about, mined from review topics.What buyers love
“Easy to work with”
“Excellent Product”
“Works as advertised”
“good price”
“Otherwise perfect for the job”
“A terrific clear epoxy resin”
“No issue with adhesion”
“Instructions are very clear”
“this sealed my leak up”
“Work in water”
What buyers complain about
“Sprayer tank leak”
“Did not work”
“Quality control was absent in their checking products being sold to customers”
“Smells horrible”
“Didnt stick well”
“It may be a little more expensive”
“Didn't hold well”
“Doesnt harden enough”
“The water putty not successful for use on water”
“Impossible to use”
Top return reasons
Common questions
- Is aquarium epoxy profitable to sell on Amazon United States?
- The niche generates $69K/yr across 14 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -17.7%. Flapen's verdict: Skip it (49/100).
- How competitive is the aquarium epoxy niche?
- 10 brands and 45 sellers compete. The top 5 products take 74% of clicks and top 5 brands hold 87% of demand.
- What do buyers complain about in aquarium epoxy?
- Top complaints mined from reviews: Leak-Proof, Functionality-Overall, Quality-Overall. The return rate is 1.4%.
- What does it cost to enter the aquarium epoxy niche?
- Listings span $6.30–$65.59; the average listing price is $18.45 (sweet spot $15–$100). The average incumbent carries 2,431 reviews — the moat a new listing must climb.