Fiberglass Filler
MaybeAn estimated 0.3% of orders come back. But the top 5 products take 68% of clicks, so Fiberglass Filler is a Maybe.
- Flapen Score
- 56 / 100Top 19% of 7,287 Automotive niches · +7 vs the category median of 4956
- Market size
- $277K/yr143K searches / yr
- 90-day growth
- +30.6%search demand this quarter
- Competition
- 68%top-5 click share · 10 brands · 86 sellers
Flapen Score
Fiberglass Filler against its category
The dotted line is the Automotive average. Past it, Fiberglass Filler is stronger. Inside it, weaker.
Market
The Fiberglass Filler market on Amazon at a glance
Shoppers on Amazon United States searched for Fiberglass Filler 143K times last year and spent an estimated $277K. The top 5 brands take 82% of clicks. Demand peaks in May. Flapen scores it 56 out of 100, a Maybe.
01 · Demand
An estimated 5.8% of those searches ended in a purchase.
Shoppers searched for this 143K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 5.8% of those searches ended in a purchase. Searches in the last 90 days moved +30.6% against the 90 days before. Searches, conversion and average price together put the market at an estimated $277K a year.
- Searches, last 12 months
- 143K
- Growth, 90 days vs prior 90
- +30.6%
- Conversion, latest week
- 5.8%
- Market size, estimated
- $277Ka year
- Peak month
- May1.8× the quietest month
- Top search term
- fiberglass filler27K searches a year
02 · Price
A sale here is worth $33.19.
Listings sell for $33.19 on average, from $7.31 to $60.46. Amazon reports units sold in ranges. This niche sold 10K to 13K a year. The average listing sells 750 to 1,000 of them. At $33.19 that is $25K to $33K a year per listing.
- Average price
- $33.19inside the $15 to $100 sweet spot
- Price range
- $7.31–$60.46
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 10K–13K
- Units per listing a year
- 750–1,000
- Revenue per listing a year
- $25K–$33K
- Returns
- 0.3%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is low.
87% of listings pay for placement with sponsored ads. 80% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #47 within Fillers, Adhesives & Sealants. It carries 763 reviews at 4.56 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 87%
- Prime listings
- 80%
- Out of stock, average day
- 0.0%
- Average rank
- #47in Fillers, Adhesives & Sealants
- Average rating
- 4.56 starsAmazon United States average 4.42 stars
- Average reviews
- 763per listing
- Listings tracked
- 15
04 · Newcomers
Brands here are established.
The brands on the shelf have sold for 67 months on average, so the names here are established.
- Launched, last 12 months
- 0
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 67 months
Products
Top Fiberglass Filler products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 8, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
3M Bondo Short Strand Fiberglass Reinforced Filler 1.37 LB (621 g) with Bondo Cream Hardener 0.5 oz (14g) Repair Holes Up To 0.5 IN Waterproof (SS-PT-ES)
- Price
- $15.03
- Rating
- 4.6/5
- Reviews
- 1,659
- Age
- 12y ago

J-B Weld Quart - Fiberglass Short-Strained Filler
- Price
- $23.94
- Rating
- 4.7/5
- Reviews
- 267
- Age
- 1y ago

Bondo Bondo-Hair Long Strand Fiberglass Reinforced Filler 00762 1 Quart
- Price
- $16.25
- Rating
- 4.6/5
- Reviews
- 1,147
- Age
- 14y ago

Bondo Glass Short Strand Reinforced Fiberglass Filler Stage 2 2.56 Oz Filler and 1 Oz Cream Hardener
- Price
- $21.25
- Rating
- 4.7/5
- Reviews
- 2,330
- Age
- 20y ago

