Polyester Resin
Skip itA concentrated shelf (top 5 take 69% of clicks) — this niche doesn't clear our bar today.
Returns
Incredible0.4%return rate — above 5% kills the launch gate
Avg price
Incredible$45.61avg listing price — sweet spot $15–$100
Price range
Incredible$19.65–$88.97cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Great443.35avg incumbent reviews — the moat a new listing must climb
Conversion
Good4.7%search→purchase rate — share of searches ending in a sale
Growth
Okay+11.7%90-day search growth — must beat 0% to launch
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Brand share
Okay87%top-5 brand share — brands hold most of the demand
Market size
Okay$121K$121K/yr · 57K searches
Competition
Okay69%top-5 click share — leaders hold, buyers still browse
Is polyester resin profitable on Amazon?
According to Flapen's Amazon United States niche tracking, polyester resin is a $121K/yr Amazon United States market (57K searches/yr). The top 5 brands hold 87% of demand. Verdict: Skip it — 49/100.
Data updated Jul 24, 2026 · scored weekly · How we score niches
polyester resin market size & sales
Units sold, revenue, conversion and listing quality across the tracked shelf.- Units sold / yr
- 3K–3K
- avg 100–250/product
- Revenue / yr
- $114K–$137K
- units × avg price
- Conversion rate
- 4.7%
- Avg BSR
- #126
- Page quality
- 0%
- Prime
- 60%
- Sponsored
- 100%
- Out of stock
- 0.0%
- Avg brand age
- 67 months
- Avg seller age
- 191 days
Competition: brands, sellers & click share
The top 5 products take 69% of clicks — established leaders, but buyers still shop beyond them.Brands
11 rising
Sellers
50
Top-5 brand share
87%
Top 20: 100%
Top-5 click share
69%
Top 20: 100%
Open market
9%
- FGCI36%
- TotalBoat20%
- Polymer World17%
- Fiberglass Supply Depot8%
- Generic6%
- EVERCOAT Body Shop3%
- Open — no brand owns it (5 brands, 9%)
polyester resin demand & seasonality
Weekly Amazon search volume, last 104 weeks — +11.7% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.6×
Top polyester resin search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.- polyester resin35K/yr
- polyester resin for fiberglass10K/yr
- fiberglass resin gallon4K/yr
- fiberglass resin 1 gallon4K/yr
- laminating resin4K/yr
Top polyester resin products & what they sell for
Every tracked product — its share of the shelf, its review moat, and what it sells for.Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 20 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
FGCI Boatyard Polyester Laminating Resin 1 Quart Kit with MEKP Hardener
FGCI$19.654.3★10 rev
Polymer World- Premium Grade Polyester Resin 1-10 Gallon Kit with MEKP for Boats Cars Surfboard RV Pools Canoes Jetskis Watercrafts (1 1 Gallon)
Polymer World$44.384.7★350 rev
TotalBoat Polyester Laminating Resin - Marine Grade Fiberglass Resin and MEKP Catalyst for Layups and Repairs (Gallon)
TotalBoat$60.944.6★1,182 rev
FGCI Boatyard Polyester Laminating Resin 1 Gallon Kit with MEKP Hardener
FGCI$41.154.5★64 rev
FIBERLAM Plus 1-10G Polyester Resin 1-10 Gallon +MEKP Hardener; Low Viscosity Coating for Laminating Fiberglass mat/Biaxle/Cloth; Boat/RV/Automotive/Canoe/Surfboard| Extended TACK Time (1 Gallon)
Generic$44.914.6★242 rev
Newest
by launch date
Evercoat Body Shop 105007 Pro-Grade Fiberglass Resin for Repairing and Rebuilding Panels & Holes in Fiberglass Metal Wood & More Easy Mix Hardener Included 32 Fl Oz.
EVERCOAT Body Shop$22.70165 rev
FIBERLAM Plus 1-10G Polyester Resin 1-10 Gallon +MEKP Hardener; Low Viscosity Coating for Laminating Fiberglass mat/Biaxle/Cloth; Boat/RV/Automotive/Canoe/Surfboard| Extended TACK Time (2 Gallon)
Generic$88.97242 rev
FIBERLAM Plus 1-10G Polyester Resin 1-10 Gallon +MEKP Hardener; Low Viscosity Coating for Laminating Fiberglass mat/Biaxle/Cloth; Boat/RV/Automotive/Canoe/Surfboard| Extended TACK Time (1 Gallon)
Generic$44.91242 rev
J-B Weld Fiberglass Resin - Gallon - Bath Marine & Auto
J-B Weld$61.13581 rev
J-B Weld Fiberglass Resin - Quart - Bath Marine & Auto
J-B Weld$28.03581 rev
Trending
90-day click momentumFGCI Boatyard Polyester Laminating Resin 1 Quart Kit with MEKP Hardener
FGCI$19.654.3★
FGCI Boatyard Polyester Laminating Resin 1 Gallon Kit with MEKP Hardener
FGCI$41.154.5★
FGCI Surfboard Polyester Resin 1 Gallon Kit with MEKP Hardener Clear Laminating Resin for Fiberglass Cloth and Surfboard Building Made in the USA
FGCI$46.744.7★
FIBERLAM Plus 1-10G Polyester Resin 1-10 Gallon +MEKP Hardener; Low Viscosity Coating for Laminating Fiberglass mat/Biaxle/Cloth; Boat/RV/Automotive/Canoe/Surfboard| Extended TACK Time (2 Gallon)
Generic$88.974.6★
Fiberglass Supply Depot Premium DCPD ISO Blend Polyester Resin with 15cc MEKP Hardener Marine & Automotive Laminating Resin for Fiberglass Mat Biaxial & Cloth (Pint)
Fiberglass Supply Depot$23.924.2★
What reviews say buyers love and hate about polyester resin
What buyers praise and complain about, mined from review topics.What buyers love
“Good product and easy to use”
“Good value”
“Easy to use”
“The fibreglass resin is good quality”
“Great purchase, as described”
“Works well”
“has good instructions”
“provided the strength”
“feels incredibly durable”
“The cured finish looks excellent”
What buyers complain about
“Leaking”
“Poor leveling”
“But, I stirred that 1:1 for over 30 minutes with an electric whisk and it NEVER TURNED CLEAR”
“Smells like you don't want to have around while it dries”
“Became so hot I shouldnt hold the container”
“This is very deceiving”
“was a mess to deal with”
“Arrived early used yesterday”
“I was not able to purchase a replacement”
“It looks textured”
Top return reasons
Common polyester resin questions
- Is polyester resin profitable to sell on Amazon United States?
- The niche generates $121K/yr across 20 tracked products. 90-day search growth is +11.7%. Flapen's verdict: Skip it (49/100).
- How competitive is the polyester resin niche?
- 11 brands and 50 sellers compete. The top 5 products take 69% of clicks and top 5 brands hold 87% of demand.
- What do buyers complain about in polyester resin?
- Top complaints mined from reviews: Leak-Proof, Quality-Overall, Functionality-Overall. The return rate is 0.4%.
- When does demand for polyester resin peak?
- Demand is steady year-round — the busiest month runs 1.6× the quietest.
- What does it cost to enter the polyester resin niche?
- Listings span $19.65–$88.97; the average listing price is $45.61 (sweet spot $15–$100). The average incumbent carries 443 reviews — the moat a new listing must climb.