---
title: "fiberglass filler — Niche Verdict: Skip it (46/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/automotive/fiberglass-filler"
last_updated: "2026-07-10T01:47:17.811Z"
locale: en
meta:
  description: "a small market ($277K/yr) — fiberglass filler doesn't clear our bar today."
  "og:description": "a small market ($277K/yr) — fiberglass filler doesn't clear our bar today."
  "og:title": "fiberglass filler — Niche Verdict: Skip it (46/100) | Amazon United States - Flapen"
---

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# **fiberglass filler**

**Skip it****46/100 **

a small market ($277K/yr) — fiberglass filler doesn't clear our bar today.

**Market/yr**

**$277K**

**Growth (1y)**

**+162.3%**

**Products**

**15**

**Brands**

**10**

was 6 a year ago

**Sellers**

**86**

**Price range**

**$7.31–$60.46**

**Returns**

**0.3%**

**Rating**

**4.6★**

**Skip it**

Scored 46/100 across market size, growth, competition, quality gap, and returns.

Market sizeGrowthCompetitionQuality gapReturns

Market size

**14**

 ×0.30

Growth

**72**

 ×0.30

Competition

**34**

 ×0.20

Quality gap

**34**

 ×0.10

Returns

**98**

 ×0.10

## **Demand**

Weekly Amazon search volume, last 104 weeks — +162.3% year over year.

3K2KSpike '25Spike '26Jul '24Nov '24Mar '25Jul '25Nov '25Mar '26

## **Seasonality**

Monthly demand index across the year — 1.00 is average.

JFMAMJJASOND

Peak months: May · busiest ÷ quietest = 1.8×

## **Competition**

- bondo28% - 3M19% - J-B Weld14% - U.S. Chemical & Plastics12% - Evercoat9% - TotalBoat5% - Other (4 brands)13%

The top 5 products take 68% of clicks — established leaders, but buyers still shop beyond them. 10 brands and 86 sellers compete here.

**Brands**

**10 **▲rising

was 6 a year ago

**Sellers**

**86**

**Top 5 brand share**

**82%**

#ProductBrandPriceRatingReviewsClick shareTrend

1
![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)](https://m.media-amazon.com/images/I/41i9RYQOSoL.jpg) [**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)**](https://www.amazon.com/dp/B00PB3NTFO)

bondo$15.034.6★1,65928%▼falling

2
![J-B Weld Quart - Fiberglass Short-Strained Filler](https://m.media-amazon.com/images/I/41G5Qlcq74L.jpg) [**J-B Weld Quart - Fiberglass Short-Strained Filler**](https://www.amazon.com/dp/B0DQTDTNS2)

J-B Weld$23.944.7★26714%▲rising

3
![Bondo Bondo-Hair Long Strand Fiberglass Reinforced Filler 00762 1 Quart](https://m.media-amazon.com/images/I/41j2BdolkuL.jpg) [**Bondo Bondo-Hair Long Strand Fiberglass Reinforced Filler 00762 1 Quart**](https://www.amazon.com/dp/B000CINDQ8)

3M$16.254.6★1,14710%▲rising

4
![Bondo Glass Short Strand Reinforced Fiberglass Filler Stage 2 2.56 Oz Filler and 1 Oz Cream Hardener](https://m.media-amazon.com/images/I/41irbTYU3gL.jpg) [**Bondo Glass Short Strand Reinforced Fiberglass Filler Stage 2 2.56 Oz Filler and 1 Oz Cream Hardener**](https://www.amazon.com/dp/B000VKZ3JM)

3M$21.254.7★2,3309%▲rising

5
![Duraglas Fiberglass Filled Filler 1 Gallon](https://m.media-amazon.com/images/I/11sMMATF09L.jpg) [**Duraglas Fiberglass Filled Filler 1 Gallon**](https://www.amazon.com/dp/B002I0MOY0)

U.S. Chemical & Plastics$60.464.7★8136%▼falling

6
![DURAGLASS 25.6 U.S. FL OZ Part Number 24035](https://m.media-amazon.com/images/I/41JzVG6OWuL.jpg) [**DURAGLASS 25.6 U.S. FL OZ Part Number 24035**](https://www.amazon.com/dp/B0082LF7B6)