Duraglas Fiberglass Filled Filler 1 Gallon
- Price
- $60.46
- Rating
- 4.7/5
- Reviews
- 813
- Age
- 17y ago
Trending
estimated 90-day click momentum
FGCI Boatyard Polyester Laminating Resin 1 Quart Kit with MEKP Hardener Clear Fiberglass Resin for Boat Repair and Small Layup Projects Made in the USA
- Price
- $19.55
- Rating
- 4.0/5
- Reviews
- 8
- Age
- 14y ago

TotalBoat TotalFair Marine Epoxy Fairing Compound for Fiberglass Wood Aluminum and Steel (2 Pint Kit)
- Price
- $45.88
- Rating
- 4.5/5
- Reviews
- 1,389
- Age
- 11y ago

Bondo Glass Short Strand Reinforced Fiberglass Filler Stage 2 2.56 Oz Filler and 1 Oz Cream Hardener
- Price
- $21.25
- Rating
- 4.7/5
- Reviews
- 2,330
- Age
- 20y ago

LAUCO Ultra Fiber Sandable Fiberglass Filler Bridges Holes Water Resistant Lightweight for Fiberglass Steel Plastics Base Color of Yellow-Green 3 Liters
- Price
- $53.28
- Rating
- 4.7/5
- Reviews
- 100
- Age
- 2y ago

Bondo Bondo-Hair Long Strand Fiberglass Reinforced Filler 00762 1 Quart
- Price
- $16.25
- Rating
- 4.6/5
- Reviews
- 1,147
- Age
- 14y ago
Newest
by launch date
Evercoat Body Shop 105010 Pro-Grade Reinforced Filler Added Strength and Durability for Dents in Aluminum Fiberglass & More Easy Mix Hardener Included 13 Fl Oz.
- Price
- $16.84
- Rating
- 4.8/5
- Reviews
- 51
- Age
- 1y ago

J-B Weld Quart - Fiberglass Short-Strained Filler
- Price
- $23.94
- Rating
- 4.7/5
- Reviews
- 267
- Age
- 1y ago

LAUCO Ultra Fiber Sandable Fiberglass Filler Bridges Holes Water Resistant Lightweight for Fiberglass Steel Plastics Base Color of Yellow-Green 3 Liters
- Price
- $53.28
- Rating
- 4.7/5
- Reviews
- 100
- Age
- 2y ago

Frienda 6 Pcs Body Filler Spreaders Plastic Tools for Automotive Applying Putties Glazes Caulks and Paint (3 Sizes)
- Price
- $7.31
- Rating
- 4.5/5
- Reviews
- 1,507
- Age
- 3y ago

TotalBoat Polyester Structural Repair Putty - Marine Grade Long Strand Fiber Fiberglass Reinforced Filler for Boat and Automotive Repair (Quart Kit)
- Price
- $40.23
- Rating
- 4.6/5
- Reviews
- 869
- Age
- 8y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 68% of clicks. Leaders hold, but buyers still shop past them.
Brands
10 rising
Sellers
86
Est. top-5 brand share
82%
Top 20: 100%
Est. top-5 click share
68%
Top 20: 100%
Open market
13%
- bondo28%
- 3M19%
- J-B Weld14%
- U.S. Chemical & Plastics12%
- Evercoat9%
- TotalBoat5%
- Open — no brand owns it (4 brands, 13%)
Demand
Fiberglass Filler search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: May · busiest ÷ quietest = 1.8×
Search terms
Top Fiberglass Filler search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- fiberglass filler27K/yr
- fiberglass body filler16K/yr
- bondo glass12K/yr
- fiberglass bondo12K/yr
- duraglass body filler8K/yr
- short strand fiberglass filler6K/yr
- duraglass9K/yr
- bondo fiberglass6K/yr
- kitty hair fiberglass filler6K/yr
- fiberglass putty5K/yr
Reviews and returns
What reviews say buyers love and hate about Fiberglass Filler
We read the reviews and the return reasons for every product selling here.
“Unfortunately, the one I received is hard as a rock with almost no flex at all”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
22 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Fiberglass Filler questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