U.S. Chemical & Plastics$38.584.7★3626%▼falling

7
![Evercoat Everglass Short Strand Fiberglass Reinforced Filler - Waterproof Filler - 32 Fl Oz](https://m.media-amazon.com/images/I/51nSPkN0OVL.jpg) [**Evercoat Everglass Short Strand Fiberglass Reinforced Filler - Waterproof Filler - 32 Fl Oz**](https://www.amazon.com/dp/B0000AYHHN)

Evercoat$42.724.5★5015%—flat

8
![LAUCO Ultra Fiber Sandable Fiberglass Filler Bridges Holes Water Resistant Lightweight for Fiberglass Steel Plastics Base Color of Yellow-Green 3 Liters](https://m.media-amazon.com/images/I/41GUeWgSUeL.jpg) [**LAUCO Ultra Fiber Sandable Fiberglass Filler Bridges Holes Water Resistant Lightweight for Fiberglass Steel Plastics Base Color of Yellow-Green 3 Liters**](https://www.amazon.com/dp/B0CLM9SWCN)

LAUCO$53.284.7★1004%▲rising

9
![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.](https://m.media-amazon.com/images/I/41v-eNv5FTL.jpg) [**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.**](https://www.amazon.com/dp/B0DYPG77RB)

EVERCOAT Body Shop$16.844.8★514%—flat

10

![TotalBoat Polyester Structural Repair Putty - Marine Grade Long Strand Fiber Fiberglass Reinforced Filler for Boat and Automotive Repair (Quart Kit)](https://m.media-amazon.com/images/I/51ZyDjvAWzL.jpg) [**TotalBoat Polyester Structural Repair Putty - Marine Grade Long Strand Fiber Fiberglass Reinforced Filler for Boat and Automotive Repair (Quart Kit)**](https://www.amazon.com/dp/B07C9D2GFJ)

TotalBoat$40.234.6★8693%—flat

11

![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](https://m.media-amazon.com/images/I/310EFAbRw5L.jpg) [**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**](https://www.amazon.com/dp/B006VY78QS)

FGCI$19.554.0★83%▲rising

12

![Everocat Kitty Hair Long Strand Fiberglass Reinforced Filler for Fiberglass & Sheet Metal - 32 Fl Oz](https://m.media-amazon.com/images/I/51dIEZNeocL.jpg) [**Everocat Kitty Hair Long Strand Fiberglass Reinforced Filler for Fiberglass & Sheet Metal - 32 Fl Oz**](https://www.amazon.com/dp/B000Q8ICHY)

Evercoat$45.104.3★1382%—flat

13

![Frienda 6 Pcs Body Filler Spreaders Plastic Tools for Automotive Applying Putties Glazes Caulks and Paint (3 Sizes)](https://m.media-amazon.com/images/I/41AWD3UibDL.jpg) [**Frienda 6 Pcs Body Filler Spreaders Plastic Tools for Automotive Applying Putties Glazes Caulks and Paint (3 Sizes)**](https://www.amazon.com/dp/B0BY8QZY5Z)

Frienda$7.314.5★1,5072%—flat

14

![TotalBoat TotalFair Marine Epoxy Fairing Compound for Fiberglass Wood Aluminum and Steel (2 Pint Kit)](https://m.media-amazon.com/images/I/41h7pL4qwFL.jpg) [**TotalBoat TotalFair Marine Epoxy Fairing Compound for Fiberglass Wood Aluminum and Steel (2 Pint Kit)**](https://www.amazon.com/dp/B00S9RBWIA)

TotalBoat$45.884.5★1,3892%▲rising

15

![Evercoat Tiger Hair Long Strand Fiberglass Reinforced Filler - Waterproof Filler - 32 Fl Oz](https://m.media-amazon.com/images/I/51+ykLZtMEL.jpg) [**Evercoat Tiger Hair Long Strand Fiberglass Reinforced Filler - Waterproof Filler - 32 Fl Oz**](https://www.amazon.com/dp/B000P72GKK)

Evercoat$51.374.5★3012%—flat

## **Product shelf**

All 15 tracked products in this niche.

Top sellersNewestTrending

[![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)](https://m.media-amazon.com/images/I/41i9RYQOSoL.jpg)**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)** bondo**$15.03**4.6★1,659 reviews](https://www.amazon.com/dp/B00PB3NTFO) [![J-B Weld Quart - Fiberglass Short-Strained Filler](https://m.media-amazon.com/images/I/41G5Qlcq74L.jpg)**J-B Weld Quart - Fiberglass Short-Strained Filler** J-B Weld**$23.94**4.7★267 reviews](https://www.amazon.com/dp/B0DQTDTNS2) [![Bondo Bondo-Hair Long Strand Fiberglass Reinforced Filler 00762 1 Quart](https://m.media-amazon.com/images/I/41j2BdolkuL.jpg)**Bondo Bondo-Hair Long Strand Fiberglass Reinforced Filler 00762 1 Quart** 3M**$16.25**4.6★1,147 reviews](https://www.amazon.com/dp/B000CINDQ8) [![Bondo Glass Short Strand Reinforced Fiberglass Filler Stage 2 2.56 Oz Filler and 1 Oz Cream Hardener](https://m.media-amazon.com/images/I/41irbTYU3gL.jpg)**Bondo Glass Short Strand Reinforced Fiberglass Filler Stage 2 2.56 Oz Filler and 1 Oz Cream Hardener** 3M**$21.25**4.7★2,330 reviews](https://www.amazon.com/dp/B000VKZ3JM) [![Duraglas Fiberglass Filled Filler 1 Gallon](https://m.media-amazon.com/images/I/11sMMATF09L.jpg)**Duraglas Fiberglass Filled Filler 1 Gallon** U.S. Chemical & Plastics**$60.46**4.7★813 reviews](https://www.amazon.com/dp/B002I0MOY0) [![DURAGLASS 25.6 U.S. FL OZ Part Number 24035](https://m.media-amazon.com/images/I/41JzVG6OWuL.jpg)**DURAGLASS 25.6 U.S. FL OZ Part Number 24035** U.S. Chemical & Plastics**$38.58**4.7★362 reviews](https://www.amazon.com/dp/B0082LF7B6) [![Evercoat Everglass Short Strand Fiberglass Reinforced Filler - Waterproof Filler - 32 Fl Oz](https://m.media-amazon.com/images/I/51nSPkN0OVL.jpg)**Evercoat Everglass Short Strand Fiberglass Reinforced Filler - Waterproof Filler - 32 Fl Oz** Evercoat**$42.72**4.5★501 reviews](https://www.amazon.com/dp/B0000AYHHN) [![LAUCO Ultra Fiber Sandable Fiberglass Filler Bridges Holes Water Resistant Lightweight for Fiberglass Steel Plastics Base Color of Yellow-Green 3 Liters](https://m.media-amazon.com/images/I/41GUeWgSUeL.jpg)**LAUCO Ultra Fiber Sandable Fiberglass Filler Bridges Holes Water Resistant Lightweight for Fiberglass Steel Plastics Base Color of Yellow-Green 3 Liters** LAUCO**$53.28**4.7★100 reviews](https://www.amazon.com/dp/B0CLM9SWCN)

## **Reviews**

What buyers praise and complain about, mined from review topics.

### **What buyers love **

**Quality-Overall**26%

*“Great product as”*

**Efficiency**13%

*“Worked good for what I needed”*

**Ease Of Use**11%

*“This product is easy to use”*

**Value For Money**11%

*“great price”*

**Maintenance And Repair**9%

*“Good small kit for small repairs”*

**Advertised Vs Actual Product**6%

*“workes as advertised”*

**Durability**4%

*“Worked great and lasting not falling apart”*

**Water Resistance**3%

*“This is a good quality waterproof body filler with long strands of fiberglass strands to make it much stronger”*

**Assembly/Installation**2%

*“it will set up on you in just minutes”*

**Ease Of Cleaning**2%

*“didn't make to much of a mess”*

### **What buyers complain about **

**Flexibility**15%

*“Unfortunately, the one I received is hard as a rock with almost no flex at all”*

**Advertised Vs Actual Product**15%

*“Deceptive Ad & Non Returnable”*

**Hard Feel**12%

*“Hard as a rock”*

**Strength**8%

*“Very brittle”*

**Quality-Overall**5%

*“Complete Garbage”*

**Instructions/User Manual/Troubleshooting**4%

*“After reading detailed instructions determined wouldnt work for my project”*

**Color**4%

*“You'd think they would provide a off-color hardener”*

**Texture/Consistency-Overall**4%

*“the second batch I used today does not have the same smooth consistency as the first”*

**Leak-Proof**4%

*“Leaking”*

**Durability**4%

*“Wouldnt fully cure after 4 days”*

#### **Top return reasons**- Flexibility16% - Size-Overall15% - Material Quality12% - Functionality-Overall11% - Defective Material/Parts9% - Value For Money7% - Advertised Vs Actual Product6% - Strength6% - Quality-Overall4% - Compatibility-Overall3%